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Showing 1 - 100 of 515 results

Evaluation of Motorcycle Helmet Test Procedures

Bendig, Colleen ;

Wietholter, Kedryn

2026-04-01 | PDF

FMVSS No. 218, Motorcycle helmets, specifies minimum performance requirements for helmets used by motorcyclists and other motor vehicle users. FMVSS No. 218 has three performance test types that have remained largely unchanged since it was first published in 1973: an impact attenuation test, a penetration test, and a retention system test. In 2013 ...

04/02/2026

Title : Evaluation of Motorcycle Helmet Test Procedures Creator(s) : Bendig, Colleen;Wietholter, Kedryn; Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration. Vehicle Research and Test Center;National Transportation Research Center, Inc.; Corporate Contributor(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 2026-04-01 Report Number : DOT HS 813 782 DOI : https://doi.org/10.21949/qfky-yp73 Bendig, Colleen and Wietholter, Kedryn (2026). Evaluation of Motorcycle Helmet Test Procedures. https://doi.org/10.21949/qfky-yp73 Bendig, Colleen and Wietholter, Kedryn "Evaluation of Motorcycle Helmet Test Procedures" (2026), https://doi.org/10.21949/qfky-yp73 Bendig, Colleen and Wietholter, Kedryn "Evaluation of Motorcycle Helmet Test Procedures" , 2026, https://doi.org/10.21949/qfky-yp73 Export RIS Citation Information. TY - Tech Report AU - Bendig, Colleen AU - Wietholter, Kedryn A2 - United States. Department of Transportation. National Highway Traffic Safety Administration. Vehicle Research and Test Center A2 - National Transportation Research Center, Inc. A3 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - FMVSS No. 218, Motorcycle helmets, specifies minimum performance requirements for helmets used by motorcyclists and other motor vehicle users. FMVSS No. 218 has three performance test types that have remained largely unchanged since it was first published in 1973: an impact attenuation test, a penetration test, and a retention system test. In 2013 NHTSA initiated a helmet testing research program with compliance test labs. Based on this testing, adjustments were made to the test procedures and were evaluated in this study. NHTSA’s testing in this report aimed to (1) assess the feasibility of conducting modified FMVSS No. 218 tests and other performance tests, and (2) evaluate the repeatability of each of the modified test procedures assessed. Six helmet models were tested in six test types. Two of the test types were based on tests included in FMVSS No. 218, while four of the test types were based on tests included in international standards. AN - dot:89792 DO - https://doi.org/10.21949/qfky-yp73 ET - Final Report KW - Motorcycle helmets KW - Motorcycles KW - Test procedures KW - Performance tests KW - FMVSSS No. 218 LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 2026-04-01 SN - DOT HS 813 782 TI - Evaluation of Motorcycle Helmet Test Procedures M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89792 ER -
Early Estimate of Motor Vehicle Traffic Fatalities and Fatality Rate in 2025 [Traffic Safety Facts]

United States. Department of Transportation. National Highway Traffic Safety Administration

2026-04-01 | PDF

This edition of Crash*Stats is a brief statistical summary of projected traffic fatalities and fatality rate for 2024 when an estimated 36,640 people died in motor vehicle traffic crashes, a decrease of about 6.7 percent compared to 39,254 fatalities in 2024. The fourth quarter of 2025 represents the 15th consecutive quarterly decline in fatalities ...

04/01/2026

Title : Early Estimate of Motor Vehicle Traffic Fatalities and Fatality Rate in 2025 [Traffic Safety Facts] Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 2026-04-01 Report Number : DOT HS 813 800 DOI : https://doi.org/10.21949/7wyp-yb17 United States. Department of Transportation. National Highway Traffic Safety Administration (2026). Early Estimate of Motor Vehicle Traffic Fatalities and Fatality Rate in 2025 [Traffic Safety Facts]. https://doi.org/10.21949/7wyp-yb17 United States. Department of Transportation. National Highway Traffic Safety Administration "Early Estimate of Motor Vehicle Traffic Fatalities and Fatality Rate in 2025 [Traffic Safety Facts]" (2026), https://doi.org/10.21949/7wyp-yb17 United States. Department of Transportation. National Highway Traffic Safety Administration "Early Estimate of Motor Vehicle Traffic Fatalities and Fatality Rate in 2025 [Traffic Safety Facts]" , 2026, https://doi.org/10.21949/7wyp-yb17 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - This edition of Crash*Stats is a brief statistical summary of projected traffic fatalities and fatality rate for 2024 when an estimated 36,640 people died in motor vehicle traffic crashes, a decrease of about 6.7 percent compared to 39,254 fatalities in 2024. The fourth quarter of 2025 represents the 15th consecutive quarterly decline in fatalities beginning with the second quarter of 2022. If realized, the estimated percentage decrease for 2025 would be the fifth largest in the recorded history of the Fatality Analysis Reporting System, bringing total fatalities back to the pre-pandemic levels seen in 2019. In 2025 the fatality rate dropped to 1.10 fatalities per 100 million vehicle miles traveled, down from 1.19 in 2024, the second lowest fatality rate in recorded history (started in 1975). AN - dot:89791 DO - https://doi.org/10.21949/7wyp-yb17 ET - Traffic Safety Facts - Crash Stats KW - Fatalities KW - Statistical trends KW - Traffic safety KW - Vehicle miles of travel LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 2026-04-01 SN - DOT HS 813 800 TI - Early Estimate of Motor Vehicle Traffic Fatalities and Fatality Rate in 2025 [Traffic Safety Facts] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89791 ER -
Overview of Motor Vehicle Traffic Crashes in 2024 [Traffic Safety Facts}

United States. Department of Transportation. National Highway Traffic Safety Administration

2026-04-01 | PDF

There were 1,771 fewer people killed in motor vehicle traffic crashes on U.S. roadways during 2024, a 4.3-percent decrease from 41,025 in 2023 to 39,254 in 2024. The fatality rate per 100 million vehicle miles traveled (VMT) decreased 5.6 percent from 1.26 in 2023 to 1.19 in 2024. It represents the third year-to-year decrease in both fatalities and ...

04/01/2026

Title : Overview of Motor Vehicle Traffic Crashes in 2024 [Traffic Safety Facts} Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 2026-04-01 Report Number : DOT HS 813 791 DOI : https://doi.org/10.21949/grds-1877 United States. Department of Transportation. National Highway Traffic Safety Administration (2026). Overview of Motor Vehicle Traffic Crashes in 2024 [Traffic Safety Facts}. https://doi.org/10.21949/grds-1877 United States. Department of Transportation. National Highway Traffic Safety Administration "Overview of Motor Vehicle Traffic Crashes in 2024 [Traffic Safety Facts}" (2026), https://doi.org/10.21949/grds-1877 United States. Department of Transportation. National Highway Traffic Safety Administration "Overview of Motor Vehicle Traffic Crashes in 2024 [Traffic Safety Facts}" , 2026, https://doi.org/10.21949/grds-1877 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - There were 1,771 fewer people killed in motor vehicle traffic crashes on U.S. roadways during 2024, a 4.3-percent decrease from 41,025 in 2023 to 39,254 in 2024. The fatality rate per 100 million vehicle miles traveled (VMT) decreased 5.6 percent from 1.26 in 2023 to 1.19 in 2024. It represents the third year-to-year decrease in both fatalities and fatality rate since 2021. AN - dot:89790 DO - https://doi.org/10.21949/grds-1877 ET - Traffic Safety Facts - Research Note KW - Crash injuries KW - Fatalities KW - Statistical trends KW - Traffic crash victims LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 2026-04-01 SN - DOT HS 813 791 TI - Overview of Motor Vehicle Traffic Crashes in 2024 [Traffic Safety Facts} M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89790 ER -
Distracted Driving in 2024 [Traffic Safety Facts]

United States. Department of Transportation. National Highway Traffic Safety Administration

2026-04-01 | PDF

The National Highway Traffic Safety Administration works to reduce the occurrence of distracted driving and raise awareness of its dangers. This risky driving behavior poses a danger not only to vehicle occupants but pedestrians and pedalcyclists as well. Driver distraction is a specific type of driver inattention that occurs when drivers divert at ...

04/01/2026

Title : Distracted Driving in 2024 [Traffic Safety Facts] Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 2026-04-01 Report Number : DOT HS 813 790 DOI : https://doi.org/10.21949/z7ma-yc97 United States. Department of Transportation. National Highway Traffic Safety Administration (2026). Distracted Driving in 2024 [Traffic Safety Facts]. https://doi.org/10.21949/z7ma-yc97 United States. Department of Transportation. National Highway Traffic Safety Administration "Distracted Driving in 2024 [Traffic Safety Facts]" (2026), https://doi.org/10.21949/z7ma-yc97 United States. Department of Transportation. National Highway Traffic Safety Administration "Distracted Driving in 2024 [Traffic Safety Facts]" , 2026, https://doi.org/10.21949/z7ma-yc97 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - The National Highway Traffic Safety Administration works to reduce the occurrence of distracted driving and raise awareness of its dangers. This risky driving behavior poses a danger not only to vehicle occupants but pedestrians and pedalcyclists as well. Driver distraction is a specific type of driver inattention that occurs when drivers divert attention from the driving task to focus on some other activity. Discussions regarding distracted driving often center around cellphones and texting, but distracted driving also includes eating, talking to passengers, adjusting the radio or climate controls, or adjusting other vehicle controls. A distraction-affected traffic crash is any traffic crash in which a driver was identified as distracted at the time of the crash. AN - dot:89789 DO - https://doi.org/10.21949/z7ma-yc97 ET - Traffic Safety Facts - Research Note KW - Crash injuries KW - Distracted driving KW - Driving behavior KW - Fatalities KW - Risk taking LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 2026-04-01 SN - DOT HS 813 790 TI - Distracted Driving in 2024 [Traffic Safety Facts] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89789 ER -
Strategies for Improved Driver Behavior within Work Zones

Mishra, Sabyasachee ;

Golias, Mihalis

2025-10-01 | PDF

Work zones (WZs) are among the most hazardous roadway environments due to restricted geometry, temporary traffic control, and increased driver workload, which often lead to speeding and elevated crash frequency as well as severity. A section of roadway of nearly 8 miles long on I-65, in Robertson County, near the Kentucky state border, where additi ...

03/30/2026

Title : Strategies for Improved Driver Behavior within Work Zones Creator(s) : Mishra, Sabyasachee;Golias, Mihalis;Khattak, Asad J.;Everett, Jerry;Neupane, Pawan;Thapa, Diwas;Adeel, Muhammad; Corporate Creator(s) : University of Memphis. Department of Civil Engineering;University of Tennessee, Knoxville. Department of Civil and Environmental Engineering; Corporate Contributor(s) : Tennessee. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-10-01 Report Number : RES2023-23 URL : https://rosap.ntl.bts.gov/view/dot/89788 Mishra, Sabyasachee et al. (2025). Strategies for Improved Driver Behavior within Work Zones. Mishra, Sabyasachee et al. "Strategies for Improved Driver Behavior within Work Zones" (2025) Mishra, Sabyasachee et al. "Strategies for Improved Driver Behavior within Work Zones" , 2025 Export RIS Citation Information. TY - Tech Report AU - Mishra, Sabyasachee AU - Golias, Mihalis AU - Khattak, Asad J. AU - Everett, Jerry AU - Neupane, Pawan AU - Thapa, Diwas AU - Adeel, Muhammad A2 - University of Memphis. Department of Civil Engineering A2 - University of Tennessee, Knoxville. Department of Civil and Environmental Engineering A3 - Tennessee. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Work zones (WZs) are among the most hazardous roadway environments due to restricted geometry, temporary traffic control, and increased driver workload, which often lead to speeding and elevated crash frequency as well as severity. A section of roadway of nearly 8 miles long on I-65, in Robertson County, near the Kentucky state border, where additional lanes were being added, was identified as the study location. The posted speed limit of the WZ was 55 mph. This study evaluates the effectiveness of speed feedback mechanisms: Dynamic Speed Feedback Signs (DSFS), Speed Wizard (SW), and combinations of SW with Portable Changeable Message Signs (PCMS), in mitigating speeding behavior within freeway WZs. High-resolution vehicle trajectory data were collected through a multi-camera video system and analyzed using three complementary models: a Generalized Ordered Logit (GOL) model to identify determinants of speeding severity, a Bayesian Generalized Additive Model (BGAM) to examine non-linear speed adjustments, and a Spatial Lag Model (SLM) to assess inter-vehicle dependencies and spatial spillover effects. Results showed that DSFS and SW were the most effective interventions, significantly reducing mean speeds and severe speeding violations by at least 8%. Despite the speed limit of 55 mph, 75% of the vehicles travel at speeds higher than the posted limit. After crossing the feedback sign, the speed of the vehicle tended to stabilize around 58 mph, while higher speed vehicles decelerated and lower speed vehicles accelerated. Spatial effect on the driving behavior was found statistically significant, which showed speed reductions extended to neighboring vehicles, indicating collective behavioral adaptation. Overall, the findings demonstrate that speed feedback systems are highly effective, data-driven countermeasures for enhancing driver compliance and safety in WZs. AN - dot:89788 ET - Final Report KW - Work zones KW - Trajectory KW - Analysis KW - Feedback control KW - Speed limits KW - Traffic violations KW - Driving behavior KW - Strategic planning KW - Countermeasures KW - Traffic signs KW - Hazardous materials KW - Highways KW - Environmental impacts LA - English PB - Tennessee. Department of Transportation PY - 2025-10-01 SN - RES2023-23 TI - Strategies for Improved Driver Behavior within Work Zones M3 - Tech Report N1 - United States N1 - RES2023-23 UR - https://rosap.ntl.bts.gov/view/dot/89788 ER -
Teaming Up to Build the Highway Construction Workforce: Strategic Workforce Development

United States. Department of Transportation. Federal Highway Administration

2023-06-23 | PDF

With a constant demand for maintenance and operations workers in the highway construction industry, collaboration is crucial for identifying, training, placing, and retaining qualified individuals in needed roles. The U.S. Department of Transportation Federal Highway Administration helps to facilitate partnerships among industry, government, educat ...

03/30/2026

Title : Teaming Up to Build the Highway Construction Workforce: Strategic Workforce Development Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2023-06-23 URL : https://rosap.ntl.bts.gov/view/dot/89787 United States. Department of Transportation. Federal Highway Administration (2023). Teaming Up to Build the Highway Construction Workforce: Strategic Workforce Development. United States. Department of Transportation. Federal Highway Administration "Teaming Up to Build the Highway Construction Workforce: Strategic Workforce Development" (2023) United States. Department of Transportation. Federal Highway Administration "Teaming Up to Build the Highway Construction Workforce: Strategic Workforce Development" , 2023 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration AB - With a constant demand for maintenance and operations workers in the highway construction industry, collaboration is crucial for identifying, training, placing, and retaining qualified individuals in needed roles. The U.S. Department of Transportation Federal Highway Administration helps to facilitate partnerships among industry, government, education, and non-profit representatives to help fill workforce shortages. The National Skills Coalition (NSC) is committed to providing inclusive, high-quality training so that more people have access to the excellent pay and great benefits a career in highway construction offers, while more businesses fill workforce gaps and increase growth. Through its advocacy work, NSC has helped to change hundreds of policies, transforming lives and enhancing local businesses and economies across the nation. AN - dot:89787 KW - Education and training KW - Training KW - Road construction KW - Road construction industry KW - Transportation careers LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2023-06-23 TI - Teaming Up to Build the Highway Construction Workforce: Strategic Workforce Development M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89787 ER -
Highway Construction Workforce Partnership: Strategic Workforce Development: Placing Tomorrow's Highway Construction Workforce

United States. Department of Transportation. Federal Highway Administration

2021-09-13 | PDF

When it comes to placing qualified individuals into the highway construction positions that support the nation's transportation industry and drive the economy forward, the Highway Construction Workforce Partnership (HCWP) established by the U.S. Department of Transportation's Federal Highway Administration (FHWA) offers a seamless pathway. HCWPs in ...

03/30/2026

Title : Highway Construction Workforce Partnership: Strategic Workforce Development: Placing Tomorrow's Highway Construction Workforce Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Wert, Katrina;Foster, Corey;James, Stephanie; Published Date : 2021-09-13 URL : https://rosap.ntl.bts.gov/view/dot/89786 United States. Department of Transportation. Federal Highway Administration (2021). Highway Construction Workforce Partnership: Strategic Workforce Development: Placing Tomorrow's Highway Construction Workforce. United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Placing Tomorrow's Highway Construction Workforce" (2021) United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Placing Tomorrow's Highway Construction Workforce" , 2021 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Wert, Katrina A4 - Foster, Corey A4 - James, Stephanie AB - When it comes to placing qualified individuals into the highway construction positions that support the nation's transportation industry and drive the economy forward, the Highway Construction Workforce Partnership (HCWP) established by the U.S. Department of Transportation's Federal Highway Administration (FHWA) offers a seamless pathway. HCWPs in Alabama, Arizona, and Denver have instituted programs that offer the training, support, and placement to sustain a lasting workforce. AN - dot:89786 KW - Education and training KW - Training KW - Road construction KW - Road construction industry KW - Transportation careers LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2021-09-13 TI - Highway Construction Workforce Partnership: Strategic Workforce Development: Placing Tomorrow's Highway Construction Workforce M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89786 ER -
Traffic Data for Network Level Pavement Structural Assessment and Performance Grade Asphalt Selection

Zhong, Jingtao ;

Gu, Yangsong

2026-01-01 | PDF

Truck traffic is an important input for pavement design and analysis. Proper characterization of traffic patterns contributes to the design of reliable and cost-effective pavement structures. Axle load spectra obtained from the Long-Term Pavement Performance (LTPP) database, together with local Annual Average Daily Traffic (AADT) data from Tennesse ...

03/30/2026

Title : Traffic Data for Network Level Pavement Structural Assessment and Performance Grade Asphalt Selection Creator(s) : Zhong, Jingtao;Gu, Yangsong;Huang, Kai;Han, Lee D.;Huang, Baoshan; Corporate Creator(s) : University of Tennessee, Knoxville. Department of Civil and Environmental Engineering Corporate Contributor(s) : Tennessee. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-01-01 Report Number : RES2024-09 URL : https://rosap.ntl.bts.gov/view/dot/89785 Zhong, Jingtao et al. (2026). Traffic Data for Network Level Pavement Structural Assessment and Performance Grade Asphalt Selection. Zhong, Jingtao et al. "Traffic Data for Network Level Pavement Structural Assessment and Performance Grade Asphalt Selection" (2026) Zhong, Jingtao et al. "Traffic Data for Network Level Pavement Structural Assessment and Performance Grade Asphalt Selection" , 2026 Export RIS Citation Information. TY - Tech Report AU - Zhong, Jingtao AU - Gu, Yangsong AU - Huang, Kai AU - Han, Lee D. AU - Huang, Baoshan A2 - University of Tennessee, Knoxville. Department of Civil and Environmental Engineering A3 - Tennessee. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Truck traffic is an important input for pavement design and analysis. Proper characterization of traffic patterns contributes to the design of reliable and cost-effective pavement structures. Axle load spectra obtained from the Long-Term Pavement Performance (LTPP) database, together with local Annual Average Daily Traffic (AADT) data from Tennessee, were analyzed to establish regional Level-2 traffic inputs for the Mechanistic-Empirical Pavement Design in Tennessee. Hierarchical clustering was performed to characterize the traffic patterns among the analyzed Weight-in-Motion (WIM) sites, followed by the sensitivity analysis to evaluate the impact of generated traffic inputs. Truck factors derived from National Cooperative Highway Research Program (NCHRP), LTPP Typical, LTPP Global, and cluster-based datasets were compared with TDOT default values. Results demonstrate that cluster-based level 2 provides the closest performance predictions compared with those from the site-specific level 1 data. TDOT’s truck factors generally underestimate the structural number (SN) compared with the national datasets, whereas cluster-based local calibration tends to yield more conservative SN estimates for new pavement design. Additionally, the distribution of ESALs estimated from TDOT’s default data was employed to classify traffic into four loading levels (standard, heavy, very heavy, and extreme) to support network-level binder selection. This classification attempts to provide a more rational basis for selecting Performance-graded (PG) asphalt binder consistent with expected loading conditions. The backcalculated SN values, derived by the estimated ESALs, serve as a valuable benchmark for evaluating required pavement structural capacity and supporting both new design and rehabilitation planning at the network level. AN - dot:89785 KW - Traffic KW - Mechanistic-empirical pavement design KW - Performance tests KW - Grading KW - Pavement performance KW - Structural analysis KW - Technology assessment KW - Asphalt KW - Databases KW - Rehabilitation LA - English PB - Tennessee. Department of Transportation PY - 2026-01-01 SN - RES2024-09 TI - Traffic Data for Network Level Pavement Structural Assessment and Performance Grade Asphalt Selection M3 - Tech Report N1 - United States N1 - RES2024-09 UR - https://rosap.ntl.bts.gov/view/dot/89785 ER -
Highway Construction Workforce Partnership: Strategic Workforce Development: Learning from the Pilot Programs – Texas

United States. Department of Transportation. Federal Highway Administration

2022-04-27 | PDF

To increase the capacity and capability of the highway construction workforce, the Highway Construction Workforce Partnership (HCWP) has partnered with key organizations to develop and deploy highway construction training and placement programs. This initiative has increased the number of individuals trained and hired in highway construction trades ...

03/30/2026

Title : Highway Construction Workforce Partnership: Strategic Workforce Development: Learning from the Pilot Programs – Texas Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Bobo, Karen;Conway, Joe;Hunziker, Kim; Published Date : 2022-04-27 URL : https://rosap.ntl.bts.gov/view/dot/89784 United States. Department of Transportation. Federal Highway Administration (2022). Highway Construction Workforce Partnership: Strategic Workforce Development: Learning from the Pilot Programs – Texas. United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Learning from the Pilot Programs – Texas" (2022) United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Learning from the Pilot Programs – Texas" , 2022 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Bobo, Karen A4 - Conway, Joe A4 - Hunziker, Kim AB - To increase the capacity and capability of the highway construction workforce, the Highway Construction Workforce Partnership (HCWP) has partnered with key organizations to develop and deploy highway construction training and placement programs. This initiative has increased the number of individuals trained and hired in highway construction trades and crafts. The Texas Department of Transportation (TxDOT) pilot yielded useful information, including metrics and lessons learned, that will help other organizations develop and launch similar programs. AN - dot:89784 KW - Education and training KW - Training KW - Road construction KW - Road construction industry KW - Transportation careers LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2022-04-27 TI - Highway Construction Workforce Partnership: Strategic Workforce Development: Learning from the Pilot Programs – Texas M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89784 ER -
Highway Construction Workforce Partnership: Strategic Workforce Development: Learning from the Pilot Programs – Idaho

United States. Department of Transportation. Federal Highway Administration

2022-04-27 | PDF

To increase the capacity and capability of the highway construction workforce, the Highway Construction Workforce Partnership (HCWP) has partnered with key organizations to develop and deploy highway construction training and placement programs. This initiative has increased the number of individuals trained and hired in highway construction trades ...

03/30/2026

Title : Highway Construction Workforce Partnership: Strategic Workforce Development: Learning from the Pilot Programs – Idaho Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Bobo, Karen;Conway, Joe;Phillips, Jessika; Published Date : 2022-04-27 URL : https://rosap.ntl.bts.gov/view/dot/89783 United States. Department of Transportation. Federal Highway Administration (2022). Highway Construction Workforce Partnership: Strategic Workforce Development: Learning from the Pilot Programs – Idaho. United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Learning from the Pilot Programs – Idaho" (2022) United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Learning from the Pilot Programs – Idaho" , 2022 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Bobo, Karen A4 - Conway, Joe A4 - Phillips, Jessika AB - To increase the capacity and capability of the highway construction workforce, the Highway Construction Workforce Partnership (HCWP) has partnered with key organizations to develop and deploy highway construction training and placement programs. This initiative has increased the number of individuals trained and hired in highway construction trades and crafts. The Idaho Transportation Department (ITD) yielded useful information, including metrics and lessons learned, that will help other organizations develop and launch similar programs. AN - dot:89783 KW - Education and training KW - Training KW - Road construction KW - Road construction industry KW - Transportation careers LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2022-04-27 TI - Highway Construction Workforce Partnership: Strategic Workforce Development: Learning from the Pilot Programs – Idaho M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89783 ER -
Highway Construction Workforce Partnership: Strategic Workforce Development: Providing Support to Launch Lasting Careers in Highway Construction

United States. Department of Transportation. Federal Highway Administration

2021-09-05 | PDF

To address the nation's shortage of highway construction workers, the U.S. Department of Transportation's Federal Highway Administration (FHWA) established the Highway Construction Workforce Partnership (HCWP). In locations like Denver, Los Angeles, and Rhode Island, working groups formed to identify, train, and place qualified individuals into ski ...

03/30/2026

Title : Highway Construction Workforce Partnership: Strategic Workforce Development: Providing Support to Launch Lasting Careers in Highway Construction Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Pavlik, Monica;Chavez, Robert;Cortes, Andrew; Published Date : 2021-09-05 URL : https://rosap.ntl.bts.gov/view/dot/89782 United States. Department of Transportation. Federal Highway Administration (2021). Highway Construction Workforce Partnership: Strategic Workforce Development: Providing Support to Launch Lasting Careers in Highway Construction. United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Providing Support to Launch Lasting Careers in Highway Construction" (2021) United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Providing Support to Launch Lasting Careers in Highway Construction" , 2021 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Pavlik, Monica A4 - Chavez, Robert A4 - Cortes, Andrew AB - To address the nation's shortage of highway construction workers, the U.S. Department of Transportation's Federal Highway Administration (FHWA) established the Highway Construction Workforce Partnership (HCWP). In locations like Denver, Los Angeles, and Rhode Island, working groups formed to identify, train, and place qualified individuals into skilled trades to fill workforce gaps. The regional HCWPs quickly learned that many individuals need additional support to launch careers that will keep the transportation industry and economy moving forward. AN - dot:89782 KW - Education and training KW - Training KW - Road construction KW - Road construction industry KW - Transportation careers LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2021-09-05 TI - Highway Construction Workforce Partnership: Strategic Workforce Development: Providing Support to Launch Lasting Careers in Highway Construction M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89782 ER -
Highway Construction Workforce Partnership: Strategic Workforce Development: Strategic Workforce Development Program Provides Female Minority Participants with Opportunities for Lasting Careers in Highway Construction

United States. Department of Transportation. Federal Highway Administration

2023-02-14 | PDF

Through its Strategic Workforce Development (SWD) Program, the Federal Highway Administration (FHWA) works with State Transportation Agencies (STAs) to bring together partners to identify, train, place, and retain women, minorities, and disadvantaged individuals into journey-level positions in the highway construction industry. The On-the-Job Train ...

03/30/2026

Title : Highway Construction Workforce Partnership: Strategic Workforce Development: Strategic Workforce Development Program Provides Female Minority Participants with Opportunities for Lasting Careers in Highway Construction Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2023-02-14 URL : https://rosap.ntl.bts.gov/view/dot/89781 United States. Department of Transportation. Federal Highway Administration (2023). Highway Construction Workforce Partnership: Strategic Workforce Development: Strategic Workforce Development Program Provides Female Minority Participants with Opportunities for Lasting Careers in Highway Construction. United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Strategic Workforce Development Program Provides Female Minority Participants with Opportunities for Lasting Careers in Highway Construction" (2023) United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Strategic Workforce Development Program Provides Female Minority Participants with Opportunities for Lasting Careers in Highway Construction" , 2023 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration AB - Through its Strategic Workforce Development (SWD) Program, the Federal Highway Administration (FHWA) works with State Transportation Agencies (STAs) to bring together partners to identify, train, place, and retain women, minorities, and disadvantaged individuals into journey-level positions in the highway construction industry. The On-the-Job Training (OJT) Program increases parity in the industry’s skilled workforce, while the OJT Supportive Services Program ensures that STAs have the resources needed to assist with trainee recruitment, childcare, transportation, personal equipment purchasing, résumé-building, employment tracking and trending, and much more. Together, these programs work to develop a skilled highway construction workforce, filling critical vacancies and laying the foundation for a strong, diverse highway construction industry for years to come. The following are a few examples of how SWD efforts in Florida, Puerto Rico, and the U.S. Virgin Islands (USVI) have provided life-changing opportunities for women who continue to advance in the highway construction workforce. AN - dot:89781 KW - Education and training KW - Training KW - Road construction KW - Road construction industry KW - Transportation careers LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2023-02-14 TI - Highway Construction Workforce Partnership: Strategic Workforce Development: Strategic Workforce Development Program Provides Female Minority Participants with Opportunities for Lasting Careers in Highway Construction M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89781 ER -
Time-Resolved Spray Characterization via Unified Optical Flow and Binarization Technique

Brien, Casey J.

;

Kang, Kyungrae

2026-03-01 | PDF

This work leverages an unsupervised machine learning and advanced image processing techniques to characterize the breakup of fuel sprays in a small-scale combustor under reacting conditions, providing valuable insights into near-nozzle flow phenomenology. The proposed methodology integrates an improved optical flow model on a convolutional neural n ...

03/30/2026

Title : Time-Resolved Spray Characterization via Unified Optical Flow and Binarization Technique Creator(s) : Brien, Casey J.;Kang, Kyungrae;Wood, Eric J.;Yoon, Joshua;Mayhew, Eric J.;Kastengren, Alan;Kweon, Chol-Bum M.;Lee, Tonghun; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;University of Illinois at Urbana-Champaign; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy Published Date : 2026-03-01 Report Number : j.fuel.2025.137433 DOI : https://doi.org/10.1016/j.fuel.2025.137433 Brien, Casey J. et al. (2026). Time-Resolved Spray Characterization via Unified Optical Flow and Binarization Technique. https://doi.org/10.1016/j.fuel.2025.137433 Brien, Casey J. et al. "Time-Resolved Spray Characterization via Unified Optical Flow and Binarization Technique" (2026), https://doi.org/10.1016/j.fuel.2025.137433 Brien, Casey J. et al. "Time-Resolved Spray Characterization via Unified Optical Flow and Binarization Technique" , 2026, https://doi.org/10.1016/j.fuel.2025.137433 Export RIS Citation Information. TY - Journal Article AU - Brien, Casey J. AU - Kang, Kyungrae AU - Wood, Eric J. AU - Yoon, Joshua AU - Mayhew, Eric J. AU - Kastengren, Alan AU - Kweon, Chol-Bum M. AU - Lee, Tonghun A2 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A2 - University of Illinois at Urbana-Champaign A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - This work leverages an unsupervised machine learning and advanced image processing techniques to characterize the breakup of fuel sprays in a small-scale combustor under reacting conditions, providing valuable insights into near-nozzle flow phenomenology. The proposed methodology integrates an improved optical flow model on a convolutional neural network to extract flow vectors with a binarization technique to assess droplets’ size and shape across the region of interest. The velocimetry approach demonstrates superior performance compared to a state-of-the-art optical flow model when applied to high-speed X-ray phase contrast spray images, achieving more accurate and reliable flow predictions. Moreover, breakup processes are quantified by breakup length and sphericity in accordance with velocity estimations, allowing a more complete characterization of the flow. This study establishes a robust methodology for analyzing spray morphology and primary breakup in compact combustors, contributing valuable means of understanding and optimizing fuel spray behavior in advanced combustion systems. AB - This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) license https://creativecommons.org/licenses/by/4.0/. Please cite this article as: Casey J. O’Brien, Kyungrae Kang, Eric J. Wood, Joshua Yoon, Eric K. Mayhew, Alan Kastengren, Chol-Bum M. Kweon, Tonghun Lee, Time-resolved spray characterization via unified optical flow and binarization technique, Fuel, Volume 407, Part C, 2026, 137433, ISSN 0016-2361, https://doi.org/10.1016/j.fuel.2025.137433. AN - dot:89780 DO - https://doi.org/10.1016/j.fuel.2025.137433 KW - Flammability KW - Chemical dispersions KW - Chemical sprays KW - Image processing KW - Machine learning KW - ASCENT LA - English PB - Elsevier PY - 2026-03-01 SN - j.fuel.2025.137433 TI - Time-Resolved Spray Characterization via Unified Optical Flow and Binarization Technique M3 - Journal Article N1 - United States N1 - 13-C-AJFE-UI-051 N1 - Open Access; https://creativecommons.org/licenses/by/4.0/ UR - https://rosap.ntl.bts.gov/view/dot/89780 ER -
Bridge Investment Program Benefit-Cost Analysis Tool — User Manual v1.1.1

Badgley, Jonathan

;

Reed, Joseph R.

2025-09-01 | PDF

This user manual is a companion to the USDOT FHWA Bridge Investment Program Benefit-Cost Analysis Tool v1.1.1. The tool was developed to assist project sponsors who apply for a Bridge Investment Program grant that requires a project benefit-cost analysis. This user manual provides instructions on how to use the tool and provides background on the t ...

03/30/2026

Title : Bridge Investment Program Benefit-Cost Analysis Tool — User Manual v1.1.1 Creator(s) : Badgley, Jonathan;Reed, Joseph R.; Corporate Creator(s) : John A. Volpe National Transportation Systems Center (U.S.) Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Asudegi, Mona Published Date : 2025-09-01 Report Number : FHWA-HIF-24-084 URL : https://rosap.ntl.bts.gov/view/dot/89779 Badgley, Jonathan and Reed, Joseph R. (2025). Bridge Investment Program Benefit-Cost Analysis Tool — User Manual v1.1.1. Badgley, Jonathan and Reed, Joseph R. "Bridge Investment Program Benefit-Cost Analysis Tool — User Manual v1.1.1" (2025) Badgley, Jonathan and Reed, Joseph R. "Bridge Investment Program Benefit-Cost Analysis Tool — User Manual v1.1.1" , 2025 Export RIS Citation Information. TY - Manual AU - Badgley, Jonathan AU - Reed, Joseph R. A2 - John A. Volpe National Transportation Systems Center (U.S.) A3 - United States. Department of Transportation. Federal Highway Administration A4 - Asudegi, Mona A4 - Asudegi, Mona AB - This user manual is a companion to the USDOT FHWA Bridge Investment Program Benefit-Cost Analysis Tool v1.1.1. The tool was developed to assist project sponsors who apply for a Bridge Investment Program grant that requires a project benefit-cost analysis. This user manual provides instructions on how to use the tool and provides background on the tool’s functionality, calculation procedures, and inputs and outputs. AN - dot:89779 KW - Investments KW - Bridges KW - Benefit cost analysis KW - Manuals LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2025-09-01 SN - FHWA-HIF-24-084 TI - Bridge Investment Program Benefit-Cost Analysis Tool — User Manual v1.1.1 M3 - Manual N1 - United States N1 - 693JJ322N300052_P00001 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89779 ER -
The Impact of Soil Erosion on Corn Yields: A Spatial Regression Analysis

Chen, Le

;

Yu, T. Edward

2026-02-01 | PDF

This study examines the impact of soil erosion on corn (Zea mays L.) yield across counties in the US Midwest. Using a novel county-level panel dataset that includes information on water erosion and corn yield, we analyze the direct and spatial spillover effects of erosion using a spatial regression framework. We find that increases in soil erosion ...

03/30/2026

Title : The Impact of Soil Erosion on Corn Yields: A Spatial Regression Analysis Creator(s) : Chen, Le;Yu, T. Edward;Williams, Hannah; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;University of Tennessee, Knoxville; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy Published Date : 2026-02-01 Report Number : agg2.70304 DOI : https://doi.org/10.1002/agg2.70304 Chen, Le et al. (2026). The Impact of Soil Erosion on Corn Yields: A Spatial Regression Analysis. https://doi.org/10.1002/agg2.70304 Chen, Le and Yu, T. Edward and Williams, Hannah "The Impact of Soil Erosion on Corn Yields: A Spatial Regression Analysis" (2026), https://doi.org/10.1002/agg2.70304 Chen, Le et al. "The Impact of Soil Erosion on Corn Yields: A Spatial Regression Analysis" , 2026, https://doi.org/10.1002/agg2.70304 Export RIS Citation Information. TY - Journal Article AU - Chen, Le AU - Yu, T. Edward AU - Williams, Hannah A2 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A2 - University of Tennessee, Knoxville A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - This study examines the impact of soil erosion on corn (Zea mays L.) yield across counties in the US Midwest. Using a novel county-level panel dataset that includes information on water erosion and corn yield, we analyze the direct and spatial spillover effects of erosion using a spatial regression framework. We find that increases in soil erosion have a statistically significant negative impact on corn yield. In addition, we find evidence of significant spatial spillover effects, indicating that erosion in one county can adversely affect agricultural productivity in surrounding areas. These findings confirm that the negative effects of soil erosion extend beyond the site of origin and are spatially diffused across regions. This study provides new empirical evidence on the broader yield-related consequences of soil erosion and highlights the importance of landscape-level conservation strategies to mitigate its long-term agricultural impacts. AB - This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) license https://creativecommons.org/licenses/by/4.0/. Please cite this article as: Chen, L., Yu, T. E., & Williams, H. (2026). The impact of soil erosion on corn yields: A spatial regression analysis. Agrosystems, Geosciences & Environment, 9, e70304. https://doi.org/10.1002/agg2.70304 AN - dot:89778 DO - https://doi.org/10.1002/agg2.70304 KW - Soils KW - Erosion control KW - Soil conservation KW - Data collection KW - Wind erosion KW - ASCENT LA - English PB - Wiley Periodicals LLC PY - 2026-02-01 SN - agg2.70304 TI - The Impact of Soil Erosion on Corn Yields: A Spatial Regression Analysis M3 - Journal Article N1 - United States N1 - 13-C-AJFE-UTENN-025 N1 - Open Access; https://creativecommons.org/licenses/by/4.0/ UR - https://rosap.ntl.bts.gov/view/dot/89778 ER -
Cycling Past 50: A Closer Look Into the World of Older Cyclists, Year 5 Survey [Research Brief]

Kachadoorian, Carol

2026-03-01 | PDF

This report provides information on 2700 older adults who cycle and answered the 50+ Cycling Survey, Year 5. Taken as a whole, these responses provide a rich set of information about older cyclists – when and where they cycle, why they cycle, and importantly, how cycling contributes to their mobility, social connections, and wellness often. The ana ...

03/30/2026

Title : Cycling Past 50: A Closer Look Into the World of Older Cyclists, Year 5 Survey [Research Brief] Creator(s) : Kachadoorian, Carol Corporate Creator(s) : San Jose State University. College of Business. Mineta Transportation Institute Corporate Contributor(s) : United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2026-03-01 URL : https://rosap.ntl.bts.gov/view/dot/89777 Kachadoorian, Carol (2026). Cycling Past 50: A Closer Look Into the World of Older Cyclists, Year 5 Survey [Research Brief]. Kachadoorian, Carol "Cycling Past 50: A Closer Look Into the World of Older Cyclists, Year 5 Survey [Research Brief]" (2026) Kachadoorian, Carol "Cycling Past 50: A Closer Look Into the World of Older Cyclists, Year 5 Survey [Research Brief]" , 2026 Export RIS Citation Information. TY - Brief AU - Kachadoorian, Carol A2 - San Jose State University. College of Business. Mineta Transportation Institute A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - This report provides information on 2700 older adults who cycle and answered the 50+ Cycling Survey, Year 5. Taken as a whole, these responses provide a rich set of information about older cyclists – when and where they cycle, why they cycle, and importantly, how cycling contributes to their mobility, social connections, and wellness often. The analysis shows that cycling remains beneficial for older adults. It contributes to their physical and mental well-being and offers mobility independence regardless of their ability to continue driving a motor vehicle. Thus, the analysis in this report can be used by transportation planners and engineers, public health professionals, those working on physical activity and wellness for older adults, cycling and aging policy advocates, and older adults themselves and their families to understand the habits and needs of this population. AN - dot:89777 ET - Research Brief KW - Aged KW - Bicycling KW - Mobility KW - Biological aging KW - Infrastructure KW - Bicycle crashes KW - Built environment KW - COVID-19 KW - Cyclists KW - Demographics KW - Falls KW - Surveys KW - Transportation equity KW - Gender LA - English PB - San Jose State University. College of Business. Mineta Transportation Institute PY - 2026-03-01 TI - Cycling Past 50: A Closer Look Into the World of Older Cyclists, Year 5 Survey [Research Brief] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89777 ER -
What Holds High-Speed Rail Back: Lessons From Global Systems and California’s Experience

Sharma, Deepak K. ;

Lekhi, Rajnish

2026-03-01 | PDF

This report examines benefits and challenges of integrating California High-Speed Rail (CHSR) with other rail systems and reviews California legislation impacting HSR’s contracting and financing alternatives. The research compares CHSR with high-speed rail systems around the world to identify similarities and differences in costs, speeds, ridership ...

03/30/2026

Title : What Holds High-Speed Rail Back: Lessons From Global Systems and California’s Experience Creator(s) : Sharma, Deepak K.;Lekhi, Rajnish;Parr, Scott A.; Corporate Creator(s) : San Jose State University. College of Business. Mineta Transportation Institute;California State University, Fullerton; Corporate Contributor(s) : State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology;United States. Department of Transportation. University Transportation Centers (UTC) Program; Published Date : 2026-03-01 Report Number : 26-03 DOI : https://doi.org/10.31979/mti.2026.2470 Sharma, Deepak K. et al. (2026). What Holds High-Speed Rail Back: Lessons From Global Systems and California’s Experience. https://doi.org/10.31979/mti.2026.2470 Sharma, Deepak K. and Lekhi, Rajnish and Parr, Scott A. "What Holds High-Speed Rail Back: Lessons From Global Systems and California’s Experience" (2026), https://doi.org/10.31979/mti.2026.2470 Sharma, Deepak K. et al. "What Holds High-Speed Rail Back: Lessons From Global Systems and California’s Experience" , 2026, https://doi.org/10.31979/mti.2026.2470 Export RIS Citation Information. TY - Tech Report AU - Sharma, Deepak K. AU - Lekhi, Rajnish AU - Parr, Scott A. A2 - San Jose State University. College of Business. Mineta Transportation Institute A2 - California State University, Fullerton A3 - State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program AB - This report examines benefits and challenges of integrating California High-Speed Rail (CHSR) with other rail systems and reviews California legislation impacting HSR’s contracting and financing alternatives. The research compares CHSR with high-speed rail systems around the world to identify similarities and differences in costs, speeds, ridership, and operating conditions. It also reviews Japan’s Land Readjustment Act as a model for value capture and land assembly and explores international experiences on rail integration, along with U.S. cases from the East Coast and Los Angeles. A review of California’s transportation legislation highlights how laws for highways and bridges differ from those for HSR. The study uses a database of oversight reports and legislative documents to identify recurring challenges such as funding shortfalls, permitting, cost escalation, and right-of-way acquisition. Semi-structured interviews with subject matter experts further highlight legal, financial, and project delivery issues. The study concludes that stable funding, early resolution of land and environmental issues, streamlined permitting, and better coordination across agencies are necessary for future HSR projects. Recommendations include creating stronger partnerships with third parties, adopting value capture, crowdsource financing, and reforms to eminent domain and permitting processes. This research demonstrates that effective rail integration is a governance and policy imperative critical to building a connected, sustainable, and economically competitive California. AN - dot:89776 DO - https://doi.org/10.31979/mti.2026.2470 KW - High speed rail KW - Passenger trains KW - Railroad transportation KW - Lessons learned KW - Property acquisition KW - Interviewing KW - Land KW - Financing KW - Bridges KW - Highways KW - Costs KW - Legislation LA - English PB - San Jose State University. College of Business. Mineta Transportation Institute PY - 2026-03-01 SN - 26-03 TI - What Holds High-Speed Rail Back: Lessons From Global Systems and California’s Experience M3 - Tech Report N1 - United States N1 - SB1-SJAUX_2023-26 UR - https://rosap.ntl.bts.gov/view/dot/89776 ER -
High‐Speed Rail Feasibility Study Business Plan

Transportation Economics & Management Systems, Inc (TEMS) ...

2010-03-01 | PDF

This report evaluates the feasibility of developing a high-speed intercity passenger rail system in Colorado, centered on the I-25 corridor from Fort Collins to Trinidad and the I-70 corridor from Denver International Airport to Grand Junction, with additional links to major mountain and resort communities. Prepared for the Rocky Mountain Rail Auth ...

03/30/2026

Title : High‐Speed Rail Feasibility Study Business Plan Corporate Creator(s) : Transportation Economics & Management Systems, Inc (TEMS);Quandel Consultants, LLC;GBSM, Inc; Corporate Contributor(s) : Rocky Mountain Rail Authority Published Date : 2010-03-01 URL : https://rosap.ntl.bts.gov/view/dot/89775 Transportation Economics & Management Systems, Inc (TEMS) (2010). High‐Speed Rail Feasibility Study Business Plan. Transportation Economics & Management Systems, Inc (TEMS) "High‐Speed Rail Feasibility Study Business Plan" (2010) Transportation Economics & Management Systems, Inc (TEMS) "High‐Speed Rail Feasibility Study Business Plan" , 2010 Export RIS Citation Information. TY - Tech Report A2 - Transportation Economics & Management Systems, Inc (TEMS) A2 - Quandel Consultants, LLC A2 - GBSM, Inc A3 - Rocky Mountain Rail Authority AB - This report evaluates the feasibility of developing a high-speed intercity passenger rail system in Colorado, centered on the I-25 corridor from Fort Collins to Trinidad and the I-70 corridor from Denver International Airport to Grand Junction, with additional links to major mountain and resort communities. Prepared for the Rocky Mountain Rail Authority using Federal Railroad Administration criteria for corridor designation and funding eligibility, the study applies a six-step business planning process that integrates public outreach, service scenario development, engineering analysis, demand forecasting, cost estimation, institutional planning, and implementation strategy. AB - The analysis finds that Colorado’s intercity travel demand is concentrated heavily in the I-25 and I-70 corridors, where automobile travel dominates and existing intercity rail, air, and bus services play smaller roles. The study concludes that these corridors have sufficient travel density to support high-speed passenger service, particularly when the two corridors are connected to provide direct, interoperable service and a single-seat ride between Front Range communities, Denver International Airport, and mountain destinations. Because diesel equipment was excluded early from I-70 due to steep mountain grades, the study focused there on electric rail and maglev technologies; for interoperability with I-70, electric rail and maglev options were also developed for I-25. AB - Representative route and technology options were developed for both corridors, including existing rail, greenfield alignments, electric multiple unit rail, and maglev concepts across a range of operating speeds. In the I-70 corridor, the study found that the high-gradient 7 percent right-of-way alignment was suitable only for EMU rail or maglev vehicles, while lower-gradient alternatives improved system performance but often at higher infrastructure cost. Although maglev was found to offer the highest ridership and strongest operating ratios among evaluated alternatives, it was also found to require significantly greater capital investment than rail. Overall, the study concluded that several alternatives were financially and economically feasible, but the 220-mph electric rail option achieved the strongest economic feasibility score and was therefore selected for more detailed evaluation as the FRA Developed Option. AB - The report ultimately concludes that high-speed transportation corridors paralleling Colorado’s two principal interstate corridors are feasible, while also emphasizing that route refinement, gradient reduction, tunneling needs, institutional coordination, and funding strategy remain critical to implementation. AB - Cite as: Transportation Economics & Management Systems, Inc., Quandel Consultants, LLC, & GBSM, Inc. (2010, March). High-speed rail feasibility study business plan. Rocky Mountain Rail Authority. AN - dot:89775 KW - High speed rail KW - Feasibility analysis KW - Business models KW - Rail transit LA - English PB - Rocky Mountain Rail Authority PY - 2010-03-01 TI - High‐Speed Rail Feasibility Study Business Plan M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89775 ER -
Virtual Open Innovation Collaborative Environment for Safety (VOICES) Distributed Testing Pilot Test 2

Loughran, Andrew ;

Chou, Danielle

2026-03-01 | PDF

This report documents the results and technical performance analysis of the distributed testing pilot test 2 (Pilot 2) for the FHWA Virtual Open Innovation Collaborative Environment for Safety (VOICES) project. This pilot connected multiple test sites over a secure network and demonstrated how different models and simulation platforms can cosimulat ...

03/30/2026

Title : Virtual Open Innovation Collaborative Environment for Safety (VOICES) Distributed Testing Pilot Test 2 Creator(s) : Loughran, Andrew;Chou, Danielle;Laqui, Robin; Corporate Creator(s) : Leidos Corporate Contributor(s) : United States. Federal Highway Administration. Office of Safety and Operations Research and Development;United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center; Published Date : 2026-03-01 Report Number : FHWA-HRT-25-053 DOI : https://doi.org/10.21949/1521554 Loughran, Andrew et al. (2026). Virtual Open Innovation Collaborative Environment for Safety (VOICES) Distributed Testing Pilot Test 2. https://doi.org/10.21949/1521554 Loughran, Andrew and Chou, Danielle and Laqui, Robin "Virtual Open Innovation Collaborative Environment for Safety (VOICES) Distributed Testing Pilot Test 2" (2026), https://doi.org/10.21949/1521554 Loughran, Andrew et al. "Virtual Open Innovation Collaborative Environment for Safety (VOICES) Distributed Testing Pilot Test 2" , 2026, https://doi.org/10.21949/1521554 Export RIS Citation Information. TY - Tech Report AU - Loughran, Andrew AU - Chou, Danielle AU - Laqui, Robin A2 - Leidos A3 - United States. Federal Highway Administration. Office of Safety and Operations Research and Development A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center A4 - Chou, Danielle AB - This report documents the results and technical performance analysis of the distributed testing pilot test 2 (Pilot 2) for the FHWA Virtual Open Innovation Collaborative Environment for Safety (VOICES) project. This pilot connected multiple test sites over a secure network and demonstrated how different models and simulation platforms can cosimulate together. This testing showcased how distributed testing can potentially improve the technical maturity of different applications and help ensure that algorithms and software from a variety of sources can work together safely to answer research questions important to the government, industry, and academia. AN - dot:89774 DO - https://doi.org/10.21949/1521554 ET - Technical Report KW - Virtual reality KW - Traffic safety KW - Automation KW - Traffic simulation LA - English PB - United States. Federal Highway Administration. Office of Safety and Operations Research and Development PY - 2026-03-01 SN - FHWA-HRT-25-053 TI - Virtual Open Innovation Collaborative Environment for Safety (VOICES) Distributed Testing Pilot Test 2 M3 - Tech Report N1 - United States N1 - 693JJ321D000010 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89774 ER -
Water Spray as a Fire Suppression Agent for Aircraft Cargo Compartment Fires

Marker, Timothy R. ;

Reinhardt, John

2001-06-01 | PDF

This report describes full-scale fire tests conducted by the Federal Aviation Administration (FAA) to investigate the effectiveness of several types of water spray systems against in-flight cargo compartment fires. Currently, commercial transport cargo compartments are protected with Halon 1301 fire suppression systems. Water spray is being conside ...

03/30/2026

Title : Water Spray as a Fire Suppression Agent for Aircraft Cargo Compartment Fires Creator(s) : Marker, Timothy R.;Reinhardt, John; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 2001-06-01 Report Number : DOT/FAA/AR-TN01/1 URL : https://rosap.ntl.bts.gov/view/dot/89773 Marker, Timothy R. and Reinhardt, John (2001). Water Spray as a Fire Suppression Agent for Aircraft Cargo Compartment Fires. Marker, Timothy R. and Reinhardt, John "Water Spray as a Fire Suppression Agent for Aircraft Cargo Compartment Fires" (2001) Marker, Timothy R. and Reinhardt, John "Water Spray as a Fire Suppression Agent for Aircraft Cargo Compartment Fires" , 2001 Export RIS Citation Information. TY - Tech Report AU - Marker, Timothy R. AU - Reinhardt, John A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - This report describes full-scale fire tests conducted by the Federal Aviation Administration (FAA) to investigate the effectiveness of several types of water spray systems against in-flight cargo compartment fires. Currently, commercial transport cargo compartments are protected with Halon 1301 fire suppression systems. Water spray is being considered as an alternative agent for Halon 1301 which is no longer being produced because of its ozone depletion potential. A dual-fluid (air/water) nozzle system, two types of high-pressure, single-fluid design systems, and a second dual-fluid (water/nitrogen) nozzle system were evaluated. The in-flight fire scenarios included simulated bulk-loaded fires, containerized fires, flammable liquid fires, and aerosol can explosions. The majority of tests were conducted inside a wide-body DC-10 cargo compartment; additional tests were conducted in a B727 narrow-body compartment. Several tests utilizing one of the high-pressure, single-fluid design systems were conducted according to the Minimum Performance Standard (MPS) for aircraft cargo compartments which standardizes and specifies the fire test performance for halon replacement agents. Parameters such as activation temperature, spray duration, nozzle configuration, and flow rate were varied during the tests to determine the impact on water usage and suppression. The tests determined that the systems were capable of suppressing class-A and class-B cargo fires for extended periods, using varying amounts of water. Water spray systems require additional development and evaluation to become a viable replacement for Halon 1301 because of the weight (agent) penalty associated with the systems tested. Also, the capability of water spray against cargo fires involving aerosol cans needs further investigation. AN - dot:89773 ET - Technical Note KW - Aircraft KW - Cargo compartments KW - Fire extinguishers KW - Fire extinguishing agents KW - Suppressors KW - Water LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2001-06-01 SN - DOT/FAA/AR-TN01/1 TI - Water Spray as a Fire Suppression Agent for Aircraft Cargo Compartment Fires M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89773 ER -
Project 030 National Jet Fuels Combustion Program – Area #6: Referee Swirl-Stabilized Combustor Evaluation and Support

Zabarnick, Steven ;

Lee, Tonghun

2015-11-01 | PDF

This project will develop, conduct, and analyze combustion experiments for alternative jet fuels in the National Jet Fuel Combustion Program’s referee combustor. The effort involves rig testing of combustion parameters as well as implementation of advanced laser and optical measurements in the referee combustor to provide insight into details of th ...

03/30/2026

Title : Project 030 National Jet Fuels Combustion Program – Area #6: Referee Swirl-Stabilized Combustor Evaluation and Support Creator(s) : Zabarnick, Steven;Lee, Tonghun;Stouffer, Scott;Dewitt, Matthew;Hendershott, Tyler;Monfort, Jeffery;Mayhew, Eric;Rajasegar, Rajavasanth;Hammack, Stephen; Corporate Creator(s) : University of Dayton. Research Institute;University of Illinois at Urbana-Champaign; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment Published Date : 2015-11-01 URL : https://rosap.ntl.bts.gov/view/dot/89772 Zabarnick, Steven et al. (2015). Project 030 National Jet Fuels Combustion Program – Area #6: Referee Swirl-Stabilized Combustor Evaluation and Support. Zabarnick, Steven et al. "Project 030 National Jet Fuels Combustion Program – Area #6: Referee Swirl-Stabilized Combustor Evaluation and Support" (2015) Zabarnick, Steven et al. "Project 030 National Jet Fuels Combustion Program – Area #6: Referee Swirl-Stabilized Combustor Evaluation and Support" , 2015 Export RIS Citation Information. TY - Tech Report AU - Zabarnick, Steven AU - Lee, Tonghun AU - Stouffer, Scott AU - Dewitt, Matthew AU - Hendershott, Tyler AU - Monfort, Jeffery AU - Mayhew, Eric AU - Rajasegar, Rajavasanth AU - Hammack, Stephen A2 - University of Dayton. Research Institute A2 - University of Illinois at Urbana-Champaign A3 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment AB - This project will develop, conduct, and analyze combustion experiments for alternative jet fuels in the National Jet Fuel Combustion Program’s referee combustor. The effort involves rig testing of combustion parameters as well as implementation of advanced laser and optical measurements in the referee combustor to provide insight into details of the combustion process and provide data for new predictive combustion models under ASCENT Project 028. The goal of this research is to simplify alternative fuel certification procedures by reducing the need for full-scale engine testing. It is part of the National Jet Fuels Combustion Program and will satisfy Area #6, Referee Swirl-Stabilized Combustor Evaluation and Support. AN - dot:89772 KW - Combustion KW - Jet engine fuels KW - Evaluation KW - Alternate fuels LA - English PB - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment PY - 2015-11-01 TI - Project 030 National Jet Fuels Combustion Program – Area #6: Referee Swirl-Stabilized Combustor Evaluation and Support M3 - Tech Report N1 - United States N1 - 13-C-AJFE-UD-002 UR - https://rosap.ntl.bts.gov/view/dot/89772 ER -
Project 28, Area 4: Combustion Model Development and Evaluation

Menon, Suresh ;

Sun, Wenting

2017-12-01 | PDF

This project is developing computational tools needed to evaluate alternate fuel combustion in a spray combustion system. The configuration chosen for final study is a subscale Referee combustor designed to investigate lean blow out (LBO) as a function of alternate fuel properties. The computational task requires development of reduced reaction kin ...

03/30/2026

Title : Project 28, Area 4: Combustion Model Development and Evaluation Creator(s) : Menon, Suresh;Sun, Wenting;Lu, Tianfeng;Panchal, A.;Yang, Suo;Gao, Xiang;Gao, Yang;Park, Ji-Woong; Corporate Creator(s) : Georgia Institute of Technology. School of Aerospace Engineering Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy; Published Date : 2017-12-01 URL : https://rosap.ntl.bts.gov/view/dot/89771 Menon, Suresh et al. (2017). Project 28, Area 4: Combustion Model Development and Evaluation. Menon, Suresh et al. "Project 28, Area 4: Combustion Model Development and Evaluation" (2017) Menon, Suresh et al. "Project 28, Area 4: Combustion Model Development and Evaluation" , 2017 Export RIS Citation Information. TY - Tech Report AU - Menon, Suresh AU - Sun, Wenting AU - Lu, Tianfeng AU - Panchal, A. AU - Yang, Suo AU - Gao, Xiang AU - Gao, Yang AU - Park, Ji-Woong A2 - Georgia Institute of Technology. School of Aerospace Engineering A3 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - This project is developing computational tools needed to evaluate alternate fuel combustion in a spray combustion system. The configuration chosen for final study is a subscale Referee combustor designed to investigate lean blow out (LBO) as a function of alternate fuel properties. The computational task requires development of reduced reaction kinetics for these fuels, spray fuel properties and integration into a large-eddy simulation (LES) solver. This project developed a reduced reaction kinetic model and investigated techniques for kinetics acceleration and then applied these models into an LES solver model. The Referee rig is simulated for 3 different fuels for both near blow out (NBO) and LBO. Analysis of the simulations identified critical needs for proper boundary conditions characterization and inclusion of multi-component fuel properties. Although later studies were funded by NASA (in Years 2-3), the initial study under this project demonstrated the viability of LES to study such fuel dependent kinetics in a complex gas turbine combustor. AN - dot:89771 KW - Combustion KW - Evaluation and assessment KW - Alternate fuels KW - Simulation KW - ASCENT LA - English PB - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment PY - 2017-12-01 TI - Project 28, Area 4: Combustion Model Development and Evaluation M3 - Tech Report N1 - United States N1 - 13-C-AJFE-GIT-028 UR - https://rosap.ntl.bts.gov/view/dot/89771 ER -
Project 034 National Jet Fuels Combustion Program – Area #7: Overall Program Integration and Analysis

Heyne, Joshua

;

Stouffer, Scott

2023-02-01 | PDF

This project involved coordination between dozens of researchers and stakeholders from several different countries relating to the influence of jet fuel variation on sprays and combustion operability including ignition and lean blowout, and the models required to anticipate combustor performance. The models included chemical kinetic models of the c ...

03/30/2026

Title : Project 034 National Jet Fuels Combustion Program – Area #7: Overall Program Integration and Analysis Creator(s) : Heyne, Joshua;Stouffer, Scott;Briones, Alejandro;Sankaran, Vaidya;Olding, Bob;Hanchak, Mike;Stachler, Robert;Hendershott, Tyler;Monfort, Jeffery;Peiffer, Erin;Carson, Jeremy;Opacich, Katherine;Colborn, Jen;Kosir, Shane;Yang, Zhibin;Bell, David;Alexander, Sherri;Boehm, Randall; Corporate Creator(s) : University of Dayton. Research Institute Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment Published Date : 2023-02-01 URL : https://rosap.ntl.bts.gov/view/dot/89770 Heyne, Joshua et al. (2023). Project 034 National Jet Fuels Combustion Program – Area #7: Overall Program Integration and Analysis. Heyne, Joshua et al. "Project 034 National Jet Fuels Combustion Program – Area #7: Overall Program Integration and Analysis" (2023) Heyne, Joshua et al. "Project 034 National Jet Fuels Combustion Program – Area #7: Overall Program Integration and Analysis" , 2023 Export RIS Citation Information. TY - Tech Report AU - Heyne, Joshua AU - Stouffer, Scott AU - Briones, Alejandro AU - Sankaran, Vaidya AU - Olding, Bob AU - Hanchak, Mike AU - Stachler, Robert AU - Hendershott, Tyler AU - Monfort, Jeffery AU - Peiffer, Erin AU - Carson, Jeremy AU - Opacich, Katherine AU - Colborn, Jen AU - Kosir, Shane AU - Yang, Zhibin AU - Bell, David AU - Alexander, Sherri AU - Boehm, Randall A2 - University of Dayton. Research Institute A3 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment AB - This project involved coordination between dozens of researchers and stakeholders from several different countries relating to the influence of jet fuel variation on sprays and combustion operability including ignition and lean blowout, and the models required to anticipate combustor performance. The models included chemical kinetic models of the combustion phenomenon, various models of spray involving different levels empirical input or model sophistication, and several sub-models employed within computational fluid dynamics simulations. A clear deliverable of the National Jet Fuels Combustion Program was to package the models developed under the program into applications that could be used by combustor design teams working at each of the major jet engine manufacturers, who were each represented on the team. Overall, the NJFCP resulted in hundreds of publications within archival sources, including six with authorship contribution from the principal of this project. The crowning document marking the achievement of this project was the book cited here: Colket, M., & Heyne, J. (2021). Fuel effects on operability of aircraft gas turbine combustors. American Institute of Aeronautics and Astronautics. https://doi.org/10.2514/4.106040 AN - dot:89770 KW - Combustion KW - Jet engine fuels KW - Programming (Planning) KW - Program management KW - Aviation KW - ASCENT LA - English PB - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment PY - 2023-02-01 TI - Project 034 National Jet Fuels Combustion Program – Area #7: Overall Program Integration and Analysis M3 - Tech Report N1 - United States N1 - 13-C-AJFE-UD-4, 9, 10, 13, 17, 18, 24 UR - https://rosap.ntl.bts.gov/view/dot/89770 ER -
Pacific Northwest Rail Corridor: Success Through Partnerships

Uznanski, Ken

2002-10-15 | PDF

This presentation examines the Pacific Northwest Rail Corridor as a regional passenger rail initiative built through partnerships among public agencies, rail operators, and private stakeholders. It highlights continued Amtrak Cascades ridership growth, strong customer satisfaction, and ongoing capital improvements across multiple corridor segments. ...

03/30/2026

Title : Pacific Northwest Rail Corridor: Success Through Partnerships Creator(s) : Uznanski, Ken Corporate Creator(s) : Washington State Department of Transportation Published Date : 2002-10-15 URL : https://rosap.ntl.bts.gov/view/dot/89769 Uznanski, Ken (2002). Pacific Northwest Rail Corridor: Success Through Partnerships. Uznanski, Ken "Pacific Northwest Rail Corridor: Success Through Partnerships" (2002) Uznanski, Ken "Pacific Northwest Rail Corridor: Success Through Partnerships" , 2002 Export RIS Citation Information. TY - Presentations AU - Uznanski, Ken A2 - Washington State Department of Transportation AB - This presentation examines the Pacific Northwest Rail Corridor as a regional passenger rail initiative built through partnerships among public agencies, rail operators, and private stakeholders. It highlights continued Amtrak Cascades ridership growth, strong customer satisfaction, and ongoing capital improvements across multiple corridor segments. The presentation also identifies King Street Station as a critical redevelopment and capacity issue shaped by legal, historic, and operational constraints. Overall, it argues that continued corridor expansion depends on coordinated investment, institutional cooperation, and sustained public funding. AB - Cite as: Uznanski, K. (2002, October 15). Pacific Northwest Rail Corridor: Success through partnerships [Conference presentation]. Passenger Trains on Freight Railroads, Washington, DC. AN - dot:89769 KW - Railroad transportation KW - Transportation corridors KW - Partnerships KW - Passengers KW - Railroad travel KW - Travel demand KW - Capital investments LA - English PB - Washington State Department of Transportation PY - 2002-10-15 TI - Pacific Northwest Rail Corridor: Success Through Partnerships M3 - Presentations N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89769 ER -
Excellence in Highway Safety Data Awards [2026 Postcard Update]

United States. Department of Transportation. Federal Highway Administration

2026-03-01 | PDF

This postcard is to announce the Excellence in Highway Safety Data Awards Student Contest 2026. The intended audience is all undergraduate, graduate, and community college students with a passion for impactful research and data analysis.

03/30/2026

Title : Excellence in Highway Safety Data Awards [2026 Postcard Update] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Published Date : 2026-03-01 Report Number : FHWA-HRT-26-041 DOI : https://doi.org/10.21949/ev8q-k010 United States. Department of Transportation. Federal Highway Administration (2026). Excellence in Highway Safety Data Awards [2026 Postcard Update]. https://doi.org/10.21949/ev8q-k010 United States. Department of Transportation. Federal Highway Administration "Excellence in Highway Safety Data Awards [2026 Postcard Update]" (2026), https://doi.org/10.21949/ev8q-k010 United States. Department of Transportation. Federal Highway Administration "Excellence in Highway Safety Data Awards [2026 Postcard Update]" , 2026, https://doi.org/10.21949/ev8q-k010 Export RIS Citation Information. TY - Other A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center AB - This postcard is to announce the Excellence in Highway Safety Data Awards Student Contest 2026. The intended audience is all undergraduate, graduate, and community college students with a passion for impactful research and data analysis. AN - dot:89768 DO - https://doi.org/10.21949/ev8q-k010 KW - Highway safety KW - Data KW - Awards LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2026-03-01 SN - FHWA-HRT-26-041 TI - Excellence in Highway Safety Data Awards [2026 Postcard Update] M3 - Other N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89768 ER -
Cooperative Automation Driving System (C-ADS) with Road Weather Management (RWM) with a Lane Closure [2026]

United States. Department of Transportation. Federal Highway Administration

2026-02-01 | PDF

This fact sheet highlights the Cooperative Automation Driving System (C-ADS) with Road Weather Management (RWM) with a Lane Closure. The RWM Program seeks to develop and promote effective tools to observe and predict the impacts of weather on the roads and to alleviate those impacts. The program pursues the following objectives: Develop a national, ...

03/30/2026

Title : Cooperative Automation Driving System (C-ADS) with Road Weather Management (RWM) with a Lane Closure [2026] Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center Published Date : 2026-02-01 Report Number : FHWA-HRT-25-091 DOI : https://doi.org/10.21949/v8v1-8m02 United States. Department of Transportation. Federal Highway Administration (2026). Cooperative Automation Driving System (C-ADS) with Road Weather Management (RWM) with a Lane Closure [2026]. https://doi.org/10.21949/v8v1-8m02 United States. Department of Transportation. Federal Highway Administration "Cooperative Automation Driving System (C-ADS) with Road Weather Management (RWM) with a Lane Closure [2026]" (2026), https://doi.org/10.21949/v8v1-8m02 United States. Department of Transportation. Federal Highway Administration "Cooperative Automation Driving System (C-ADS) with Road Weather Management (RWM) with a Lane Closure [2026]" , 2026, https://doi.org/10.21949/v8v1-8m02 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center AB - This fact sheet highlights the Cooperative Automation Driving System (C-ADS) with Road Weather Management (RWM) with a Lane Closure. The RWM Program seeks to develop and promote effective tools to observe and predict the impacts of weather on the roads and to alleviate those impacts. The program pursues the following objectives: Develop a national, open observing system that promotes data sharing to support weather observation and forecasting and transportation operations. Develop resources and training methods to assist State and local partners in the deployment of weather management tools. Advance the state of the practice by developing proactive solutions and disseminating information on adverse weather. Foster a collaborative, comprehensive, and dedicated surface transportation weather research program. AN - dot:89767 DO - https://doi.org/10.21949/v8v1-8m02 KW - Road weather information systems KW - Lane closure KW - Data sharing KW - Ground transportation LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2026-02-01 SN - FHWA-HRT-25-091 TI - Cooperative Automation Driving System (C-ADS) with Road Weather Management (RWM) with a Lane Closure [2026] M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89767 ER -
High‐Speed Rail Feasibility Study Executive Summary

Transportation Economics & Management Systems, Inc (TEMS) ...

2010-03-01 | PDF

This executive summary finds that high-speed rail is feasible in Colorado under Federal Railroad Administration criteria, focusing on the state’s two principal corridors: I-25 from Fort Collins to Pueblo and I-70 from Denver International Airport to Eagle County Airport. It evaluates highway, greenfield, and existing rail alignments and compares di ...

03/30/2026

Title : High‐Speed Rail Feasibility Study Executive Summary Corporate Creator(s) : Transportation Economics & Management Systems, Inc (TEMS);Quandel Consultants, LLC;GBSM, Inc; Corporate Contributor(s) : Rocky Mountain Rail Authority Published Date : 2010-03-01 URL : https://rosap.ntl.bts.gov/view/dot/89766 Transportation Economics & Management Systems, Inc (TEMS) (2010). High‐Speed Rail Feasibility Study Executive Summary. Transportation Economics & Management Systems, Inc (TEMS) "High‐Speed Rail Feasibility Study Executive Summary" (2010) Transportation Economics & Management Systems, Inc (TEMS) "High‐Speed Rail Feasibility Study Executive Summary" , 2010 Export RIS Citation Information. TY - Tech Report A2 - Transportation Economics & Management Systems, Inc (TEMS) A2 - Quandel Consultants, LLC A2 - GBSM, Inc A3 - Rocky Mountain Rail Authority AB - This executive summary finds that high-speed rail is feasible in Colorado under Federal Railroad Administration criteria, focusing on the state’s two principal corridors: I-25 from Fort Collins to Pueblo and I-70 from Denver International Airport to Eagle County Airport. It evaluates highway, greenfield, and existing rail alignments and compares diesel, electric rail, and magnetic levitation technologies across a range of service concepts. AB - The summary concludes that Colorado’s combination of Front Range population density and mountain tourism creates a viable high-speed rail market, but that full-system concepts were not feasible until the analysis was narrowed to core segments and mixed-technology options. That process yielded eight feasible alternatives. Although maglev was evaluated, especially for the steeper I-70 corridor, the selected FRA Developed Option was a 220-mph very high-speed electric train on the I-70 highway right-of-way and I-25 unconstrained routes because it produced the strongest overall operating and cost-benefit performance. AB - The study concluded that I-25 alone could support a 110-mph diesel service, but when linked to the I-70 DIA–Eagle corridor, the combined system could support 220-mph electric rail. The article further emphasized that the I-70 corridor remained the key engineering challenge because of multiple 7 percent grades, while ridership in both corridors was strong enough to support frequent service and the overall implementation period was estimated at 12 to 15 years. AB - Overall, the executive summary presents high-speed rail as a significant long-term transportation and economic development opportunity for Colorado, while making clear that further corridor refinement, environmental review, and implementation planning would still be required. AB - Cite as: Transportation Economics & Management Systems, Inc., Quandel Consultants, LLC, & GBSM Inc. (2010, March). High-speed rail feasibility study: Executive summary. Rocky Mountain Rail Authority. AN - dot:89766 KW - High speed rail KW - Feasibility analysis KW - Business models KW - Rail transit LA - English PB - Rocky Mountain Rail Authority PY - 2010-03-01 TI - High‐Speed Rail Feasibility Study Executive Summary M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89766 ER -
Cycling Past 50: A Closer Look into the World of Older Cyclists, Year 5 Survey

Kachadoorian, Carol

2026-03-01 | PDF

This document reports on approximately 2,800 responses to a North American survey of older adults who cycle. The survey, open from March 2024 through February 2025, included questions that captured a person’s cycling over their life course, as well as their current cycling styles, habits, and preferences. Responses reflect the impact of various fac ...

03/30/2026

Title : Cycling Past 50: A Closer Look into the World of Older Cyclists, Year 5 Survey Creator(s) : Kachadoorian, Carol Corporate Creator(s) : San Jose State University. College of Business. Mineta Transportation Institute Corporate Contributor(s) : United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2026-03-01 Report Number : 26-02 DOI : https://doi.org/10.31979/mti.2026.2443 Kachadoorian, Carol (2026). Cycling Past 50: A Closer Look into the World of Older Cyclists, Year 5 Survey. https://doi.org/10.31979/mti.2026.2443 Kachadoorian, Carol "Cycling Past 50: A Closer Look into the World of Older Cyclists, Year 5 Survey" (2026), https://doi.org/10.31979/mti.2026.2443 Kachadoorian, Carol "Cycling Past 50: A Closer Look into the World of Older Cyclists, Year 5 Survey" , 2026, https://doi.org/10.31979/mti.2026.2443 Export RIS Citation Information. TY - Tech Report AU - Kachadoorian, Carol A2 - San Jose State University. College of Business. Mineta Transportation Institute A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - This document reports on approximately 2,800 responses to a North American survey of older adults who cycle. The survey, open from March 2024 through February 2025, included questions that captured a person’s cycling over their life course, as well as their current cycling styles, habits, and preferences. Responses reflect the impact of various factors on an older adult’s cycling habits with respect to their ability and agility and their expectation to continue cycling. The survey asked about falls and near misses in the past year, coding fall descriptions into six categories and sorting them by the respondent’s gender and age. The survey’s Visual Preference questions offered photos of cycling contexts and asked respondents to select four to six options for traveling within each context, then scored its safety and comfort level between 1 and 5. Key takeaways include: many older adults can continue to cycle as they age by using a different bicycle, establishing a different expectation with regard to cycling, finding others to cycle with, and using safe and comfortable cycling facilities. Survey questions about e-bikes, adult trikes, and tandems show the variety of bicycle types available, but point to the need for higher-capacity bikeways and education about sharing bikeways safely. The report ends with several issues for further consideration, including ways that caregiving can enhance or reduce cycling benefits, and how injury recovery can affect a return to cycling, or not. The population of older adults is growing, and examining the needs of this group ensures a community’s ability to create environments conducive to equitable mobility for all. AN - dot:89765 DO - https://doi.org/10.31979/mti.2026.2443 ET - Final Report KW - Aged KW - Bicycling KW - Mobility KW - Biological aging KW - Infrastructure KW - Bicycle crashes KW - Built environment KW - COVID-19 KW - Cyclists KW - Demographics KW - Falls KW - Surveys KW - Transportation equity KW - Gender LA - English PB - San Jose State University. College of Business. Mineta Transportation Institute PY - 2026-03-01 SN - 26-02 TI - Cycling Past 50: A Closer Look into the World of Older Cyclists, Year 5 Survey M3 - Tech Report N1 - United States N1 - CA-MTI-2443 UR - https://rosap.ntl.bts.gov/view/dot/89765 ER -
Empowering Tribal Communities: Success Stories in Workforce Development

United States. Department of Transportation. Federal Highway Administration

2024-07-16 | PDF

The U.S. Department of Transportation Federal Highway Administration’s (FHWA's) Strategic Workforce Development (SWD) Program plays a pivotal role in addressing the growing demand for a highway construction workforce while breaking down barriers for individuals seeking career opportunities and community improvement.

03/30/2026

Title : Empowering Tribal Communities: Success Stories in Workforce Development Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2024-07-16 URL : https://rosap.ntl.bts.gov/view/dot/89764 United States. Department of Transportation. Federal Highway Administration (2024). Empowering Tribal Communities: Success Stories in Workforce Development. United States. Department of Transportation. Federal Highway Administration "Empowering Tribal Communities: Success Stories in Workforce Development" (2024) United States. Department of Transportation. Federal Highway Administration "Empowering Tribal Communities: Success Stories in Workforce Development" , 2024 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration AB - The U.S. Department of Transportation Federal Highway Administration’s (FHWA's) Strategic Workforce Development (SWD) Program plays a pivotal role in addressing the growing demand for a highway construction workforce while breaking down barriers for individuals seeking career opportunities and community improvement. AN - dot:89764 KW - Education and training KW - Training KW - Road construction KW - Road construction industry KW - Transportation careers KW - Tribal government LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2024-07-16 TI - Empowering Tribal Communities: Success Stories in Workforce Development M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89764 ER -
Project 043 Noise–Power–Distance Reevaluation

Mavris, Dimitri N.

;

Kirby, Michelle

2020-03-28 | PDF

The standard technique for evaluating fleet noise is to estimate the flight procedure source noise by using noise–power–distance (NPD) curves. Noise calculations within the Aviation Environmental Design Tool (AEDT) rely on NPD curves provided by aircraft manufacturers. This dataset reflects representative aircraft categories at set power levels and ...

03/30/2026

Title : Project 043 Noise–Power–Distance Reevaluation Creator(s) : Mavris, Dimitri N.;Kirby, Michelle;Rajaram, Dushhyanth;Behere, Ameya; Corporate Creator(s) : Georgia Tech Research Corporation Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy; Published Date : 2020-03-28 URL : https://rosap.ntl.bts.gov/view/dot/89763 Mavris, Dimitri N. et al. (2020). Project 043 Noise–Power–Distance Reevaluation. Mavris, Dimitri N. et al. "Project 043 Noise–Power–Distance Reevaluation" (2020) Mavris, Dimitri N. et al. "Project 043 Noise–Power–Distance Reevaluation" , 2020 Export RIS Citation Information. TY - Tech Report AU - Mavris, Dimitri N. AU - Kirby, Michelle AU - Rajaram, Dushhyanth AU - Behere, Ameya A2 - Georgia Tech Research Corporation A3 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - The standard technique for evaluating fleet noise is to estimate the flight procedure source noise by using noise–power–distance (NPD) curves. Noise calculations within the Aviation Environmental Design Tool (AEDT) rely on NPD curves provided by aircraft manufacturers. This dataset reflects representative aircraft categories at set power levels and aircraft configurations. Noise levels are obtained as a function of slant distance via spherical spreading through a standard atmosphere, and other correction factors are applied to obtain the desired sound field metrics at the location of the receiver. The current NPD model does not consider the aircraft configuration (e.g., flap settings) or alternative flight procedures being implemented. These factors are important, because the noise characteristics of an aircraft depend on the thrust, aircraft speed, and airframe configuration, among other contributing factors such as ambient conditions. The outcome of this research is an approach based on the suggested NPD+C format, which will enable more accurate noise predictions because of its inclusion of aircraft configuration and speed changes. AN - dot:89763 KW - Aircraft noise KW - Evaluation and assessment KW - Noise KW - Noise sources KW - Civil aircraft KW - Quantitative metrics KW - ASCENT LA - English PB - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment PY - 2020-03-28 TI - Project 043 Noise–Power–Distance Reevaluation M3 - Tech Report N1 - United States N1 - 13-C-AJFE-GIT-021 UR - https://rosap.ntl.bts.gov/view/dot/89763 ER -
Use of Vegetation Enhanced by Green Soil Stabilization To Protect Kansas Roadsides From Erosion [Technical Summary]

Perić, Dunja ;

Olia, Arash Saeidi Rashk

2026-03-01 | PDF

The primary objective of this study was to investigate the feasibility of using lignin, an environmentally friendly biopolymer, for sustainable protection of Kansas roadsides against wind and rainfall erosion during the critical stage of construction that occurs prior to the emergence of a vegetative cover. Results from laboratory-scale experiments ...

03/30/2026

Title : Use of Vegetation Enhanced by Green Soil Stabilization To Protect Kansas Roadsides From Erosion [Technical Summary] Creator(s) : Perić, Dunja;Olia, Arash Saeidi Rashk;Fry, Jack; Corporate Creator(s) : Kansas State University Transportation Center Corporate Contributor(s) : Kansas. Dept. of Transportation. Bureau of Research Published Date : 2026-03-01 Report Number : KSU-20-2 URL : https://rosap.ntl.bts.gov/view/dot/89762 Perić, Dunja et al. (2026). Use of Vegetation Enhanced by Green Soil Stabilization To Protect Kansas Roadsides From Erosion [Technical Summary]. Perić, Dunja and Olia, Arash Saeidi Rashk and Fry, Jack "Use of Vegetation Enhanced by Green Soil Stabilization To Protect Kansas Roadsides From Erosion [Technical Summary]" (2026) Perić, Dunja et al. "Use of Vegetation Enhanced by Green Soil Stabilization To Protect Kansas Roadsides From Erosion [Technical Summary]" , 2026 Export RIS Citation Information. TY - Brief AU - Perić, Dunja AU - Olia, Arash Saeidi Rashk AU - Fry, Jack A2 - Kansas State University Transportation Center A3 - Kansas. Dept. of Transportation. Bureau of Research AB - The primary objective of this study was to investigate the feasibility of using lignin, an environmentally friendly biopolymer, for sustainable protection of Kansas roadsides against wind and rainfall erosion during the critical stage of construction that occurs prior to the emergence of a vegetative cover. Results from laboratory-scale experiments showed that spraying lignin over the surface of dry, silty soil provided very good to excellent protection against erosion. A crust formed on the surface of the soil upon spraying, thus inducing increased bonding among the particles and increased compressive strength, resulting in a decreased amount of wind erosion with increased spraying rate. Although the lignin used in this study is water-soluble, its presence in the soil increased viscosity of the pore fluid, thus decreasing hydraulic conductivity and decreasing the amount of rain erosion. Lignin concentration of 1% at 0.0325 gal/f2t was sufficient to suppress wind erosion, while 15% at 0.123 gal/ft2 was required to decrease the amount of rainfall erosion tenfold and sixfold for sloped and horizontal soil configurations, respectively. Additionally, lignin concentrations up to 4% and spraying rate of 0.0866 gal/ft2 did not affect monocot and dicot counts or vegetative cover size in field trials. Lower zinc and iron levels were found in soil treated with 1% and 2% lignin, but no difference was observed at 4% lignin compared to the untreated soil. AN - dot:89762 ET - Technical Summary KW - Erosion control KW - Soil stabilization KW - Wind erosion KW - Vegetation KW - Lignin KW - Roadside KW - Laboratory tests KW - Configuration management KW - Penetrometers LA - English PB - Kansas. Department of Transportation. Bureau of Materials and Research PY - 2026-03-01 SN - KSU-20-2 TI - Use of Vegetation Enhanced by Green Soil Stabilization To Protect Kansas Roadsides From Erosion [Technical Summary] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89762 ER -
Use of Vegetation Enhanced by Green Soil Stabilization To Protect Kansas Roadsides From Erosion

Perić, Dunja ;

Olia, Arash Saeidi Rashk

2026-03-01 | PDF

The primary objective of this study was to investigate the feasibility of using lignin, an environmentally friendly biopolymer, for sustainable protection of Kansas roadsides against wind and rainfall erosion during the critical stage of construction that occurs prior to the emergence of a vegetative cover. Results from laboratory-scale experiments ...

03/30/2026

Title : Use of Vegetation Enhanced by Green Soil Stabilization To Protect Kansas Roadsides From Erosion Creator(s) : Perić, Dunja;Olia, Arash Saeidi Rashk;Fry, Jack; Corporate Creator(s) : Kansas State University Transportation Center. Department of Civil Engineering Corporate Contributor(s) : Kansas. Dept. of Transportation. Bureau of Research Published Date : 2026-03-01 Report Number : K-TRAN: KSU-20-2 URL : https://rosap.ntl.bts.gov/view/dot/89761 Perić, Dunja et al. (2026). Use of Vegetation Enhanced by Green Soil Stabilization To Protect Kansas Roadsides From Erosion. Perić, Dunja and Olia, Arash Saeidi Rashk and Fry, Jack "Use of Vegetation Enhanced by Green Soil Stabilization To Protect Kansas Roadsides From Erosion" (2026) Perić, Dunja et al. "Use of Vegetation Enhanced by Green Soil Stabilization To Protect Kansas Roadsides From Erosion" , 2026 Export RIS Citation Information. TY - Tech Report AU - Perić, Dunja AU - Olia, Arash Saeidi Rashk AU - Fry, Jack A2 - Kansas State University Transportation Center. Department of Civil Engineering A3 - Kansas. Dept. of Transportation. Bureau of Research AB - The primary objective of this study was to investigate the feasibility of using lignin, an environmentally friendly biopolymer, for sustainable protection of Kansas roadsides against wind and rainfall erosion during the critical stage of construction that occurs prior to the emergence of a vegetative cover. Results from laboratory-scale experiments showed that spraying lignin over the surface of dry silty soil provided very good to excellent protection against erosion. A crust formed on the surface of the soil upon spraying, thus inducing increased bonding among the particles and increased compressive strength, resulting in a decreased amount of wind erosion with increased spraying rate. Although the lignin used in this study is water-soluble, its presence in the soil increased viscosity of the pore fluid, thus decreasing hydraulic conductivity and decreasing the amount of rain erosion. Lignin concentration of 1% at 0.0325 gal/ft2 was sufficient to suppress wind erosion, while 15% at 0.123 gal/ft2 was required to decrease the amount of rainfall erosion tenfold and sixfold for sloped and horizontal soil configurations, respectively. Additionally, lignin concentrations up to 4% and spraying rate of 0.0866 gal/ft2 did not affect monocot and dicot counts or vegetative cover size in field trials. Lower zinc and iron levels were found in soil treated with 1% and 2% lignin, but no difference was observed at 4% lignin compared to the untreated soil. AN - dot:89761 ET - Final Report: July 2019 – August 2023 KW - Erosion control KW - Soil stabilization KW - Wind erosion KW - Vegetation KW - Lignin KW - Roadside KW - Laboratory tests KW - Configuration management LA - English PB - Kansas. Department of Transportation. Bureau of Materials and Research PY - 2026-03-01 SN - K-TRAN: KSU-20-2 TI - Use of Vegetation Enhanced by Green Soil Stabilization To Protect Kansas Roadsides From Erosion M3 - Tech Report N1 - United States N1 - C2143 UR - https://rosap.ntl.bts.gov/view/dot/89761 ER -
Project 029(A) National Jet Fuel Combustion Program – Area #5: Atomization Test and Models Final Report

Lucht, Robert P. ;

Gore, Jay P.

2020-12-01 | PDF

The objectives of this project, as stated in the Invitation for ASCENT COE Notice of Intent (COE-2014-29), are to “measure the spray characteristics of the nozzles used in the Referee Combustor used in Area 6 tests and to develop models for characterizing the atomization and vaporization of the reference fuels.” We conducted experiments within the ...

03/30/2026

Title : Project 029(A) National Jet Fuel Combustion Program – Area #5: Atomization Test and Models Final Report Creator(s) : Lucht, Robert P.;Gore, Jay P.;Sojka, Paul E.;Meyer, Scott E.;Naik, Sameer V.;Bokhart, Andrew;Shin, Daniel;Raju, Hasti Veeraraghava;Rodrigues, Neil; Corporate Creator(s) : Purdue University Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment Published Date : 2020-12-01 URL : https://rosap.ntl.bts.gov/view/dot/89760 Lucht, Robert P. et al. (2020). Project 029(A) National Jet Fuel Combustion Program – Area #5: Atomization Test and Models Final Report. Lucht, Robert P. et al. "Project 029(A) National Jet Fuel Combustion Program – Area #5: Atomization Test and Models Final Report" (2020) Lucht, Robert P. et al. "Project 029(A) National Jet Fuel Combustion Program – Area #5: Atomization Test and Models Final Report" , 2020 Export RIS Citation Information. TY - Tech Report AU - Lucht, Robert P. AU - Gore, Jay P. AU - Sojka, Paul E. AU - Meyer, Scott E. AU - Naik, Sameer V. AU - Bokhart, Andrew AU - Shin, Daniel AU - Raju, Hasti Veeraraghava AU - Rodrigues, Neil A2 - Purdue University A3 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment AB - The objectives of this project, as stated in the Invitation for ASCENT COE Notice of Intent (COE-2014-29), are to “measure the spray characteristics of the nozzles used in the Referee Combustor used in Area 6 tests and to develop models for characterizing the atomization and vaporization of the reference fuels.” We conducted experiments within the joint experimental and modeling effort. The experimental tasks were performed at Purdue University, and the modeling tasks were performed by Prof. Matthias Ihme’s group at Stanford University, Prof. Suresh Menon’s group at Georgia Tech, and Vaidya Sankaran’s group at United Technologies Research Center (UTRC). Nader Rizk developed spray correlations based on the measurements. AB - Purdue University has highly capable test facilities for measuring spray characteristics over wide ranges of pressure, air temperature, and fuel temperature. The experimental diagnostics applied in this project included PDA and high-frame-rate shadowgraphy. The atomization and spray dynamics for multiple reference and candidate alternative fuels were characterized for the referee rig nozzle operating under near-LBO conditions. The referee rig operation was modeled using novel large-eddy simulation techniques featuring adaptive mesh refinement. AN - dot:89760 KW - Fuels KW - Combustion KW - Jet engine fuels KW - Tests KW - ASCENT LA - English PB - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment PY - 2020-12-01 TI - Project 029(A) National Jet Fuel Combustion Program – Area #5: Atomization Test and Models Final Report M3 - Tech Report N1 - United States N1 - COE-2014-29A, 401321 UR - https://rosap.ntl.bts.gov/view/dot/89760 ER -
Project 24A: Emissions Data Analysis for CLEEN, ACCESS, and Other Recent Tests

Barrett, Steven R.H.

;

Speth, Raymond

2015-08-01 | PDF

The objective of this research is to gather and analyze aircraft engine non-volatile particulate matter (nvPM) emissions data collected from CLEEN, ACCESS and other recent emission measurement campaigns and to develop improved models for the relationship between fuel composition and nvPM emissions. Improvements to estimates of nvPM emissions from a ...

03/30/2026

Title : Project 24A: Emissions Data Analysis for CLEEN, ACCESS, and Other Recent Tests Creator(s) : Barrett, Steven R.H.;Speth, Raymond;Malina, Robert;Alvarez, Luis; Corporate Creator(s) : Massachusetts Institute of Technology Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy; Published Date : 2015-08-01 URL : https://rosap.ntl.bts.gov/view/dot/89759 Barrett, Steven R.H. et al. (2015). Project 24A: Emissions Data Analysis for CLEEN, ACCESS, and Other Recent Tests. Barrett, Steven R.H. et al. "Project 24A: Emissions Data Analysis for CLEEN, ACCESS, and Other Recent Tests" (2015) Barrett, Steven R.H. et al. "Project 24A: Emissions Data Analysis for CLEEN, ACCESS, and Other Recent Tests" , 2015 Export RIS Citation Information. TY - Tech Report AU - Barrett, Steven R.H. AU - Speth, Raymond AU - Malina, Robert AU - Alvarez, Luis A2 - Massachusetts Institute of Technology A3 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - The objective of this research is to gather and analyze aircraft engine non-volatile particulate matter (nvPM) emissions data collected from CLEEN, ACCESS and other recent emission measurement campaigns and to develop improved models for the relationship between fuel composition and nvPM emissions. Improvements to estimates of nvPM emissions from alternative fuels will be useful in understanding the air quality and climate impacts of alternative jet fuels. AN - dot:89759 KW - Aircraft exhaust gases KW - Alternate fuels KW - Data analysis KW - Fuel composition KW - Jet engine fuels KW - Particulates KW - Pollutants KW - ASCENT LA - English PB - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment PY - 2015-08-01 TI - Project 24A: Emissions Data Analysis for CLEEN, ACCESS, and Other Recent Tests M3 - Tech Report N1 - United States N1 - 13-C-AJFE-MIT, Amendment No. 005 UR - https://rosap.ntl.bts.gov/view/dot/89759 ER -
Project 7 Civil, Supersonic Over-Flight, Sonic Boom (Noise) Standards Development, Study of Variability Effects (Task #1)

Sparrow, Victor W. ;

Hodgdon, Kathleen K.

2016-07-01 | PDF

The objective of this project was to continue research at The Pennsylvania State University in the ASCENT Center of Excellence to complement the sonic boom standards development ongoing within the Committee for Aviation Environmental Protection's (CAEP) Working Group 1 (Noise Technical), Supersonics Standards Task Group (SSTG). This research aimed ...

03/30/2026

Title : Project 7 Civil, Supersonic Over-Flight, Sonic Boom (Noise) Standards Development, Study of Variability Effects (Task #1) Creator(s) : Sparrow, Victor W.;Hodgdon, Kathleen K.;Doebler, Will; Corporate Creator(s) : Pennsylvania State University Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment Published Date : 2016-07-01 URL : https://rosap.ntl.bts.gov/view/dot/89758 Sparrow, Victor W. et al. (2016). Project 7 Civil, Supersonic Over-Flight, Sonic Boom (Noise) Standards Development, Study of Variability Effects (Task #1). Sparrow, Victor W. and Hodgdon, Kathleen K. and Doebler, Will "Project 7 Civil, Supersonic Over-Flight, Sonic Boom (Noise) Standards Development, Study of Variability Effects (Task #1)" (2016) Sparrow, Victor W. et al. "Project 7 Civil, Supersonic Over-Flight, Sonic Boom (Noise) Standards Development, Study of Variability Effects (Task #1)" , 2016 Export RIS Citation Information. TY - Tech Report AU - Sparrow, Victor W. AU - Hodgdon, Kathleen K. AU - Doebler, Will A2 - Pennsylvania State University A3 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment AB - The objective of this project was to continue research at The Pennsylvania State University in the ASCENT Center of Excellence to complement the sonic boom standards development ongoing within the Committee for Aviation Environmental Protection's (CAEP) Working Group 1 (Noise Technical), Supersonics Standards Task Group (SSTG). This research aimed to ensure that the behavior of the sonic boom metrics considered in the SSTG discussions were well-understood, as such metrics may be utilized in future sonic boom certification and/or rulemaking. The research focused on investigating the stability of the metrics in the presence of atmospheric turbulence effects and also on an initial investigation to remove turbulence effects (de-turbing) from measured sonic boom signatures. This project showed that some sonic boom metrics are less sensitive to atmospheric turbulence effects than others. AN - dot:89758 ET - Final Report KW - Sonic boom KW - Aerodynamic noise KW - Aircraft noise KW - Civil aviation KW - Environmental impacts KW - Standards KW - Supersonic aircraft KW - ASCENT LA - English PB - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment PY - 2016-07-01 TI - Project 7 Civil, Supersonic Over-Flight, Sonic Boom (Noise) Standards Development, Study of Variability Effects (Task #1) M3 - Tech Report N1 - United States N1 - 13-C-AJFE-PSU Amendment 003, 013 UR - https://rosap.ntl.bts.gov/view/dot/89758 ER -
Project 021 Improving Climate Policy Analysis Tools

Barrett, Steven R.H.

;

Allroggen, Florian

2020-01-01 | PDF

The objective of ASCENT Project 21 is to facilitate continued development of climate policy analysis tools that will enable impact assessments for different policy scenarios at the global, zonal, and regional scales and will enable FAA to address its strategic vision on sustainable aviation growth. Following this overall objective, the particular o ...

03/30/2026

Title : Project 021 Improving Climate Policy Analysis Tools Creator(s) : Barrett, Steven R.H.;Allroggen, Florian;Speth, Raymond L.;Prinn, Ronald;Malina, Robert;Staples, Mark;Eastham, Sebastian;Wolfe, Philip;Wong, Lawrence;Grobler, Carla; Corporate Creator(s) : Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment Published Date : 2020-01-01 URL : https://rosap.ntl.bts.gov/view/dot/89757 Barrett, Steven R.H. et al. (2020). Project 021 Improving Climate Policy Analysis Tools. Barrett, Steven R.H. et al. "Project 021 Improving Climate Policy Analysis Tools" (2020) Barrett, Steven R.H. et al. "Project 021 Improving Climate Policy Analysis Tools" , 2020 Export RIS Citation Information. TY - Tech Report AU - Barrett, Steven R.H. AU - Allroggen, Florian AU - Speth, Raymond L. AU - Prinn, Ronald AU - Malina, Robert AU - Staples, Mark AU - Eastham, Sebastian AU - Wolfe, Philip AU - Wong, Lawrence AU - Grobler, Carla A2 - Massachusetts Institute of Technology. Department of Aeronautics and Astronautics A3 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment AB - The objective of ASCENT Project 21 is to facilitate continued development of climate policy analysis tools that will enable impact assessments for different policy scenarios at the global, zonal, and regional scales and will enable FAA to address its strategic vision on sustainable aviation growth. Following this overall objective, the particular objectives of ASCENT 21 AB - are (1) to investigate climate response due to aviation emissions; (2) to continue the development of a reduced-order climate model for policy analysis consistent with the latest scientific understanding; and (3) to support FAA analyses of national and global policies as they relate to long-term atmospheric and environmental impacts. AN - dot:89757 ET - Final Report KW - Climate change mitigation KW - Environmental policy KW - Analysis KW - Aviation KW - Environmental impact analysis KW - Air quality management KW - Aircraft exhaust gases KW - ASCENT LA - English PB - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment PY - 2020-01-01 TI - Project 021 Improving Climate Policy Analysis Tools M3 - Tech Report N1 - United States N1 - 13-C-AJFE-MIT, 4, 17, 24, 37, and 42 UR - https://rosap.ntl.bts.gov/view/dot/89757 ER -
Connected Corridors

United States. Department of Transportation. Federal Highway Administration

2026-02-23 | PDF

The National Highway System supports our economy, safety, and daily travel. But delays that are caused by planned activities, like work zones and events, or unexpected problems, like crashes and bad weather, interrupt its function. Both transportation workers and travelers need accurate, up-to-date information, but this can be hard to get due to: I ...

03/30/2026

Title : Connected Corridors Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Federal Highway Administration. Center for Accelerating Innovation Contributor(s) : Peterson, Todd;Corbin, John;Johnson, David; Published Date : 2026-02-23 Report Number : FHWA-26-CAI-005 URL : https://rosap.ntl.bts.gov/view/dot/89756 United States. Department of Transportation. Federal Highway Administration (2026). Connected Corridors. United States. Department of Transportation. Federal Highway Administration "Connected Corridors" (2026) United States. Department of Transportation. Federal Highway Administration "Connected Corridors" , 2026 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Federal Highway Administration. Center for Accelerating Innovation A4 - Peterson, Todd A4 - Corbin, John A4 - Johnson, David AB - The National Highway System supports our economy, safety, and daily travel. But delays that are caused by planned activities, like work zones and events, or unexpected problems, like crashes and bad weather, interrupt its function. Both transportation workers and travelers need accurate, up-to-date information, but this can be hard to get due to: Information spread across too many separate data sources; No shared standards for data quality; Service providers must build special systems for each agency, which makes scaling them difficult; Agency rules can slow down the use of shared, subscription-based services; Many tools can’t connect or don’t work together; New solutions often stay local instead of spreading nationwide The Connected Corridors initiative tackles these challenges by encouraging states to work in a coordinated, shared approach, not by replacing or merging their systems. It promotes reliable data sharing, encourages common quality standards, and supports scalable services that can work well with other systems, while ensuring each agency retains control over its own data and platforms. AN - dot:89756 KW - Highway corridors KW - Data sharing KW - Traveler information and communication systems KW - Intelligent transportation systems LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2026-02-23 SN - FHWA-26-CAI-005 TI - Connected Corridors M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89756 ER -
Howling of a Model-Scale Nozzle Due to Shock-Induced Boundary-Layer Separation at Its Exit

Ramsey, David N.

;

Gavin, Joseph R.

2025-06-01 | PDF

The jet from a model-scale, internally mixed nozzle produced a loud howling when operated at jet Mach numbers between 0.80 and 1.00. Discrete tones dominated the noise radiated to the far field and powerful oscillations were present in the jet. To explain these observations, this paper leverages a blend of experimental acoustic and flow measurement ...

03/30/2026

Title : Howling of a Model-Scale Nozzle Due to Shock-Induced Boundary-Layer Separation at Its Exit Creator(s) : Ramsey, David N.;Gavin, Joseph R.;Ahuja, Krishan K.; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;Georgia Institute of Technology; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy Published Date : 2025-06-01 Report Number : jfm.2025.10170 DOI : https://doi.org/10.1017/jfm.2025.10170 Ramsey, David N. et al. (2025). Howling of a Model-Scale Nozzle Due to Shock-Induced Boundary-Layer Separation at Its Exit. https://doi.org/10.1017/jfm.2025.10170 Ramsey, David N. and Gavin, Joseph R. and Ahuja, Krishan K. "Howling of a Model-Scale Nozzle Due to Shock-Induced Boundary-Layer Separation at Its Exit" (2025), https://doi.org/10.1017/jfm.2025.10170 Ramsey, David N. et al. "Howling of a Model-Scale Nozzle Due to Shock-Induced Boundary-Layer Separation at Its Exit" , 2025, https://doi.org/10.1017/jfm.2025.10170 Export RIS Citation Information. TY - Journal Article AU - Ramsey, David N. AU - Gavin, Joseph R. AU - Ahuja, Krishan K. A2 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A2 - Georgia Institute of Technology A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - The jet from a model-scale, internally mixed nozzle produced a loud howling when operated at jet Mach numbers between 0.80 and 1.00. Discrete tones dominated the noise radiated to the far field and powerful oscillations were present in the jet. To explain these observations, this paper leverages a blend of experimental acoustic and flow measurements and modal analyses thereof via the spectral proper orthogonal decomposition, computational fluid dynamics simulations and local, linear stability analyses of vortex-sheet models for the flow inside the nozzle. This blend of experiments, computations and theory makes clear the cause of the howling, what sets its characteristic frequency and how it may be suppressed. The flow around a small-radius, convex bend just upstream of the final-nozzle exit led to a pocket of locally supersonic flow that was terminated by a shock. The shock was strong enough to separate the boundary layer, but neither the attached nor separated states were stable. A periodic, shock-induced separation of the boundary layer resulted, and this shock-wave/boundary-layer interaction coupled with a natural acoustic mode of the nozzle’s interior in a feedback phenomenon of sorts. Acoustic tones and large flow oscillations were produced at the associated natural frequency of the nozzle’s interior. AB - This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) license https://creativecommons.org/licenses/by/4.0/. Please cite this article as: Ramsey DN, Gavin JR, Ahuja KK. Howling of a model-scale nozzle due to shock-induced boundary-layer separation at its exit. Journal of Fluid Mechanics. 2025;1014:A8. https://doi.org/10.1017/jfm.2025.10170 AN - dot:89755 DO - https://doi.org/10.1017/jfm.2025.10170 KW - Acoustics KW - Sonics KW - Jet propelled aircraft KW - Aircraft noise KW - Boundary layer separation KW - ASCENT LA - English PB - Cambridge University Press. PY - 2025-06-01 SN - jfm.2025.10170 TI - Howling of a Model-Scale Nozzle Due to Shock-Induced Boundary-Layer Separation at Its Exit M3 - Journal Article N1 - United States N1 - 13-C-AJFE-GIT-060 N1 - Open Access; https://creativecommons.org/licenses/by/4.0/ UR - https://rosap.ntl.bts.gov/view/dot/89755 ER -
Roadside Right-of-Way Maintenance Strategies

Daniels, Cheryl ;

Burdell, Angela

2025-07-17 | PDF

The Indiana Department of Transportation’s (INDOT) roadside management program is tasked with multiple items across the state’s 39,000 lane miles. Roadside maintenance is an essential task that keeps INDOT’s rights-of-way (ROWs) safe and functional for drivers. Most roadside vegetation maintenance work for INDOT is outsourced, and INDOT’s in-house ...

03/30/2026

Title : Roadside Right-of-Way Maintenance Strategies Creator(s) : Daniels, Cheryl;Burdell, Angela;Ewbank, Patrick;Shane, Keith; Corporate Creator(s) : Purdue University. Joint Transportation Research Program Corporate Contributor(s) : Indiana Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-07-17 Report Number : FHWA/IN/JTRP-2025/20 DOI : https://doi.org/10.5703/1288284317900 Daniels, Cheryl et al. (2025). Roadside Right-of-Way Maintenance Strategies. https://doi.org/10.5703/1288284317900 Daniels, Cheryl et al. "Roadside Right-of-Way Maintenance Strategies" (2025), https://doi.org/10.5703/1288284317900 Daniels, Cheryl et al. "Roadside Right-of-Way Maintenance Strategies" , 2025, https://doi.org/10.5703/1288284317900 Export RIS Citation Information. TY - Tech Report AU - Daniels, Cheryl AU - Burdell, Angela AU - Ewbank, Patrick AU - Shane, Keith A2 - Purdue University. Joint Transportation Research Program A3 - Indiana Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Indiana Department of Transportation’s (INDOT) roadside management program is tasked with multiple items across the state’s 39,000 lane miles. Roadside maintenance is an essential task that keeps INDOT’s rights-of-way (ROWs) safe and functional for drivers. Most roadside vegetation maintenance work for INDOT is outsourced, and INDOT’s in-house staff perform any follow-up vegetation maintenance as needed. INDOT needs to focus on cost-efficient solutions due to budgetary constraints from increased labor, equipment, and contractor costs and no budgetary increases. INDOT contracted Davey Resource Group, Inc. (DRG) to provide recommendations for updates to INDOT’s roadside ROW vegetation maintenance strategies. DRG completed a literature review, interviewed regional DOTs, and performed an analysis of the identified gaps within INDOT’s vegetation maintenance program. DRG then provided implementation recommendations. The benefits and timeline of each of these implementation items were provided, including costs and return on investment (ROI) estimates when possible. Issues identified included a reactive vegetation management approach, staff who lack familiarity with INDOT’s vegetation maintenance operations standards, a lack of access to appropriate equipment/technology, a limited number of contractors bidding on vegetation work, and contractors taking on more work for which they have capacity. DRG recommends the development of specialized vegetation crews in each district. Purchase of specialized equipment and mapping technology is recommended for those crews, along with improvements to prequalification requirements, design standards, and engineering division communication to make vegetation maintenance easier and safer for maintenance staff. Alternative recommendations are provided where available. AN - dot:89754 DO - https://doi.org/10.5703/1288284317900 ET - Final Report KW - Roadside improvement KW - Maintenance KW - Vegetation control KW - Contracts KW - Asset management KW - Specifications KW - Literature reviews KW - Interviewing KW - Implementation KW - Budgeting KW - roadside maintenance KW - vegetation management KW - prequalification LA - English PB - Purdue University. Joint Transportation Research Program PY - 2025-07-17 SN - FHWA/IN/JTRP-2025/20 TI - Roadside Right-of-Way Maintenance Strategies M3 - Tech Report N1 - United States N1 - SPR-4804 UR - https://rosap.ntl.bts.gov/view/dot/89754 ER -
Evaluating the Impacts of I-24 Smart Corridor Strategies

Gu, Yangsong ;

Han, Lee D.

2025-10-01 | PDF

The I-24 Smart Corridor project, launched by TDOT since 2018, is a first-ever Smart Corridor study in Tennessee. This project integrates I-24 and SR-1, a parallel arterial roadway, with physical, technological, and operational enhancements to provide road users with accurate, real-time information and actively manage traffic. The I-24 project is co ...

03/30/2026

Title : Evaluating the Impacts of I-24 Smart Corridor Strategies Creator(s) : Gu, Yangsong;Han, Lee D.; Corporate Creator(s) : University of Tennessee, Knoxville. Center for Transportation Research Corporate Contributor(s) : Tennessee. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-10-01 Report Number : RES 2023-18 URL : https://rosap.ntl.bts.gov/view/dot/89753 Gu, Yangsong and Han, Lee D. (2025). Evaluating the Impacts of I-24 Smart Corridor Strategies. Gu, Yangsong and Han, Lee D. "Evaluating the Impacts of I-24 Smart Corridor Strategies" (2025) Gu, Yangsong and Han, Lee D. "Evaluating the Impacts of I-24 Smart Corridor Strategies" , 2025 Export RIS Citation Information. TY - Tech Report AU - Gu, Yangsong AU - Han, Lee D. A2 - University of Tennessee, Knoxville. Center for Transportation Research A3 - Tennessee. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The I-24 Smart Corridor project, launched by TDOT since 2018, is a first-ever Smart Corridor study in Tennessee. This project integrates I-24 and SR-1, a parallel arterial roadway, with physical, technological, and operational enhancements to provide road users with accurate, real-time information and actively manage traffic. The I-24 project is conducted via three phases. At the time of this report, Phases 1 and 2 are complete, while Phase 3, targeted at long-term development, is still under design and deployment. This research project aligns with the project’s overarching goals, to assess the impacts of multiple strategies implemented during Phases 1 and 2, with particular emphasis on travel time reliability, safety, and mobility. Through comprehensive before and after evaluations and benefit cost analyses, this effort also aims to provide a data-driven foundation for future investments in Smart Corridor initiatives across Tennessee. AN - dot:89753 KW - Corridors KW - Variable speed limits KW - Before and after studies KW - Evaluation KW - Safety KW - Mobility KW - Travel time reliability KW - Strategic planning KW - I-24 Smart Corridor LA - English PB - Tennessee. Department of Transportation PY - 2025-10-01 SN - RES 2023-18 TI - Evaluating the Impacts of I-24 Smart Corridor Strategies M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89753 ER -
Project 009 Geospatially Driven Noise-Estimation Module

Mavris, Dimitri N.

;

Pfaender, Holger

2023-09-01 | PDF

The goal of this project was to research potential open-source alternative geospatial frameworks for upgrading AEDT, and to test and experiment with different novel computational approached in order to drastically speed up the noise exposure calculations from potential large numbers of UAS being operated for package delivery or other potential UAS ...

03/30/2026

Title : Project 009 Geospatially Driven Noise-Estimation Module Creator(s) : Mavris, Dimitri N.;Pfaender, Holger;Gautier, Raphael;Kirby, Michelle;Markowitz, Anthony;Yumuk, Cem;Gharbi, Aroua;Delage, Martin;Matticoli, Joaquin;Singla, Deepika;Wang, Xi;Chardin, Hugue;Penfei, Jing; Corporate Creator(s) : Georgia Institute of Technology Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment Published Date : 2023-09-01 URL : https://rosap.ntl.bts.gov/view/dot/89752 Mavris, Dimitri N. et al. (2023). Project 009 Geospatially Driven Noise-Estimation Module. Mavris, Dimitri N. et al. "Project 009 Geospatially Driven Noise-Estimation Module" (2023) Mavris, Dimitri N. et al. "Project 009 Geospatially Driven Noise-Estimation Module" , 2023 Export RIS Citation Information. TY - Tech Report AU - Mavris, Dimitri N. AU - Pfaender, Holger AU - Gautier, Raphael AU - Kirby, Michelle AU - Markowitz, Anthony AU - Yumuk, Cem AU - Gharbi, Aroua AU - Delage, Martin AU - Matticoli, Joaquin AU - Singla, Deepika AU - Wang, Xi AU - Chardin, Hugue AU - Penfei, Jing A2 - Georgia Institute of Technology A3 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment AB - The goal of this project was to research potential open-source alternative geospatial frameworks for upgrading AEDT, and to test and experiment with different novel computational approached in order to drastically speed up the noise exposure calculations from potential large numbers of UAS being operated for package delivery or other potential UAS applications. AN - dot:89752 ET - Final Report KW - Geographic information systems KW - Aircraft noise KW - Unmanned aircraft systems KW - Calculation KW - Computer models LA - English PB - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment PY - 2023-09-01 TI - Project 009 Geospatially Driven Noise-Estimation Module M3 - Tech Report N1 - United States N1 - 13-C-AJFE-GIT-059 UR - https://rosap.ntl.bts.gov/view/dot/89752 ER -
Evaluation of a Prototype Advanced Taxiway Guidance System (ATGS)

Katz, Eric S.

2000-02-01 | PDF

The Federal Aviation Administration (FAA) Office of Aviation Research, Airport Technology Research and Development Branch, AAR-410 has designed, installed, and evaluated a prototype Advanced Taxiway Guidance System (ATGS) at the Atlantic City International Airport (ACY). The principal feature of this prototype is automatically controllable taxiway ...

03/30/2026

Title : Evaluation of a Prototype Advanced Taxiway Guidance System (ATGS) Creator(s) : Katz, Eric S. Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 2000-02-01 Report Number : DOT/FAA/AR-TN00/9 URL : https://rosap.ntl.bts.gov/view/dot/89751 Katz, Eric S. (2000). Evaluation of a Prototype Advanced Taxiway Guidance System (ATGS). Katz, Eric S. "Evaluation of a Prototype Advanced Taxiway Guidance System (ATGS)" (2000) Katz, Eric S. "Evaluation of a Prototype Advanced Taxiway Guidance System (ATGS)" , 2000 Export RIS Citation Information. TY - Tech Report AU - Katz, Eric S. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - The Federal Aviation Administration (FAA) Office of Aviation Research, Airport Technology Research and Development Branch, AAR-410 has designed, installed, and evaluated a prototype Advanced Taxiway Guidance System (ATGS) at the Atlantic City International Airport (ACY). The principal feature of this prototype is automatically controllable taxiway lighting, which is used to provide improved surface route guidance to taxiing aircraft. The system automatically illuminates a specific taxiway route for each arrival and departure thus reducing the chances of an aircraft making a wrong turn. The system is also designed to detect and provide Air Traffic Control (ATC) alarms for potential runway incursions, pilot route deviations, and route conflicts between aircraft. AB - The prototype ATGS incorporates subsystems that are used to locate/identify aircraft and to automatically control and monitor all of the taxiway lighting located within the test bed. A key objective in the evaluation of the ATGS was to determine whether these subsystems could be successfully integrated. Another objective was to determine the effectiveness of the system in improving safety in terms of reducing incorrect taxiing turns and runway incursions. AB - After evaluating the prototype ATGS during numerous test sessions, it was determined that these various subsystems could be integrated into a single automated visual guidance system. Data collected from the evaluation indicate that implementation of an ATGS would help improve airport safety by reducing incorrect taxiing turns and runway incursions, particularly in night and/or low-visibility operations. AN - dot:89751 ET - Technical Note KW - Air traffic control KW - Air traffic control facilities KW - Aircraft guidance systems KW - Automatic control KW - Detection and identification systems KW - Lighting systems KW - Taxiways LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2000-02-01 SN - DOT/FAA/AR-TN00/9 TI - Evaluation of a Prototype Advanced Taxiway Guidance System (ATGS) M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89751 ER -
Identification of Stochastic Manufacturing Defects Within Additively Manufactured Acoustic Liners

Windows, Joseph ;

Packer, Alden

2025-08-01 | PDF

The exploration of novel acoustic liner designs using 3D internal lattices has become a growing topic of interest within the field of additive manufacturing (AM). However, the comparison between the acoustic liner response of computational simulation and experimental testing tends to show significant deviation. A potential cause of this deviation i ...

03/30/2026

Title : Identification of Stochastic Manufacturing Defects Within Additively Manufactured Acoustic Liners Creator(s) : Windows, Joseph;Packer, Alden;Nelson, Eric;Chowaniec, Jeffrey Jr;Mendoza, Jeffrey;Reimann, Craig;Winkler, Julian;Homma, Kenji;Meisel, Nicholas; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;Pennsylvania State University; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy Published Date : 2025-08-01 URL : https://rosap.ntl.bts.gov/view/dot/89750 Windows, Joseph et al. (2025). Identification of Stochastic Manufacturing Defects Within Additively Manufactured Acoustic Liners. Windows, Joseph et al. "Identification of Stochastic Manufacturing Defects Within Additively Manufactured Acoustic Liners" (2025) Windows, Joseph et al. "Identification of Stochastic Manufacturing Defects Within Additively Manufactured Acoustic Liners" , 2025 Export RIS Citation Information. TY - Proceedings AU - Windows, Joseph AU - Packer, Alden AU - Nelson, Eric AU - Chowaniec, Jeffrey Jr AU - Mendoza, Jeffrey AU - Reimann, Craig AU - Winkler, Julian AU - Homma, Kenji AU - Meisel, Nicholas A2 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A2 - Pennsylvania State University A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - The exploration of novel acoustic liner designs using 3D internal lattices has become a growing topic of interest within the field of additive manufacturing (AM). However, the comparison between the acoustic liner response of computational simulation and experimental testing tends to show significant deviation. A potential cause of this deviation is the inclusion of stochastic manufacturing defects within the part. This paper establishes a pipeline for systematically identifying and quantifying manufacturing defects in the printing of acoustic liners. This approach intends to offer up significant insight into the build quality of the printed lattice structures without the cost and time investment typically required of computed tomography (CT) scanning. The core of the liner design analyzed in this paper is made up of a Schwarz P lattice. Error distributions of several design variables are found by taking manual measurements of printed liners. Additionally, liners are scored using an automated screening method to detect significantly flawed prints. The potential for error distributions to be used in stochastic simulation studies could help predict what effect manufacturing defects have on the behavior of acoustic liners. AN - dot:89750 KW - Acoustics KW - Three dimensional printing KW - Noise control KW - Aviation KW - Manufacturing KW - ASCENT KW - Additive manufacturing LA - English PB - The Minerals, Metals & Materials Society (TMS) PY - 2025-08-01 TI - Identification of Stochastic Manufacturing Defects Within Additively Manufactured Acoustic Liners M3 - Proceedings N1 - United States N1 - 13-C-AJFE-PSU-113 N1 - Open Access; https://creativecommons.org/licenses/by/4.0/ UR - https://rosap.ntl.bts.gov/view/dot/89750 ER -
Mechanisms Driving Altitude- and Latitude dependent Air Quality Variations From High-Altitude NOx Emissions

Oh, Lucas J. ;

Eastham, Sebastian D.

2026-01-01 | PDF

The environmental impact of nitrogen oxide (NOx) emissions varies with emission altitude and latitude. NOx emissions from subsonic aviation (9-12 km) contribute to net global ozone formation, whereas those from supersonic aircraft (above 14 km) lead to net global ozone depletion. However, the effects of NOx emission altitude on surface air quality ...

03/30/2026

Title : Mechanisms Driving Altitude- and Latitude dependent Air Quality Variations From High-Altitude NOx Emissions Creator(s) : Oh, Lucas J.;Eastham, Sebastian D.;Barrett, Steven R.H.; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;Massachusetts Institute of Technology; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy Published Date : 2026-01-01 Report Number : s41612-026-01324-9 DOI : https://doi.org/10.1038/s41612-026-01324-9 Oh, Lucas J. et al. (2026). Mechanisms Driving Altitude- and Latitude dependent Air Quality Variations From High-Altitude NOx Emissions. https://doi.org/10.1038/s41612-026-01324-9 Oh, Lucas J. and Eastham, Sebastian D. and Barrett, Steven R.H. "Mechanisms Driving Altitude- and Latitude dependent Air Quality Variations From High-Altitude NOx Emissions" (2026), https://doi.org/10.1038/s41612-026-01324-9 Oh, Lucas J. et al. "Mechanisms Driving Altitude- and Latitude dependent Air Quality Variations From High-Altitude NOx Emissions" , 2026, https://doi.org/10.1038/s41612-026-01324-9 Export RIS Citation Information. TY - Journal Article AU - Oh, Lucas J. AU - Eastham, Sebastian D. AU - Barrett, Steven R.H. A2 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A2 - Massachusetts Institute of Technology A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - The environmental impact of nitrogen oxide (NOx) emissions varies with emission altitude and latitude. NOx emissions from subsonic aviation (9-12 km) contribute to net global ozone formation, whereas those from supersonic aircraft (above 14 km) lead to net global ozone depletion. However, the effects of NOx emission altitude on surface air quality remain understudied. We evaluate how NOx emissions at different altitudes (8–22 km) and latitudes influence near-surface concentrations of two known air pollutants: ozone and fine particulate matter (PM2.5). Using the global chemical transport model GEOS-Chem, we find that NOx emissions of 1 Tg N yr−1 at 8–10 km (30–60°N) increase surface ozone (population-weighted) by 0.52 ppb and surface PM2.5 by 35 ngm−3, whereas emissions at 20–22 km reduce surface ozone by 1.73 ppb and increase surface PM2.5 by 310 ngm−3; this is nine times the PM2.5 increase per unit NOx from lower-altitude emissions. These effects stem from altitude-dependent mechanisms: at lower altitudes typical of subsonic aviation, NOx emissions increase upper tropospheric ozone which leads to enhanced surface ozone and nitrate aerosol. However, when emitted at higher altitudes NOx instead depletes ozone, permitting more ultraviolet light to reach the troposphere which boosts OH production and accelerates production of sulfate aerosol while destroying near-surface ozone. Our findings suggest that NOx emissions from high-altitude sources, including supersonic aircraft may not only contribute to stratospheric ozone depletion but also cause larger changes (albeit of mixed sign) in surface air quality than subsonic aviation per unit of NOx emitted. AB - This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) license https://creativecommons.org/licenses/by/4.0/. Please cite this article as: Oh, L.J., Eastham, S.D. & Barrett, S.R.H. Mechanisms driving altitude- and latitude-dependent air quality variations from high-altitude NOx emissions. npj Clim Atmos Sci 9, 54 (2026). https://doi.org/10.1038/s41612-026-01324-9 AN - dot:89749 DO - https://doi.org/10.1038/s41612-026-01324-9 KW - Air quality KW - Measurement KW - Pollutants KW - Altitude KW - Aviation KW - ASCENT LA - English PB - Springer Nature PY - 2026-01-01 SN - s41612-026-01324-9 TI - Mechanisms Driving Altitude- and Latitude dependent Air Quality Variations From High-Altitude NOx Emissions M3 - Journal Article N1 - United States N1 - 13-C-AJFE-MIT-120 N1 - Open Access; https://creativecommons.org/licenses/by/4.0/ UR - https://rosap.ntl.bts.gov/view/dot/89749 ER -
High‐Speed Rail Feasibility Study Business Plan - Appendices

Transportation Economics & Management Systems, Inc (TEMS) ...

2010-03-01 | PDF

The appendices to the High-Speed Rail Feasibility Study provide the technical, institutional, and public-involvement documentation supporting the Rocky Mountain Rail Authority’s 2010 business plan. Organized in thirteen sections, they include RMRA membership by jurisdiction; the COMPASS™ travel-demand model; zone and socioeconomic data; stated-pref ...

03/30/2026

Title : High‐Speed Rail Feasibility Study Business Plan - Appendices Corporate Creator(s) : Transportation Economics & Management Systems, Inc (TEMS);Quandel Consultants, LLC;GBSM, Inc; Corporate Contributor(s) : Rocky Mountain Rail Authority Published Date : 2010-03-01 URL : https://rosap.ntl.bts.gov/view/dot/89748 Transportation Economics & Management Systems, Inc (TEMS) (2010). High‐Speed Rail Feasibility Study Business Plan - Appendices. Transportation Economics & Management Systems, Inc (TEMS) "High‐Speed Rail Feasibility Study Business Plan - Appendices" (2010) Transportation Economics & Management Systems, Inc (TEMS) "High‐Speed Rail Feasibility Study Business Plan - Appendices" , 2010 Export RIS Citation Information. TY - Tech Report A2 - Transportation Economics & Management Systems, Inc (TEMS) A2 - Quandel Consultants, LLC A2 - GBSM, Inc A3 - Rocky Mountain Rail Authority AB - The appendices to the High-Speed Rail Feasibility Study provide the technical, institutional, and public-involvement documentation supporting the Rocky Mountain Rail Authority’s 2010 business plan. Organized in thirteen sections, they include RMRA membership by jurisdiction; the COMPASS™ travel-demand model; zone and socioeconomic data; stated-preference survey instruments; detailed capital-cost schematics; regional unit-price and escalation analysis; rail tunnel evaluation; I-70 grade comparisons; a Colorado Springs alignment option; AGS technology performance criteria; an assessment of novel technologies; train schedules for the FRA Developed Option; and documentation of the public involvement process. AB - A substantial portion of the appendix volume documents the study’s analytical framework. The COMPASS™ model is presented as a multimodal forecasting system calibrated for business, commuter, tourist, and social trips, with separate treatment of long- and short-distance travel and incremental “pivot point” forecasting used to preserve observed travel patterns. The appendices also supply the underlying zone system, socioeconomic inputs, and survey forms used to estimate values of time, frequency, reliability, and modal choice behavior. The engineering and alternatives appendices expand the study’s treatment of infrastructure cost and route performance. They include detailed segment-level capital-cost schematics, unit-price assumptions, tunnel evaluation, I-70 4 percent versus 7 percent grade comparisons, and a possible Colorado Springs alignment variation. In the I-70 analysis, the appendices emphasize that the purpose of the study was to identify feasible alternatives for future NEPA review rather than to select a final optimal route or technology, and they conclude that either the Pando or Vail Pass alternatives could remain under consideration. AB - The appendices also address technology screening and implementation support. They include I-70 Coalition performance criteria for AGS concepts, a critique of “novel” or low-cost-guideway technologies, schedules for the FRA Developed Option, and documentation of corridor workshops and stakeholder consultation. In its discussion of novel technologies, the appendix states that both the I-70 PEIS and the RMRA business plan found rail less expensive than maglev while offering similar performance, reinforcing the report’s emphasis on feasible rather than speculative solutions. AB - Cite as: Transportation Economics & Management Systems, Inc., Quandel Consultants, LLC, & GBSM, Inc. (2010, March). High-speed rail feasibility study: Business plan—Appendices. Rocky Mountain Rail Authority. AN - dot:89748 KW - High speed rail KW - Feasibility analysis KW - Business models KW - Rail transit LA - English PB - Rocky Mountain Rail Authority PY - 2010-03-01 TI - High‐Speed Rail Feasibility Study Business Plan - Appendices M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89748 ER -
Creating Effective Graphic Changeable Dynamic Message Sign (DMS) Messaging

Kondyli, Alexandra

;

Schrock, Steven D.

2026-03-01 | PDF

Successful transportation safety messages are only effective if travelers can comprehend the notices. However, one method of safety messaging, text-only messages, can be challenging for non-native English speakers and slow-reading populations, such as older adults. The addition of graphics can potentially improve message comprehension, but their ef ...

03/30/2026

Title : Creating Effective Graphic Changeable Dynamic Message Sign (DMS) Messaging Creator(s) : Kondyli, Alexandra;Schrock, Steven D.;Mahajan, Kirti;Masud, Saumik Sakib Bin;Karki, Aayush Maan;Shrestha, Saurav;Tabatabaei, Mahgam; Corporate Creator(s) : University of Kansas. Transportation Center;K-TRAN (Research program); Corporate Contributor(s) : Kansas. Dept. of Transportation. Bureau of Research Published Date : 2026-03-01 Report Number : K-TRAN: KU-24-3 URL : https://rosap.ntl.bts.gov/view/dot/89747 Kondyli, Alexandra et al. (2026). Creating Effective Graphic Changeable Dynamic Message Sign (DMS) Messaging. Kondyli, Alexandra et al. "Creating Effective Graphic Changeable Dynamic Message Sign (DMS) Messaging" (2026) Kondyli, Alexandra et al. "Creating Effective Graphic Changeable Dynamic Message Sign (DMS) Messaging" , 2026 Export RIS Citation Information. TY - Tech Report AU - Kondyli, Alexandra AU - Schrock, Steven D. AU - Mahajan, Kirti AU - Masud, Saumik Sakib Bin AU - Karki, Aayush Maan AU - Shrestha, Saurav AU - Tabatabaei, Mahgam A2 - University of Kansas. Transportation Center A2 - K-TRAN (Research program) A3 - Kansas. Dept. of Transportation. Bureau of Research AB - Successful transportation safety messages are only effective if travelers can comprehend the notices. However, one method of safety messaging, text-only messages, can be challenging for non-native English speakers and slow-reading populations, such as older adults. The addition of graphics can potentially improve message comprehension, but their effectiveness compared to text-only messaging campaigns is uncertain. This study evaluated the role of graphics, both with and without text, in enhancing comprehension and the effectiveness of dynamic message signs (DMS), with attention to demographic factors. Results showed that signs with graphics and text consistently outperformed graphics-only signs across all measures, including conspicuity, comprehension, ease of use, intention to comply, and memorability. The lowest-scoring signs lacked text, leading to poor interpretation accuracy and compliance. Statistical analyses confirmed that text significantly improved message effectiveness by reducing comprehension gaps between native and non-native English speakers. Age also influenced performance, with drivers older than 41 years old demonstrating higher effectiveness scores, likely due to driving experience. Logistic regression showed that age, literacy rate, and text presence positively predicted accurate sign interpretation. The findings indicate that graphics alone are insufficient for effective DMS communication, although pairing graphics with text enhances comprehension and compliance for all populations, especially for non-native speakers and young drivers. Awareness initiatives are recommended to improve familiarity with graphic signs. AN - dot:89747 ET - Final Report: July 2023 – October 2025 KW - Variable message signs KW - Visibility KW - Comprehension KW - Logistic regression analysis KW - Graphics KW - Drivers KW - Statistical analysis KW - Evaluation KW - Travelers KW - Memorability LA - English PB - Kansas. Department of Transportation. Bureau of Materials and Research PY - 2026-03-01 SN - K-TRAN: KU-24-3 TI - Creating Effective Graphic Changeable Dynamic Message Sign (DMS) Messaging M3 - Tech Report N1 - United States N1 - C2230 UR - https://rosap.ntl.bts.gov/view/dot/89747 ER -
Creating Effective Graphic Changeable Dynamic Message Sign (DMS) Messaging [Technical Summary]

Kondyli, Alexandra

;

Schrock, Steven D.

2026-03-01 | PDF

Successful transportation messages are only effective if travelers can read and comprehend the message. However, text-based messages can be challenging for non-native English speakers or slow-reading populations, such as the elderly. The addition of graphics messages as a potential aid to improve message comprehension is uncertain, as is their effe ...

03/30/2026

Title : Creating Effective Graphic Changeable Dynamic Message Sign (DMS) Messaging [Technical Summary] Creator(s) : Kondyli, Alexandra;Schrock, Steven D.;Mahajan, Kirti;Masud, Saumik Sakib Bin;Karki, Aayush Maan;Shrestha, Saurav;Tabatabaei, Mahgam; Corporate Creator(s) : University of Kansas Corporate Contributor(s) : Kansas. Department of Transportation. Bureau of Materials and Research Published Date : 2026-03-01 Report Number : KU-24-3 URL : https://rosap.ntl.bts.gov/view/dot/89746 Kondyli, Alexandra et al. (2026). Creating Effective Graphic Changeable Dynamic Message Sign (DMS) Messaging [Technical Summary]. Kondyli, Alexandra et al. "Creating Effective Graphic Changeable Dynamic Message Sign (DMS) Messaging [Technical Summary]" (2026) Kondyli, Alexandra et al. "Creating Effective Graphic Changeable Dynamic Message Sign (DMS) Messaging [Technical Summary]" , 2026 Export RIS Citation Information. TY - Brief AU - Kondyli, Alexandra AU - Schrock, Steven D. AU - Mahajan, Kirti AU - Masud, Saumik Sakib Bin AU - Karki, Aayush Maan AU - Shrestha, Saurav AU - Tabatabaei, Mahgam A2 - University of Kansas A3 - Kansas. Department of Transportation. Bureau of Materials and Research AB - Successful transportation messages are only effective if travelers can read and comprehend the message. However, text-based messages can be challenging for non-native English speakers or slow-reading populations, such as the elderly. The addition of graphics messages as a potential aid to improve message comprehension is uncertain, as is their effectiveness compared to text-only messaging campaigns. Current literature reviews have focused on the use of graphical shields and highway signs for messaging, but research is needed to analyze the effectiveness of graphics for conveying safety messages without explanatory text and evaluate whether this approach could be beneficial for specific populations. The objectives of this project were to determine whether graphics can be used to enhance comprehension and effectiveness of messaging, and to help guide development of guidelines to determine when and how the graphics, either stand-alone or supplemental to text, can be used to enhance the comprehension and effectiveness of key safety messages. AN - dot:89746 ET - Technical Summary KW - Variable message signs KW - Visibility KW - Comprehension KW - Logistic regression analysis KW - Drivers KW - Statistical analysis KW - Evaluation KW - Travelers KW - Literature reviews KW - Memorability LA - English PB - Kansas. Department of Transportation. Bureau of Materials and Research PY - 2026-03-01 SN - KU-24-3 TI - Creating Effective Graphic Changeable Dynamic Message Sign (DMS) Messaging [Technical Summary] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89746 ER -
Implementing the Safe System Approach for Speed Management in Utah

Schultz, Grant G. ;

Tripp, Kezia I.

2026-02-01 | PDF

Speed management is central to reducing fatal and serious injury crashes. The Safe System Approach, an emerging roadway safety paradigm in the United States, recognizes human error and vulnerability and focuses on minimizing crash severity through coordinated policy, design, and operational strategies. This research examines how Safe System Approac ...

03/30/2026

Title : Implementing the Safe System Approach for Speed Management in Utah Creator(s) : Schultz, Grant G.;Tripp, Kezia I.;Goss, Abbie L.; Corporate Creator(s) : Brigham Young University. Department of Civil and Construction Engineering Corporate Contributor(s) : Utah. Department of Transportation. Research and Innovation Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-02-01 Report Number : UT-26.01 URL : https://rosap.ntl.bts.gov/view/dot/89745 Schultz, Grant G. et al. (2026). Implementing the Safe System Approach for Speed Management in Utah. Schultz, Grant G. and Tripp, Kezia I. and Goss, Abbie L. "Implementing the Safe System Approach for Speed Management in Utah" (2026) Schultz, Grant G. et al. "Implementing the Safe System Approach for Speed Management in Utah" , 2026 Export RIS Citation Information. TY - Tech Report AU - Schultz, Grant G. AU - Tripp, Kezia I. AU - Goss, Abbie L. A2 - Brigham Young University. Department of Civil and Construction Engineering A3 - Utah. Department of Transportation. Research and Innovation Division A3 - United States. Department of Transportation. Federal Highway Administration AB - Speed management is central to reducing fatal and serious injury crashes. The Safe System Approach, an emerging roadway safety paradigm in the United States, recognizes human error and vulnerability and focuses on minimizing crash severity through coordinated policy, design, and operational strategies. This research examines how Safe System Approach principles can be applied to speed management, with a focus on identifying practical countermeasures and implementation strategies relevant to the Utah Department of Transportation (UDOT). A compendium of practice was conducted to evaluate speed management countermeasures and document how cities and state Departments of Transportation are implementing Safe System Approach-based strategies. Thirty-two countermeasures were identified, including policy-based programs, automated enforcement, and roadway design treatments such as road diets, roundabouts, curb extensions, and gateway features. Findings show that implementing multiple, coordinated strategies is more effective than isolated interventions. The use of high-quality, context-sensitive speed and safety data supports proactive alignment of speed limits, roadway design, and safety goals. Establishing a clear Safe System Approach vision, supported by available federal and state tools, provides agencies with clear guidance for implementation. Based on the results of this research, several recommendations were provided for UDOT, including continuing to implement countermeasures for speed management in speed limit setting policies, evaluating current policies related to speed safety cameras in the state, incorporating Safe System Approach practices in the Strategic Highway Safety Plan, creating a speed management action plan, and placing a strong emphasis on community education tied to speed management. AN - dot:89745 ET - Final Report: Oct 2024 to Feb 2026 KW - Fail safe systems KW - Safety engineering KW - Speed control KW - Transportation safety KW - Implementation KW - Countermeasures KW - Data analysis KW - Crash injuries KW - Fatalities KW - Safe system approach KW - safe system for speed management KW - speed management LA - English PB - Utah Department of Transportation PY - 2026-02-01 SN - UT-26.01 TI - Implementing the Safe System Approach for Speed Management in Utah M3 - Tech Report N1 - United States N1 - 25-8516 UR - https://rosap.ntl.bts.gov/view/dot/89745 ER -
Quantifying Vessel Propeller Wash Impacts on Sedimentation in Shallow-Bay Ports and Waterways

Figulus, Jens

;

Lawrence, Aaron

2026-03-23 | PDF

Shallow-bay ports and waterways in bay systems along the Gulf Coast of America are critical transportation infrastructure and the Nation’s economic drivers. Vessel propeller wash is the water movement induced by the forces generated from propeller rotation as vessels transit shipping channels. It has the potential to suspend sediment that can then ...

03/30/2026

Title : Quantifying Vessel Propeller Wash Impacts on Sedimentation in Shallow-Bay Ports and Waterways Creator(s) : Figulus, Jens;Lawrence, Aaron;Gombac, Andrew;Kulesza, Stacey; Corporate Creator(s) : Texas A&M University;Texas State University--San Marcos;CREATE - Coastal REsearch And Transportation Education; Corporate Contributor(s) : United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2026-03-23 Report Number : 2301-8 URL : https://rosap.ntl.bts.gov/view/dot/89744 Figulus, Jens et al. (2026). Quantifying Vessel Propeller Wash Impacts on Sedimentation in Shallow-Bay Ports and Waterways. Figulus, Jens et al. "Quantifying Vessel Propeller Wash Impacts on Sedimentation in Shallow-Bay Ports and Waterways" (2026) Figulus, Jens et al. "Quantifying Vessel Propeller Wash Impacts on Sedimentation in Shallow-Bay Ports and Waterways" , 2026 Export RIS Citation Information. TY - Tech Report AU - Figulus, Jens AU - Lawrence, Aaron AU - Gombac, Andrew AU - Kulesza, Stacey A2 - Texas A&M University A2 - Texas State University--San Marcos A2 - CREATE - Coastal REsearch And Transportation Education A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - Shallow-bay ports and waterways in bay systems along the Gulf Coast of America are critical transportation infrastructure and the Nation’s economic drivers. Vessel propeller wash is the water movement induced by the forces generated from propeller rotation as vessels transit shipping channels. It has the potential to suspend sediment that can then be transported throughout the system, leading to potential sedimentation issues. In this study, field measurements using a vessel-mounted Acoustic Doppler Current Profiler (ADCP)and echo sounder system were conducted in the Houston Ship Channel (HSC) in Galveston Bay, Texas, by traversing the HSC back and forth with a survey vessel immediately after passage of a large ship. The obtained high-resolution 3D velocity and acoustic amplitude return values were processed to quantify suspended sediment concentration (SSC) and suspended sediment flux throughout the water column for around 80 different vessels transiting the HSC. Results indicate that vessel-induced SSC in the ship channel and along the slopes can reach values around 1 g/L, two orders of magnitude larger than back ground concentrations. Furthermore, suspended sediment fluxes close to 200 g/s perpendicular to the channel axis have been estimated from the field measurements. Simultaneous electrical resistivity measurements via an instrumented tow cable were used to test another measuring technique to assess suspended sediment concentration in the water column caused by large vessels. Although the signals were too small to image the SSC, the average electrical resistivity within the HSC was significantly different when vessels were and were not present in the same locations. Similarly, the electrical resistivity was not significantly different when two transects with vessels were compared or two transects without. Thus, the electrical resistivity data provide further evidence that the vessels induce SSC in the ship channel. The quantifications of SSC and flux and statistical significance of electrical resistivity differences highlight the importance of propeller wash contributions to persistent shoaling issues in the HSC and provide an opportunity to further develop prediction tools for sediment movement and management guidelines on how to mitigate siltation in our Nation’s waterways. AN - dot:89744 ET - Final Project Report January 29, 2026 KW - Ships KW - Acoustics KW - Doppler navigation KW - Resistivity method KW - Suspended sediments KW - Ports KW - Waterways KW - Vessel operations KW - Sedimentation KW - Ship Channel Shoaling KW - Field Measurements KW - Doppler Current Profiler KW - Resistivity Probe KW - Galveston Bay Texas KW - Houston Ship Channel LA - English PB - CREATE - Coastal REsearch And Transportation Education PY - 2026-03-23 SN - 2301-8 TI - Quantifying Vessel Propeller Wash Impacts on Sedimentation in Shallow-Bay Ports and Waterways M3 - Tech Report N1 - United States N1 - 69A3552348330 UR - https://rosap.ntl.bts.gov/view/dot/89744 ER -
Effects of Extreme Climate Shifts to Pavement Infrastructure in Tennessee

Onyango, Mbakisya ;

Fomunung, Ignatius

2025-09-01 | PDF

Resilient pavement infrastructure is a dream of every transportation agency. Many factors affect the health of pavement infrastructure to include extreme climate shifts. This study evaluated the effects of climate shifts to pavement infrastructure in Tennessee. The study used AASHTOWare PMED software to predict distresses on selected pavement secti ...

03/30/2026

Title : Effects of Extreme Climate Shifts to Pavement Infrastructure in Tennessee Creator(s) : Onyango, Mbakisya;Fomunung, Ignatius;Bathi, Jejal Reddy;Owino, Joseph;Liang, Yu;Otieno, Maxine;Vanga, Maneesha; Corporate Creator(s) : University of Tennessee at Chattanooga Corporate Contributor(s) : Tennessee. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-09-01 Report Number : RES 2023-11 URL : https://rosap.ntl.bts.gov/view/dot/89743 Onyango, Mbakisya et al. (2025). Effects of Extreme Climate Shifts to Pavement Infrastructure in Tennessee. Onyango, Mbakisya et al. "Effects of Extreme Climate Shifts to Pavement Infrastructure in Tennessee" (2025) Onyango, Mbakisya et al. "Effects of Extreme Climate Shifts to Pavement Infrastructure in Tennessee" , 2025 Export RIS Citation Information. TY - Tech Report AU - Onyango, Mbakisya AU - Fomunung, Ignatius AU - Bathi, Jejal Reddy AU - Owino, Joseph AU - Liang, Yu AU - Otieno, Maxine AU - Vanga, Maneesha A2 - University of Tennessee at Chattanooga A3 - Tennessee. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Resilient pavement infrastructure is a dream of every transportation agency. Many factors affect the health of pavement infrastructure to include extreme climate shifts. This study evaluated the effects of climate shifts to pavement infrastructure in Tennessee. The study used AASHTOWare PMED software to predict distresses on selected pavement sections in Tennessee using historical MERRA climate data (or baseline) and machine learning projected climate scenarios. Results showed that pavement sections of the baseline scenario performed at an acceptable level to the end of design period. Climate data projections used machine learning models to predict five climate inputs: temperature, wind speed, percent sunshine, precipitation, and humidity from 2024 to 2044. NeuralProphet and LSTM models were selected for the study. However, the models did not capture peak temperatures accurately. A hybrid model, based on a Variational Autoencoder (VAE) with LSTM layers, gave more accurate results capturing peak temperatures. The VAE compressed the large climate dataset into a smaller representation to capture seasonal and temporal patterns, and the LSTM encoder learned the sequential climate data and reconstructed the values while keeping these critical weather patterns. Comparative analysis between historical and projected climate data files indicated that the projected climate data predicted distresses that were higher than historical climate data; however, the difference was not statistically significant and did not exceed the distress threshold at the end of design period. This indicates that there is no immediate need to change design and maintenance parameters for Tennessee, but close monitoring of weather events and improving severely distressed sections may be required. Moreover, historical climate data can still be successfully used to design pavements. Tennessee maintenance data showed a state average PSI of 3.35 and strong negative correlation of 68% between PSI and IRI, meaning PSI decreases with increase in IRI. AN - dot:89743 ET - Final Report: September 2025 KW - Climate change KW - Forecasting KW - Machine learning KW - Pavement performance KW - Data collection KW - Temperature KW - Infrastructure KW - Maintenance KW - Alternatives analysis KW - Transportation departments KW - AASHTOWare PMED LA - English PB - Tennessee. Department of Transportation PY - 2025-09-01 SN - RES 2023-11 TI - Effects of Extreme Climate Shifts to Pavement Infrastructure in Tennessee M3 - Tech Report N1 - United States N1 - RES 2023-11 UR - https://rosap.ntl.bts.gov/view/dot/89743 ER -
Evaluation of Backfill Aggregate Properties

Alshibli, Khalid A. ;

Elkenawi, Mohamed

2026-03-01 | PDF

Open-graded granular backfill materials are widely used as retaining wall backfill due to their high shear strength, high permeability, ease to handle, and compaction characteristics. However, the current Tennessee Department of Transportation (TDOT) provisions assume a conservative angle of internal friction for backfill materials. The objective o ...

03/30/2026

Title : Evaluation of Backfill Aggregate Properties Creator(s) : Alshibli, Khalid A.;Elkenawi, Mohamed; Corporate Creator(s) : University of Tennessee, Knoxville Corporate Contributor(s) : Tennessee. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-03-01 Report Number : RES2024-05 URL : https://rosap.ntl.bts.gov/view/dot/89742 Alshibli, Khalid A. and Elkenawi, Mohamed (2026). Evaluation of Backfill Aggregate Properties. Alshibli, Khalid A. and Elkenawi, Mohamed "Evaluation of Backfill Aggregate Properties" (2026) Alshibli, Khalid A. and Elkenawi, Mohamed "Evaluation of Backfill Aggregate Properties" , 2026 Export RIS Citation Information. TY - Tech Report AU - Alshibli, Khalid A. AU - Elkenawi, Mohamed A2 - University of Tennessee, Knoxville A3 - Tennessee. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Open-graded granular backfill materials are widely used as retaining wall backfill due to their high shear strength, high permeability, ease to handle, and compaction characteristics. However, the current Tennessee Department of Transportation (TDOT) provisions assume a conservative angle of internal friction for backfill materials. The objective of this project was to assess the influence of mineralogy, morphology, and aggregate type on the density and shear strength of fill aggregates from a wide range of supply sources throughout Tennessee. A comprehensive testing program was conducted employing a special large-scale direct shear apparatus to test twenty-six coarse aggregates conforming to the #57 stone gradation, including crushed limestone and river gravel at normal stresses of 35, 70, 105, and 140 kPa and relative densities of 30% and 80%. Particle morphology was quantified using 3D X-ray micro-computed tomography (μCT), enabling the extraction of statistically robust descriptors of roundness, form, and sphericity. The results demonstrate that specific morphology parameters, particularly sphericity location, roundness scale, and form scale, have a measurable and consistent influence on the peak friction angle (ϕp), critical state friction angle (ϕcs), and dilatancy angle (ψ), regardless of the particle size and material origin (mineralogy). Incorporating the 3D morphological indices into linear and nonlinear regression models significantly improved the prediction of ϕp, ϕcs, and ψ across a broad range of granular materials. This report recommends new friction and dilatancy angles for backfill materials depending on the height of the retaining wall and proposes revising current TDOT SP624 provisions for backfill materials compaction and subsequently the backfill zone behind the retaining walls. The percentage reduction in the volume of backfill aggregates for the proposed guidelines is between 24% and 66% depending on the height of the wall and the thickness of its footing. AN - dot:89742 ET - Final Report (8/1/23-3/31/26) KW - Shear strength KW - Aggregates KW - Friction factor KW - Retaining walls KW - Shear strain KW - Open graded aggregates KW - Granular soils KW - Backfill soils KW - Evaluation KW - Soils by properties KW - Friction angle KW - wall backfill LA - English PB - Tennessee. Department of Transportation PY - 2026-03-01 SN - RES2024-05 TI - Evaluation of Backfill Aggregate Properties M3 - Tech Report N1 - United States N1 - 74736 UR - https://rosap.ntl.bts.gov/view/dot/89742 ER -
Lead States Balanced Mix Design (BMD) Peer Exchange: Outcomes Summary

Yin, Fan ;

Hajj, Elie Y

2024-12-01 | PDF

On September 24–25, 2024, seven lead States gathered for a peer exchange in Chesterfield, Missouri, and discussed their activities in advancing Balanced Mix Design (BMD) implementation. The peer exchange was sponsored by the Federal Highway Administration (FHWA). The peer exchange provided an opportunity for lead States to share their implementatio ...

03/30/2026

Title : Lead States Balanced Mix Design (BMD) Peer Exchange: Outcomes Summary Creator(s) : Yin, Fan;Hajj, Elie Y;Aschenbrener, Tim;Harman, Thomas;Nener-Plante, Derek; Corporate Creator(s) : University of Nevada, Reno. Department of Civil and Environmental Engineering Corporate Contributor(s) : United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements Published Date : 2024-12-01 Report Number : FHWA-HIF-25-007 URL : https://rosap.ntl.bts.gov/view/dot/89741 Yin, Fan et al. (2024). Lead States Balanced Mix Design (BMD) Peer Exchange: Outcomes Summary. Yin, Fan et al. "Lead States Balanced Mix Design (BMD) Peer Exchange: Outcomes Summary" (2024) Yin, Fan et al. "Lead States Balanced Mix Design (BMD) Peer Exchange: Outcomes Summary" , 2024 Export RIS Citation Information. TY - Tech Report AU - Yin, Fan AU - Hajj, Elie Y AU - Aschenbrener, Tim AU - Harman, Thomas AU - Nener-Plante, Derek A2 - University of Nevada, Reno. Department of Civil and Environmental Engineering A3 - United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements A4 - Aschenbrener, Timothy B. AB - On September 24–25, 2024, seven lead States gathered for a peer exchange in Chesterfield, Missouri, and discussed their activities in advancing Balanced Mix Design (BMD) implementation. The peer exchange was sponsored by the Federal Highway Administration (FHWA). The peer exchange provided an opportunity for lead States to share their implementation status, lessons learned, and challenges encountered. The State participants also explored strategies to further enhance BMD adoption. This report summarizes key discussions of selected topics and highlights major outcomes of the peer exchange, including main takeaways, effective practices, and critical challenges identified by the lead States for implementing BMD. AN - dot:89741 KW - Mix design KW - Pavement performance KW - Mechanical tests KW - Pavement distress KW - Implementation LA - English PB - United States. Federal Highway Administration. Office of Preconstruction, Construction, and Pavements PY - 2024-12-01 SN - FHWA-HIF-25-007 TI - Lead States Balanced Mix Design (BMD) Peer Exchange: Outcomes Summary M3 - Tech Report N1 - United States N1 - 693JJ32350026 N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89741 ER -
Project 23 Analytical Approach for Qualifying Noise from Advanced Operational Procedures

Morris, Philip J. ;

Hansman, R. John

2016-08-01 | PDF

Noise analysis is one important component of environmental evaluation for new flight procedure design. Communities, airports, regulators. Currently, the Aviation Environmental Design Tool (AEDT) is the primary tools used to evaluate new procedures and traffic intensity levels for calculating noise impact footprints near airports. AEDT noise calcula ...

03/30/2026

Title : Project 23 Analytical Approach for Qualifying Noise from Advanced Operational Procedures Creator(s) : Morris, Philip J.;Hansman, R. John;Sparrow, Victor W.;Botre, Mrunali;Yutko, Brian;Jensen, Luke;Thomas, Jaqueline;Brooks, Cal;Salgueiro, Sandro;Brenner, Morrisa; Corporate Creator(s) : Pennsylvania State University. Department of Aerospace Engineering;Massachusetts Institute of Technology; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment Published Date : 2016-08-01 URL : https://rosap.ntl.bts.gov/view/dot/89740 Morris, Philip J. et al. (2016). Project 23 Analytical Approach for Qualifying Noise from Advanced Operational Procedures. Morris, Philip J. et al. "Project 23 Analytical Approach for Qualifying Noise from Advanced Operational Procedures" (2016) Morris, Philip J. et al. "Project 23 Analytical Approach for Qualifying Noise from Advanced Operational Procedures" , 2016 Export RIS Citation Information. TY - Tech Report AU - Morris, Philip J. AU - Hansman, R. John AU - Sparrow, Victor W. AU - Botre, Mrunali AU - Yutko, Brian AU - Jensen, Luke AU - Thomas, Jaqueline AU - Brooks, Cal AU - Salgueiro, Sandro AU - Brenner, Morrisa A2 - Pennsylvania State University. Department of Aerospace Engineering A2 - Massachusetts Institute of Technology A3 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment AB - Noise analysis is one important component of environmental evaluation for new flight procedure design. Communities, airports, regulators. Currently, the Aviation Environmental Design Tool (AEDT) is the primary tools used to evaluate new procedures and traffic intensity levels for calculating noise impact footprints near airports. AEDT noise calculations use Noise-Power-Distance (NPD) interpolation to calculate noise using engine data generated through flight test and/or analysis. This procedure results in a simple and computationally tractable noise estimation capability for engine noise sources only. Aerodynamic and procedural noise contributions are not fully incorporated into the model. This project involved a collaborative effort involving Penn State University and the Massachusetts Institute of Technology. Penn State had the responsibility to assess the quality of noise predictions made by existing aircraft noise prediction codes. This project involved a collaborative effort involving Penn State University and the Massachusetts Institute of Technology. MIT had responsibility for noise predictions made by existing aircraft noise prediction codes. Both engine noise and airframe noise were examined using different modules in ANOPP. Differences between predictions from different models were quantified. For example, there were noticeable differences between different noise models for landing gear noise that ranged from the simplest, involving no geometric detail, and the models that allowed inclusion of considerable geometric details to be input. AN - dot:89740 ET - Final Report KW - Aircraft noise KW - Calibration KW - Aerodynamic noise KW - Environmental impact analysis KW - Operations research LA - English PB - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment PY - 2016-08-01 TI - Project 23 Analytical Approach for Qualifying Noise from Advanced Operational Procedures M3 - Tech Report N1 - United States N1 - 13-C-AJFE-PSU-018 UR - https://rosap.ntl.bts.gov/view/dot/89740 ER -
Advancing Nighttime Work Zone Safety

United States. Department of Transportation. Federal Highway Administration

2026-02-23 | PDF

Nighttime work zones create extra challenges for transportation agencies, highway workers, and drivers. As agencies shift more work (construction, maintenance, utility) to nighttime to reduce daytime delays, and with more highway workers on the job than in previous years, safety risks for nighttime crews have increased. In 2023, approximately half ...

03/30/2026

Title : Advancing Nighttime Work Zone Safety Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Federal Highway Administration. Center for Accelerating Innovation Contributor(s) : Kapitanov, Martha;Paracha, Jawad; Published Date : 2026-02-23 Report Number : FHWA-26-CAI-006 URL : https://rosap.ntl.bts.gov/view/dot/89739 United States. Department of Transportation. Federal Highway Administration (2026). Advancing Nighttime Work Zone Safety. United States. Department of Transportation. Federal Highway Administration "Advancing Nighttime Work Zone Safety" (2026) United States. Department of Transportation. Federal Highway Administration "Advancing Nighttime Work Zone Safety" , 2026 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Federal Highway Administration. Center for Accelerating Innovation A4 - Kapitanov, Martha A4 - Paracha, Jawad AB - Nighttime work zones create extra challenges for transportation agencies, highway workers, and drivers. As agencies shift more work (construction, maintenance, utility) to nighttime to reduce daytime delays, and with more highway workers on the job than in previous years, safety risks for nighttime crews have increased. In 2023, approximately half of all fatal work zone crashes occurred at night. Nighttime fatigue or impairment in drivers raises the chances of vehicles entering work zones, and lighter traffic volumes can lead to higher speeds, a factor in more than 30% of fatal work zone crashes in 2023. Through the Advancing Nighttime Work Zone Safety initiative, FHWA is helping agencies transform high-hazard work zones into safe, predictable, and efficient workspaces by standardizing how to light and protect them using innovative and effective strategies. AN - dot:89739 KW - Work zone safety KW - Nighttime crashes KW - Traffic safety KW - Work zones LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2026-02-23 SN - FHWA-26-CAI-006 TI - Advancing Nighttime Work Zone Safety M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89739 ER -
Efficacy of Pink Noise and Earplugs for Mitigating the Effects of Intermittent Environmental Noise Exposure on Sleep

Basner, Mathias

;

Smith, Michael G.

2026-02-01 | PDF

Nighttime environmental noise (EN) exposure disturbs sleep and increases morbidity and mortality. Affordable and effective countermeasures are needed, but rigorous research is scarce. This study investigates the efficacy of pink noise (PN) and earplugs for mitigating the effects of intermittent EN on sleep.

03/30/2026

Title : Efficacy of Pink Noise and Earplugs for Mitigating the Effects of Intermittent Environmental Noise Exposure on Sleep Creator(s) : Basner, Mathias;Smith, Michael G.;Cordoza, Makayla;Kayser, Matthew S.;Carlin, Michele;Ecker, Adrian J.;Gilad, Yoni;Park-Chavar, Sierra;Rennie, Ka’alana;Schneller, Victoria;Walsh, Sinead;Shou, Haochang;Cao, Quy;Younes, Magdy;Aeschbach, Daniel;Jones, Christopher W.; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;University of Pennsylvania; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy Published Date : 2026-02-01 Report Number : sag001 DOI : https://doi.org/10.1093/sleep/zsag001 Basner, Mathias et al. (2026). Efficacy of Pink Noise and Earplugs for Mitigating the Effects of Intermittent Environmental Noise Exposure on Sleep. https://doi.org/10.1093/sleep/zsag001 Basner, Mathias et al. "Efficacy of Pink Noise and Earplugs for Mitigating the Effects of Intermittent Environmental Noise Exposure on Sleep" (2026), https://doi.org/10.1093/sleep/zsag001 Basner, Mathias et al. "Efficacy of Pink Noise and Earplugs for Mitigating the Effects of Intermittent Environmental Noise Exposure on Sleep" , 2026, https://doi.org/10.1093/sleep/zsag001 Export RIS Citation Information. TY - Journal Article AU - Basner, Mathias AU - Smith, Michael G. AU - Cordoza, Makayla AU - Kayser, Matthew S. AU - Carlin, Michele AU - Ecker, Adrian J. AU - Gilad, Yoni AU - Park-Chavar, Sierra AU - Rennie, Ka’alana AU - Schneller, Victoria AU - Walsh, Sinead AU - Shou, Haochang AU - Cao, Quy AU - Younes, Magdy AU - Aeschbach, Daniel AU - Jones, Christopher W. A2 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A2 - University of Pennsylvania A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - Nighttime environmental noise (EN) exposure disturbs sleep and increases morbidity and mortality. Affordable and effective countermeasures are needed, but rigorous research is scarce. This study investigates the efficacy of pink noise (PN) and earplugs for mitigating the effects of intermittent EN on sleep. AB - This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) license https://creativecommons.org/licenses/by/4.0/. Please cite this article as: Mathias Basner, Michael G Smith, Makayla Cordoza, Matthew S Kayser, Michele Carlin, Adrian J Ecker, Yoni Gilad, Sierra Park-Chavar, Ka’alana Rennie, Victoria Schneller, Sinead Walsh, Haochang Shou, Quy Cao, Magdy Younes, Daniel Aeschbach, Christopher W Jones, Efficacy of pink noise and earplugs for mitigating the effects of intermittent environmental noise exposure on sleep, Sleep, 2026;, zsag001, https://doi.org/10.1093/sleep/zsag001 AN - dot:89738 DO - https://doi.org/10.1093/sleep/zsag001 KW - Aircraft noise KW - Broadband KW - Noise KW - Environmental impacts KW - Sleep KW - Sleep deprivation KW - ASCENT LA - English PB - Oxford University Press PY - 2026-02-01 SN - sag001 TI - Efficacy of Pink Noise and Earplugs for Mitigating the Effects of Intermittent Environmental Noise Exposure on Sleep M3 - Journal Article N1 - United States N1 - 13-C-AJFE-UPENN-015 N1 - Open Access; https://creativecommons.org/licenses/by/4.0/ UR - https://rosap.ntl.bts.gov/view/dot/89738 ER -
Pilot Sleep Study near Philadelphia International Airport — ASCENT Project 17 Report

Basner, Mathias

;

McGuire, Sarah

2016-08-01 | PDF

New field studies need to be conducted in the US to acquire current data relative to varying degrees of noise exposure to provide information on the effect of noise on sleep. As studies may need to investigate samples around multiple airports it will not be possible to use polysomnography to monitor sleep, as it has a high methodological cost. Inst ...

03/30/2026

Title : Pilot Sleep Study near Philadelphia International Airport — ASCENT Project 17 Report Creator(s) : Basner, Mathias;McGuire, Sarah;Witte, Maryam; Corporate Creator(s) : University of Pennsylvania. School of Medicine Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy; Published Date : 2016-08-01 URL : https://rosap.ntl.bts.gov/view/dot/89737 Basner, Mathias et al. (2016). Pilot Sleep Study near Philadelphia International Airport — ASCENT Project 17 Report. Basner, Mathias and McGuire, Sarah and Witte, Maryam "Pilot Sleep Study near Philadelphia International Airport — ASCENT Project 17 Report" (2016) Basner, Mathias et al. "Pilot Sleep Study near Philadelphia International Airport — ASCENT Project 17 Report" , 2016 Export RIS Citation Information. TY - Tech Report AU - Basner, Mathias AU - McGuire, Sarah AU - Witte, Maryam A2 - University of Pennsylvania. School of Medicine A3 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - New field studies need to be conducted in the US to acquire current data relative to varying degrees of noise exposure to provide information on the effect of noise on sleep. As studies may need to investigate samples around multiple airports it will not be possible to use polysomnography to monitor sleep, as it has a high methodological cost. Instead, the use of actigraphy and electrocardiography (ECG) has been examined. This approach is cost-effective, as individuals can be taught how to use the equipment on their own, and will allow a methodologically sound investigation of large subject cohorts to be investigated. This methodology was implemented in a pilot study conducted around Philadelphia International Airport. Eighty participants were recruited for the study, 40 from a region with aircraft noise exposure near the airport and 40 from a control region in Philadelphia County. Participants completed 3 nights of unattended physiological and noise measurements. The primary purpose of this study was to evaluate the feasibility of the ECG and actigraphy methodology. It was found that study participants could complete the measurements on their own with minimal data loss. AN - dot:89737 KW - Aircraft noise KW - Sleep deprivation KW - Field studies KW - Logistic regression analysis KW - Airport noise KW - ASCENT LA - English PB - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment PY - 2016-08-01 TI - Pilot Sleep Study near Philadelphia International Airport — ASCENT Project 17 Report M3 - Tech Report N1 - United States N1 - 13-C-AJFE-UPenn-002 UR - https://rosap.ntl.bts.gov/view/dot/89737 ER -
Multi-Objective Decision Analysis and Optimization Model for Transportation Investment Decision-Making at MDOT

Robert, William ;

Bliss, Abigail

2026-01-29 | PDF

Multi-objective decision analysis (MODA) provides transportation agencies with a structured process for identifying a set of investments that delivers the greatest impact toward their objectives. In the presented research, the research team developed a prototype MODA-based approach for prioritizing pavement rehabilitation and reconstruction project ...

03/30/2026

Title : Multi-Objective Decision Analysis and Optimization Model for Transportation Investment Decision-Making at MDOT Creator(s) : Robert, William;Bliss, Abigail;Morrison, Constance; Corporate Creator(s) : Spy Pond Partners, LLC Corporate Contributor(s) : Michigan Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-01-29 Report Number : SPR-1764 URL : https://rosap.ntl.bts.gov/view/dot/89736 Robert, William et al. (2026). Multi-Objective Decision Analysis and Optimization Model for Transportation Investment Decision-Making at MDOT. Robert, William and Bliss, Abigail and Morrison, Constance "Multi-Objective Decision Analysis and Optimization Model for Transportation Investment Decision-Making at MDOT" (2026) Robert, William et al. "Multi-Objective Decision Analysis and Optimization Model for Transportation Investment Decision-Making at MDOT" , 2026 Export RIS Citation Information. TY - Tech Report AU - Robert, William AU - Bliss, Abigail AU - Morrison, Constance A2 - Spy Pond Partners, LLC A3 - Michigan Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Multi-objective decision analysis (MODA) provides transportation agencies with a structured process for identifying a set of investments that delivers the greatest impact toward their objectives. In the presented research, the research team developed a prototype MODA-based approach for prioritizing pavement rehabilitation and reconstruction projects at the Michigan Department of Transportation (MDOT). Research activities included a review of best practices and MODA applications, development of goals and measures for quantifying projects’ anticipated impacts, and implementation and evaluation of the proposed MODA approach using 39 test projects. The research demonstrated that a MODA-based approach can be used to assess and prioritize the target set of projects based on their anticipated asset condition, safety, accessibility and mobility, and environmental impacts. Further research could include implementation and evaluation of the proposed approach with additional data or decision-support tools, as well as adaptation of the MODA approach to other program areas at MDOT. AN - dot:89736 ET - Final Report, 1/30/2024 - 1/30/2026 KW - Resource allocation KW - Project management KW - Decision making KW - Asset management KW - Transportation system management KW - Analysis KW - Optimization KW - Data analysis KW - project prioritization KW - multi-objective decision analysis KW - transportation asset management LA - English PB - Michigan Department of Transportation. Research Administration PY - 2026-01-29 SN - SPR-1764 TI - Multi-Objective Decision Analysis and Optimization Model for Transportation Investment Decision-Making at MDOT M3 - Tech Report N1 - United States N1 - 2024-0192 UR - https://rosap.ntl.bts.gov/view/dot/89736 ER -
Beyond Bid-Build: Innovative Project Delivery Methods

United States. Department of Transportation. Federal Highway Administration

2026-02-20 | PDF

Many transportation agencies face tight budgets, price swings, staff shortages, and the loss of experienced workers, making it harder to deliver infrastructure projects efficiently. Traditionally, government contracts are awarded to the qualified lowest-priced bidder, but when bidders try too hard to offer the lowest price, they may underestimate t ...

03/30/2026

Title : Beyond Bid-Build: Innovative Project Delivery Methods Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Federal Highway Administration. Center for Accelerating Innovation Contributor(s) : Weisner, Kat;DeSanto, James;Urban, Melinda; Published Date : 2026-02-20 Report Number : FHWA-26-CAI-001 URL : https://rosap.ntl.bts.gov/view/dot/89735 United States. Department of Transportation. Federal Highway Administration (2026). Beyond Bid-Build: Innovative Project Delivery Methods. United States. Department of Transportation. Federal Highway Administration "Beyond Bid-Build: Innovative Project Delivery Methods" (2026) United States. Department of Transportation. Federal Highway Administration "Beyond Bid-Build: Innovative Project Delivery Methods" , 2026 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Federal Highway Administration. Center for Accelerating Innovation A4 - Weisner, Kat A4 - DeSanto, James A4 - Urban, Melinda AB - Many transportation agencies face tight budgets, price swings, staff shortages, and the loss of experienced workers, making it harder to deliver infrastructure projects efficiently. Traditionally, government contracts are awarded to the qualified lowest-priced bidder, but when bidders try too hard to offer the lowest price, they may underestimate the work. This can lead to lower-quality results, contract changes, delays, and higher costs, especially on complex projects. Alternative Contracting Methods (ACMs) offer a more strategic approach, allowing agencies to tailor procurement to a project’s unique circumstances, helping agencies meet their goals faster, smarter, and with better long-term results. AN - dot:89735 KW - Project delivery KW - Innovation KW - Design bid build KW - Contracting LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2026-02-20 SN - FHWA-26-CAI-001 TI - Beyond Bid-Build: Innovative Project Delivery Methods M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89735 ER -
Highway Construction Workforce Partnership: Strategic Workforce Development: Recruiting Tomorrow's Highway Construction Workforce

United States. Department of Transportation. Federal Highway Administration

2021-08-11 | PDF

Maintaining a strong, capable highway construction workforce keeps the nation’s transportation industry and economy moving forward. In an effort to identify, train, and place qualified individuals into needed roles, the U.S. Department of Transportation’s Federal Highway Administration (FHWA) established the Highway Construction Workforce Partnersh ...

03/30/2026

Title : Highway Construction Workforce Partnership: Strategic Workforce Development: Recruiting Tomorrow's Highway Construction Workforce Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Caliendo, Michael;Chavez, Robert;Koss, Jason; Published Date : 2021-08-11 URL : https://rosap.ntl.bts.gov/view/dot/89734 United States. Department of Transportation. Federal Highway Administration (2021). Highway Construction Workforce Partnership: Strategic Workforce Development: Recruiting Tomorrow's Highway Construction Workforce. United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Recruiting Tomorrow's Highway Construction Workforce" (2021) United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Recruiting Tomorrow's Highway Construction Workforce" , 2021 Export RIS Citation Information. TY - Tech Report A2 - United States. Department of Transportation. Federal Highway Administration A4 - Caliendo, Michael A4 - Chavez, Robert A4 - Koss, Jason AB - Maintaining a strong, capable highway construction workforce keeps the nation’s transportation industry and economy moving forward. In an effort to identify, train, and place qualified individuals into needed roles, the U.S. Department of Transportation’s Federal Highway Administration (FHWA) established the Highway Construction Workforce Partnership (HCWP). By bringing together highway construction, education, and workforce interests at state and local levels, partner working groups form to identify needs and resources to fill industry workforce gaps. HCWPs in Idaho, Los Angeles, and Pittsburgh have refined recruitment to maintain a consistent flow of applicants for highway construction positions. AN - dot:89734 KW - Education and training KW - Training KW - Road construction KW - Road construction industry KW - Transportation careers LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2021-08-11 TI - Highway Construction Workforce Partnership: Strategic Workforce Development: Recruiting Tomorrow's Highway Construction Workforce M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89734 ER -
Highway Construction Workforce Partnership: Strategic Workforce Development: Texas's ConnectU2Jobs Program Changes Lives through Community Partnerships

United States. Department of Transportation. Federal Highway Administration

2022-04-04 | PDF

Keeping a constant flow of skilled individuals ready to enter the highway construction workforce is critical to maintaining safe roadways in Texas. To help meet that need and offer lasting career potential to individuals who typically may not be provided such options, the Texas Department of Transportation (TxDOT) established its ConnectU2Jobs prog ...

03/30/2026

Title : Highway Construction Workforce Partnership: Strategic Workforce Development: Texas's ConnectU2Jobs Program Changes Lives through Community Partnerships Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2022-04-04 URL : https://rosap.ntl.bts.gov/view/dot/89733 United States. Department of Transportation. Federal Highway Administration (2022). Highway Construction Workforce Partnership: Strategic Workforce Development: Texas's ConnectU2Jobs Program Changes Lives through Community Partnerships. United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Texas's ConnectU2Jobs Program Changes Lives through Community Partnerships" (2022) United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Texas's ConnectU2Jobs Program Changes Lives through Community Partnerships" , 2022 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration AB - Keeping a constant flow of skilled individuals ready to enter the highway construction workforce is critical to maintaining safe roadways in Texas. To help meet that need and offer lasting career potential to individuals who typically may not be provided such options, the Texas Department of Transportation (TxDOT) established its ConnectU2Jobs program. The Highway Construction Workforce Partnership (HCWP) includes TxDOT, Federal Highway Administration (FHWA), Texas Workforce Commission, Dallas College, Workforce Solutions Greater Dallas, Regional Black Contractors Association, Regional Hispanic Contractors Association, Lone Star Justice Alliance, and Associated General Contractors of Texas. AN - dot:89733 KW - Education and training KW - Training KW - Road construction KW - Road construction industry KW - Transportation careers KW - Partnerships LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2022-04-04 TI - Highway Construction Workforce Partnership: Strategic Workforce Development: Texas's ConnectU2Jobs Program Changes Lives through Community Partnerships M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89733 ER -
Flammability of Aircraft Insulation Blankets Subjected to Electrical Arc Ignition Sources

Cahill, Patricia

2000-04-01 | PDF

In the fall of 1998, the Federal Aviation Administration (FAA) initiated a program of intense testing, i.e., full-scale testing, intermediate testing, bench-scale testing, and electrical ignition testing on thermal acoustical insulation. This work was prompted by several factors related to current fire test requirements, including the crash of the ...

03/30/2026

Title : Flammability of Aircraft Insulation Blankets Subjected to Electrical Arc Ignition Sources Creator(s) : Cahill, Patricia Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 2000-04-01 Report Number : DOT/FAA/AR-TN00/20 URL : https://rosap.ntl.bts.gov/view/dot/89732 Cahill, Patricia (2000). Flammability of Aircraft Insulation Blankets Subjected to Electrical Arc Ignition Sources. Cahill, Patricia "Flammability of Aircraft Insulation Blankets Subjected to Electrical Arc Ignition Sources" (2000) Cahill, Patricia "Flammability of Aircraft Insulation Blankets Subjected to Electrical Arc Ignition Sources" , 2000 Export RIS Citation Information. TY - Tech Report AU - Cahill, Patricia A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. Airport and Aircraft Safety Research and Development Division. A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - In the fall of 1998, the Federal Aviation Administration (FAA) initiated a program of intense testing, i.e., full-scale testing, intermediate testing, bench-scale testing, and electrical ignition testing on thermal acoustical insulation. This work was prompted by several factors related to current fire test requirements, including the crash of the Swissair MD-11 off the coast of Canada, and the failure of an industry fire test standard called the cotton swab test to characterize the flammability characteristics of a certain foam and fiberglass cover material. Electrical testing was an important part of this program due to the number of reported incidents involving flame spread on thermal acoustical insulation blankets caused by electrical failures such as short circuits. The thermal acoustical insulation films tested in this program were polyimide, metallized and nonmetallized polyester poly (ethylene terepthalate) (PET) and metallized poly (vinyl fluoride) (PVF). Each of these materials was used to fabricate test blankets with 0.42 pound per cubic foot (pcf) fiberglass batting. The test blankets were subjected to 115-and 208-volt electrical arcing tests. This same testing was performed on these blankets with a corrosion inhibiting compound (CIC) sprayed on them. The data showed that the metallized PET blankets ignited with significant flame spread at both voltages with and without CIC. The polyimide and metallized PVF blankets did not ignite at either voltage when tested plain or with CIC application. The plain PET blankets ignited at both voltages, with minimal flame spread, and the fire self-extinguished within seconds. When tested with CIC at 115 volts, flaming in the seam area occurred but self-extinguished within seconds. No ignition occurred at 208 volts. AN - dot:89732 ET - Technical Note KW - Acoustic materials KW - Sound insulating materials KW - Aircraft KW - Insulation blankets KW - Corrosion resistant materials KW - Electric arcs KW - Flammability tests KW - Ignition KW - Polyester resins KW - Protective coating KW - Heat insulating materials KW - Arc discharges KW - Blankets KW - Corrosion inhibitors KW - PET(Poly(ethylene KW - PVF(Poly(vinyl fluoride)) LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2000-04-01 SN - DOT/FAA/AR-TN00/20 TI - Flammability of Aircraft Insulation Blankets Subjected to Electrical Arc Ignition Sources M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89732 ER -
Resilient Modulus of Coarse-Grained Subgrade Soils for Pavement Design

Hossain, M. Shabbir ;

Nair, Harikrishnan

2026-03-01 | PDF

In 2018, the Virginia Department of Transportation (VDOT) implemented the American Association of State Highway and Transportation Officials’ (AASHTO) AASHTOWare-ME version 2.2.6 as the pavement design methodology for new, reconstruction, and lane-widening projects, including interstate, primary, and secondary routes with annual average daily traff ...

03/30/2026

Title : Resilient Modulus of Coarse-Grained Subgrade Soils for Pavement Design Creator(s) : Hossain, M. Shabbir;Nair, Harikrishnan; Corporate Creator(s) : Virginia Transportation Research Council (VTRC) Corporate Contributor(s) : Virginia. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-03-01 Report Number : FHWA/VTRC 26-R35 URL : https://rosap.ntl.bts.gov/view/dot/89731 Hossain, M. Shabbir and Nair, Harikrishnan (2026). Resilient Modulus of Coarse-Grained Subgrade Soils for Pavement Design. Hossain, M. Shabbir and Nair, Harikrishnan "Resilient Modulus of Coarse-Grained Subgrade Soils for Pavement Design" (2026) Hossain, M. Shabbir and Nair, Harikrishnan "Resilient Modulus of Coarse-Grained Subgrade Soils for Pavement Design" , 2026 Export RIS Citation Information. TY - Tech Report AU - Hossain, M. Shabbir AU - Nair, Harikrishnan A2 - Virginia Transportation Research Council (VTRC) A3 - Virginia. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - In 2018, the Virginia Department of Transportation (VDOT) implemented the American Association of State Highway and Transportation Officials’ (AASHTO) AASHTOWare-ME version 2.2.6 as the pavement design methodology for new, reconstruction, and lane-widening projects, including interstate, primary, and secondary routes with annual average daily traffic greater than 10,000 vehicles. The Mechanistic-Empirical Pavement Design Guide (MEPDG) and the AASHTOWare Pavement ME software provided an improved process for conducting pavement analysis and for developing pavement designs based on mechanistic-empirical principles. To facilitate the pavement design, MEPDG recommends the resilient modulus (Mr) to characterize the subgrade soils. As part of VDOT’s MEPDG implementation efforts, the Materials Division Soils Lab collected both fine-and coarse-grained soil samples from around the state on which to perform Mr tests. For fine-grained soils (A-4, A-5, A-6, and A-7), a correlation with unconfined compression strength was developed in a Virginia Transportation Research Council study that is currently being used to estimate design Mr for high-volume projects (annual average daily traffic > 10,000) as an alternative to actual Mr testing. Also, enough fine-grained soils were tested to determine statewide average Mr values to be used in the design of low-volume roadways (annual average daily traffic < 10,000). However, no statewide average Mr values or correlations are currently available for coarse-grained soils (A-1, A-2, and A-3). Although some actual measured Mr values of coarse-grained soil are available, they are significantly less than AASHTO-recommended Mr values (MEPDG default), which needs to be further investigated. During this study, six coarse-grained soil samples were tested for Mr at standard Proctor compactive effort: three A-2-4, one A-26, and two A-3. The Mr values at a confining pressure of 2 psi and a deviator stress of 6 psi were less than MEPDG-recommended default values, but they are comparable with measured values reported in the literature. Sample compaction density and moisture influenced the Mr values. The Mr value of any coarse-grained soil showed a decreasing trend with increasing degrees of saturation, a combining measure of compaction density and moisture. A few soil index properties showed good correlation with Mr values. A predictive model could not be recommended because of limited data points, that is, only six soil samples. AN - dot:89731 ET - Final report: November 2022 -October 2025 KW - Pavement subgrade KW - Modulus of resilience KW - Coarse grained soils KW - Pavement design KW - Mechanistic-empirical pavement design KW - Testing KW - Mathematical prediction LA - English PB - Virginia Transportation Research Council (VTRC) PY - 2026-03-01 SN - FHWA/VTRC 26-R35 TI - Resilient Modulus of Coarse-Grained Subgrade Soils for Pavement Design M3 - Tech Report N1 - United States N1 - 122364 UR - https://rosap.ntl.bts.gov/view/dot/89731 ER -
Project 42 Acoustical Model of Mach Cut-off Flight

Sparrow, Victor W. ;

Bailey, Michael

2017-08-01 | PDF

Georgia Tech has completed the research plan for this task. Georgia Tech has also acquired both the source code and executable for PCBoom 6.7. PCBoom 6.7 was used to perform the sensitivity analysis on the acoustical model provided by Aerion, Volpe, and Penn State University. Georgia Tech completed the initial benchmarking study for the sensitivity ...

03/30/2026

Title : Project 42 Acoustical Model of Mach Cut-off Flight Creator(s) : Sparrow, Victor W.;Bailey, Michael;Mavris, Dimitri N.;Page, Juliet A.;Vigeant, Michelle C.;Tai, Jimmy;Busch, Greg;Huang, Zhendong;Ortega, Nick;Duca, Ruxandra;Mohan, Ratheesvar; Corporate Creator(s) : Georgia Tech Research Corporation;Pennsylvania State University;University of Washington;John A. Volpe National Transportation Systems Center (U.S.); Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy; Published Date : 2017-08-01 URL : https://rosap.ntl.bts.gov/view/dot/89730 Sparrow, Victor W. et al. (2017). Project 42 Acoustical Model of Mach Cut-off Flight. Sparrow, Victor W. et al. "Project 42 Acoustical Model of Mach Cut-off Flight" (2017) Sparrow, Victor W. et al. "Project 42 Acoustical Model of Mach Cut-off Flight" , 2017 Export RIS Citation Information. TY - Tech Report AU - Sparrow, Victor W. AU - Bailey, Michael AU - Mavris, Dimitri N. AU - Page, Juliet A. AU - Vigeant, Michelle C. AU - Tai, Jimmy AU - Busch, Greg AU - Huang, Zhendong AU - Ortega, Nick AU - Duca, Ruxandra AU - Mohan, Ratheesvar A2 - Georgia Tech Research Corporation A2 - Pennsylvania State University A2 - University of Washington A2 - John A. Volpe National Transportation Systems Center (U.S.) A3 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - Georgia Tech has completed the research plan for this task. Georgia Tech has also acquired both the source code and executable for PCBoom 6.7. PCBoom 6.7 was used to perform the sensitivity analysis on the acoustical model provided by Aerion, Volpe, and Penn State University. Georgia Tech completed the initial benchmarking study for the sensitivity of Mach cut-off flight on a standard sonic boom signature (F-18 geometry provided with the executable). Georgia Tech assessed the sensitivity of the resultant ground boom strength and shape of the F-18 model with variations in atmospheric temperature and humidity as well as various flight Mach numbers. A tool to help facilitate the execution of task 4, the PCBoom wrapper, was developed and utilized. The Aerion AS2 model was successfully incorporated into the study, and the sensitivity of the model was assessed for both Mach cut-on and Mach cut-off conditions. The sensitivity study was performed and completed for various temperatures, winds, and relative humidity in both standard atmospheric profiles and realistic atmospheric profiles. The results of the study were compiled and presented in this report. Task 5 was completed through extensive research into various technologies that could help enable Mach cut-off flight. Insight on many of the technologies was solicited from scientists and researcher in the atmospheric sciences. The most promising technologies were investigated further, and a summary of those technologies is presented in this report. AN - dot:89730 KW - Acoustics KW - Aircraft noise KW - Supersonic aircraft KW - Mach number KW - Aviation KW - ASCENT LA - English PB - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment PY - 2017-08-01 TI - Project 42 Acoustical Model of Mach Cut-off Flight M3 - Tech Report N1 - United States N1 - 13-C-AJFE-GIT-023 UR - https://rosap.ntl.bts.gov/view/dot/89730 ER -
Project 010 Aircraft Technology Modeling and Assessment

Mavris, Dimitri N.

;

Crossley, William

2023-12-01 | PDF

For duration of Project 10’s period of performance, the research activities have remained consistent on technology modeling, system level assessment and fleet level modeling. These activities were conducted for subsonic fleet from 2014 to 2017 and focused on supersonic fleet from 2017 to 2023. The final report focuses on the latter in which Georgia ...

03/30/2026

Title : Project 010 Aircraft Technology Modeling and Assessment Creator(s) : Mavris, Dimitri N.;Crossley, William;Tai, Jimmy C.;DeLaurentis, Daniel;Ahuja, Jai;Perron, Christian;Lee, Chung;Stewart, Brennan;Kenny, James D.;Pfaender, Holger;Baltman, Edan;Azevedo, Joao de;Sampaio, Barbara;Vlady, Ted;Iyengar, Nikhil;Roohi, Zayne;Varadharajan, Srikanth Tindivanam;Tegen, Carter J.;Kalaria, Divya K.;Macy, Madeleine E. Graham;Mane, Muharrem;Fung, Tien-Yueh;Doma, Krinal; Corporate Creator(s) : Georgia Institute of Technology Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment Published Date : 2023-12-01 URL : https://rosap.ntl.bts.gov/view/dot/89729 Mavris, Dimitri N. et al. (2023). Project 010 Aircraft Technology Modeling and Assessment. Mavris, Dimitri N. et al. "Project 010 Aircraft Technology Modeling and Assessment" (2023) Mavris, Dimitri N. et al. "Project 010 Aircraft Technology Modeling and Assessment" , 2023 Export RIS Citation Information. TY - Tech Report AU - Mavris, Dimitri N. AU - Crossley, William AU - Tai, Jimmy C. AU - DeLaurentis, Daniel AU - Ahuja, Jai AU - Perron, Christian AU - Lee, Chung AU - Stewart, Brennan AU - Kenny, James D. AU - Pfaender, Holger AU - Baltman, Edan AU - Azevedo, Joao de AU - Sampaio, Barbara AU - Vlady, Ted AU - Iyengar, Nikhil AU - Roohi, Zayne AU - Varadharajan, Srikanth Tindivanam AU - Tegen, Carter J. AU - Kalaria, Divya K. AU - Macy, Madeleine E. Graham AU - Mane, Muharrem AU - Fung, Tien-Yueh AU - Doma, Krinal A2 - Georgia Institute of Technology A3 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment AB - For duration of Project 10’s period of performance, the research activities have remained consistent on technology modeling, system level assessment and fleet level modeling. These activities were conducted for subsonic fleet from 2014 to 2017 and focused on supersonic fleet from 2017 to 2023. The final report focuses on the latter in which Georgia Tech and Purdue University teams have partnered to investigate the future demand for supersonic air travel and the environmental impacts of supersonic transports (SSTs). The combined team investigated the environmental impacts include direct carbon dioxide (CO2) emissions, noise, and fuel consumption. The primary objective of this research project is to support the FAA in modeling and assessing the potential future evolution of the next-generation supersonic aircraft fleet. The research in this project consists of five integrated focus areas: (a) establishing fleet assumptions and performing demand assessment (completed in 2021); (b) performing preliminary SST environmental impact prediction (completed in 2023); (c) developing approaches to model SSTs within the FAA Aviation Environmental Design Tool (completed in 2022); (d) performing vehicle and fleet assessments of potential future supersonic aircraft (completed in this report); and (e) performing physics-based modeling of SSTs and conceptual design by using the Framework for Advanced Supersonic Transport (FASST) (completed in the report). AN - dot:89729 ET - Final Report KW - Sonic boom KW - Aerodynamic noise KW - Aircraft noise KW - Civil aviation KW - Environmental impacts KW - Standards KW - Supersonic aircraft LA - English PB - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment PY - 2023-12-01 TI - Project 010 Aircraft Technology Modeling and Assessment M3 - Tech Report N1 - United States N1 - 13-C-AJFE-GIT-006 UR - https://rosap.ntl.bts.gov/view/dot/89729 ER -
Updates in Assessing Soil Organic Carbon and Their Implications for Evaluating Land Use Change Emissions

Benavidez-Brouk, Lauren

;

Taheripour, Farzad

2026-02-01 | PDF

Emissions from land use changes are relevant for environmental policy analysis. Since the late 1990s and early 2000s many of these analyses have examined induced land use changes (ILUC) from biofuel production and policy as well as their associated greenhouse gas (GHG) emissions. These studies have often used the Harmonized World Soil Data (HWSD) t ...

03/30/2026

Title : Updates in Assessing Soil Organic Carbon and Their Implications for Evaluating Land Use Change Emissions Creator(s) : Benavidez-Brouk, Lauren;Taheripour, Farzad;Baldos, Uris;Zhuang, Qianlai;Chen, Shuo; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;Purdue University; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy Published Date : 2026-02-01 Report Number : ERC8 025013 DOI : https://doi.org/10.1088/2515-7620/ae3d84 Benavidez-Brouk, Lauren et al. (2026). Updates in Assessing Soil Organic Carbon and Their Implications for Evaluating Land Use Change Emissions. https://doi.org/10.1088/2515-7620/ae3d84 Benavidez-Brouk, Lauren et al. "Updates in Assessing Soil Organic Carbon and Their Implications for Evaluating Land Use Change Emissions" (2026), https://doi.org/10.1088/2515-7620/ae3d84 Benavidez-Brouk, Lauren et al. "Updates in Assessing Soil Organic Carbon and Their Implications for Evaluating Land Use Change Emissions" , 2026, https://doi.org/10.1088/2515-7620/ae3d84 Export RIS Citation Information. TY - Journal Article AU - Benavidez-Brouk, Lauren AU - Taheripour, Farzad AU - Baldos, Uris AU - Zhuang, Qianlai AU - Chen, Shuo A2 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A2 - Purdue University A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - Emissions from land use changes are relevant for environmental policy analysis. Since the late 1990s and early 2000s many of these analyses have examined induced land use changes (ILUC) from biofuel production and policy as well as their associated greenhouse gas (GHG) emissions. These studies have often used the Harmonized World Soil Data (HWSD) to evaluate the corresponding changes in soil organic carbon (SOC) as a part of their assessments. However, those modeling efforts that used this data set have not necessarily implemented its latest version, and therefore, their results may not represent the most recent available SOC data sources. As an example, the AEZ-EF model, which has been frequently used in assessing ILUC emissions, is using the oldest version of this data set. To improve the quality and accuracy of ILUC estimates, this paper creates a new global data set of SOC by combining the latest version of the HWSD (V.2.0) with newly available national soil maps for the USA and Australia. Using this new data set, we then calculate the average SOC for each land cover type (cropland, pasture, and forest) by country and by agro-ecological zones (AEZs). Furthermore, we revised AEZ-EF model to adopt the new SOC data by land types. Finally, the revised AEZ-EF model is used to assess ILUC emissions for a few biofuel pathways to demonstrate the extent to which the new SOC data may affect ILUC emissions. The results of this paper indicate that the newest version of the HWSD represents a lower level of SOC at the global scale compared to its older version. The results also show that the revised AEZ-EF model calculates relatively lower ILUC emissions for the examined pathways compared to its older version. AB - This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) license https://creativecommons.org/licenses/by/4.0/. Please cite this article as: Lauren Benavidez-Brouk et al 2026 Environ. Res. Commun. 8 025013. https://doi.org/10.1088/2515-7620/ae3d84 AN - dot:89728 DO - https://doi.org/10.1088/2515-7620/ae3d84 KW - Land use KW - Pollutants KW - Environmental impacts KW - Soil remediation KW - Biomass fuels KW - ASCENT LA - English PB - IOP Publishing PY - 2026-02-01 SN - ERC8 025013 TI - Updates in Assessing Soil Organic Carbon and Their Implications for Evaluating Land Use Change Emissions M3 - Journal Article N1 - United States N1 - 13-C-AJFE-PU-058 N1 - Open Access; https://creativecommons.org/licenses/by/4.0/ UR - https://rosap.ntl.bts.gov/view/dot/89728 ER -
Integrated Digital Project Delivery

United States. Department of Transportation. Federal Highway Administration

2026-02-23 | PDF

Despite the widespread use of basic digital tools, many transportation projects still face delays and data gaps throughout the planning, development, and maintenance process. The current paper and PDF-based workflows require staff to manually re-enter the same information into multiple systems. This increases the risk of errors and slows down proje ...

03/30/2026

Title : Integrated Digital Project Delivery Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Corporate Contributor(s) : United States. Federal Highway Administration. Center for Accelerating Innovation Contributor(s) : Gray, James;Corrigan, Matthew; Published Date : 2026-02-23 Report Number : FHWA-26-CAI-004 URL : https://rosap.ntl.bts.gov/view/dot/89727 United States. Department of Transportation. Federal Highway Administration (2026). Integrated Digital Project Delivery. United States. Department of Transportation. Federal Highway Administration "Integrated Digital Project Delivery" (2026) United States. Department of Transportation. Federal Highway Administration "Integrated Digital Project Delivery" , 2026 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A3 - United States. Federal Highway Administration. Center for Accelerating Innovation A4 - Gray, James A4 - Corrigan, Matthew AB - Despite the widespread use of basic digital tools, many transportation projects still face delays and data gaps throughout the planning, development, and maintenance process. The current paper and PDF-based workflows require staff to manually re-enter the same information into multiple systems. This increases the risk of errors and slows down project updates. Important data for bridges, pavements, and utilities is often stored in separate databases, making it hard to find one shared, reliable source of information. In addition, many State agencies’ software systems used for design, construction, and asset management, do not work well together, limiting the ability to share 3D models. Outdated survey and design manuals fail to reflect current tools and technologies like LiDAR, 3D modeling, and Unmanned Aerial Systems (UAS). The Integrated Digital Project Delivery initiative addresses these challenges by creating a connected, consistent approach to managing project data from early planning to long-term maintenance. AN - dot:89727 KW - Integrated project delivery KW - Project management KW - Data management KW - Data sharing LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2026-02-23 SN - FHWA-26-CAI-004 TI - Integrated Digital Project Delivery M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89727 ER -
Spray and Soot Characteristics of Liquid Spray Flames in a High-Pressure Sector Combustor

Vishwanath, Rahul ;

Olimid, Dominic

2025-03-01 | PDF

Conventional aviation combustors use liquid fuels where spray atomization is important for efficient combustion process and resultant emissions. In this study, a three-sector combustor with commercial pre-filming air blast injectors is utilized to analyze the effect of operating conditions on spray and soot formation. Measurements are performed wit ...

03/30/2026

Title : Spray and Soot Characteristics of Liquid Spray Flames in a High-Pressure Sector Combustor Creator(s) : Vishwanath, Rahul;Olimid, Dominic;Douglas, Eric;Bibik, Oleksandr;Wehe, Shawn;Mazumdar, Yi Chen;Steinberg, Adam;Sun, Wenting; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;Georgia Institute of Technology; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy Published Date : 2025-03-01 Report Number : 1C09-110490475 URL : https://rosap.ntl.bts.gov/view/dot/89726 Vishwanath, Rahul et al. (2025). Spray and Soot Characteristics of Liquid Spray Flames in a High-Pressure Sector Combustor. Vishwanath, Rahul et al. "Spray and Soot Characteristics of Liquid Spray Flames in a High-Pressure Sector Combustor" (2025) Vishwanath, Rahul et al. "Spray and Soot Characteristics of Liquid Spray Flames in a High-Pressure Sector Combustor" , 2025 Export RIS Citation Information. TY - Proceedings AU - Vishwanath, Rahul AU - Olimid, Dominic AU - Douglas, Eric AU - Bibik, Oleksandr AU - Wehe, Shawn AU - Mazumdar, Yi Chen AU - Steinberg, Adam AU - Sun, Wenting A2 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A2 - Georgia Institute of Technology A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - Conventional aviation combustors use liquid fuels where spray atomization is important for efficient combustion process and resultant emissions. In this study, a three-sector combustor with commercial pre-filming air blast injectors is utilized to analyze the effect of operating conditions on spray and soot formation. Measurements are performed with both Jet-A and sustainable aviation fuel (SAF) at different operating pressures, preheat temperatures and global equivalence ratios. Phase Doppler particle anemometry is utilized to measure instantaneous drop-sizes in both non-reacting and reacting conditions. Instantaneous soot particle temperature and soot volume fraction distributions were measured in the primary zone of the combustor using two-color planar auto-compensating laser induced incandescence for both Jet-A and SAF flames. The drop-sizes shifted towards larger diameters for reacting conditions compared to non-reacting flow, possibly indicating the complete evaporation of smaller droplets at a given operating condition. In comparison to Jet-A, SAF fuel spray produced slightly smaller droplets owing to its reduced surface tension and higher vapor pressure values. The maximum averaged SVF were observed to be along the main reaction zone with values around 5 ppm for Jet-A flames at the operated conditions. For the SAF flames at the same conditions, the averaged SVF reduced by almost 2-3 times compared to Jet-A flames. AN - dot:89726 KW - Aviation KW - Flammability KW - Chemical sprays KW - Chemical dispersions KW - Doppler effect KW - Lasers KW - ASCENT KW - swirl-stabilized Jet-A/SAF flames KW - soot in high pressure Jet-A flames KW - spray atomization KW - phase Doppler anemometry KW - laser induced incandescence LA - English PB - Eastern States Section of the Combustion Institute PY - 2025-03-01 SN - 1C09-110490475 TI - Spray and Soot Characteristics of Liquid Spray Flames in a High-Pressure Sector Combustor M3 - Proceedings N1 - United States N1 - 13-C-AJFE-GIT-080 N1 - Open Access; https://creativecommons.org/licenses/by/4.0/ UR - https://rosap.ntl.bts.gov/view/dot/89726 ER -
Contrail Observation Limitations Using Geostationary Satellites

Euchenhofer, Marlene V. ;

Prashanth, Prakash

2025-11-01 | PDF

Contrails are a significant contributor to aviation's climate impact with an effective radiative forcing similar to that from aviation's CO2 emissions, yet large uncertainties remain. Many observational contrail studies rely on data from a single sensor, in recent years increasingly from a geostationary imager, accepting lower spatial resolution in ...

03/30/2026

Title : Contrail Observation Limitations Using Geostationary Satellites Creator(s) : Euchenhofer, Marlene V.;Prashanth, Prakash;Parke, Sydney A.;Eastham, Sebastian D.;Waitz, Ian A.; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;Massachusetts Institute of Technology; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy Published Date : 2025-11-01 Report Number : 2025GL118386 DOI : https://doi.org/10.1029/2025GL118386 Euchenhofer, Marlene V. et al. (2025). Contrail Observation Limitations Using Geostationary Satellites. https://doi.org/10.1029/2025GL118386 Euchenhofer, Marlene V. et al. "Contrail Observation Limitations Using Geostationary Satellites" (2025), https://doi.org/10.1029/2025GL118386 Euchenhofer, Marlene V. et al. "Contrail Observation Limitations Using Geostationary Satellites" , 2025, https://doi.org/10.1029/2025GL118386 Export RIS Citation Information. TY - Journal Article AU - Euchenhofer, Marlene V. AU - Prashanth, Prakash AU - Parke, Sydney A. AU - Eastham, Sebastian D. AU - Waitz, Ian A. A2 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A2 - Massachusetts Institute of Technology A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - Contrails are a significant contributor to aviation's climate impact with an effective radiative forcing similar to that from aviation's CO2 emissions, yet large uncertainties remain. Many observational contrail studies rely on data from a single sensor, in recent years increasingly from a geostationary imager, accepting lower spatial resolution in exchange for higher temporal and spatial coverage. However, the ability of geostationary imagery to resolve contrails has not been systematically characterized. By comparing higher spatial resolution low Earth orbit satellite imagery from Visual Infrared Imaging Radiometer Suite (VIIRS) to geostationary satellite imagery from GOES ABI, we show that the latter does not resolve 80% of the contrails nor half of the total length compared to contrails identified with VIIRS. Our findings underscore the need for multi‐sensor approaches to collect observational contrail data for improved validation of climate models and to enable more rigorous and verifiable contrail avoidance strategies. AB - This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) license https://creativecommons.org/licenses/by/4.0/. Please cite this article as: Euchenhofer, M. V., Prashanth, P., Parke, S. A., Eastham, S. D., & Waitz, I. A. (2025). Contrail observation limitations using geostationary satellites. Geophysical Research Letters, 52, e2025GL118386. https://doi.org/10.1029/2025GL118386 AN - dot:89725 DO - https://doi.org/10.1029/2025GL118386 KW - Aircraft KW - Aircraft exhaust gases KW - Navigational satellites KW - Climate KW - ASCENT KW - geostationary satellites LA - English PB - Wiley Periodicals LLC PY - 2025-11-01 SN - 2025GL118386 TI - Contrail Observation Limitations Using Geostationary Satellites M3 - Journal Article N1 - United States N1 - 13-C-AJFE-MIT-086 N1 - Open Access; https://creativecommons.org/licenses/by/4.0/ UR - https://rosap.ntl.bts.gov/view/dot/89725 ER -
Security Defense of Transportation Networks Against Cyberattacks: A Physics-Informed AI Approach

Kim, Yongju

;

Chen, Sikai

2026-03-01 | PDF

Connected and automated vehicles (CAVs) rely on digitally acquired traffic state information for real-time maneuver decisions, making them vulnerable to cyberattacks that manipulate perceived traffic states or communication channels. Such manipulation can subtly alter vehicle behavior and, in interactive traffic environments, may propagate disturba ...

03/30/2026

Title : Security Defense of Transportation Networks Against Cyberattacks: A Physics-Informed AI Approach Creator(s) : Kim, Yongju;Chen, Sikai;Ahn, Soyoung (Sue);Chitturi, Madhav;Noyce, David A.; Corporate Creator(s) : Center for Connected and Automated Transportation (CCAT);University of Wisconsin--Madison; Corporate Contributor(s) : United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2026-03-01 Report Number : GR000034957 URL : https://rosap.ntl.bts.gov/view/dot/89724 Kim, Yongju et al. (2026). Security Defense of Transportation Networks Against Cyberattacks: A Physics-Informed AI Approach. Kim, Yongju et al. "Security Defense of Transportation Networks Against Cyberattacks: A Physics-Informed AI Approach" (2026) Kim, Yongju et al. "Security Defense of Transportation Networks Against Cyberattacks: A Physics-Informed AI Approach" , 2026 Export RIS Citation Information. TY - Tech Report AU - Kim, Yongju AU - Chen, Sikai AU - Ahn, Soyoung (Sue) AU - Chitturi, Madhav AU - Noyce, David A. A2 - Center for Connected and Automated Transportation (CCAT) A2 - University of Wisconsin--Madison A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - Connected and automated vehicles (CAVs) rely on digitally acquired traffic state information for real-time maneuver decisions, making them vulnerable to cyberattacks that manipulate perceived traffic states or communication channels. Such manipulation can subtly alter vehicle behavior and, in interactive traffic environments, may propagate disturbances beyond the attacked vehicle. The objective of this study is to develop frameworks for (i) detecting abnormal lane-changing under cyberattacks and (ii) enabling robust decision-making under adversarial conditions. For detection, a physics-guided neural network integrating a game-theoretic lane-changing model with LSTM learning is developed and evaluated using the I-24 MOTION dataset under simulated false data injection and denial-of-service attacks. Results show improved prediction accuracy and effective detection of falsified lane-changing behaviors. For robust control, a hierarchical adversarial reinforcement learning framework is proposed for discretionary lane-changing under bounded perturbations. Simulation results indicate improved traffic efficiency while maintaining safety under worst-case perturbations. These findings provide a modeling foundation for cybersecurity-aware monitoring and robust tactical decision-making in CAV systems. AN - dot:89724 ET - Final report (April 2024 – March 2026) KW - Connected vehicles KW - Intelligent transportation systems KW - Computer security KW - Lane changing KW - Detectors KW - Neural networks KW - Decision making KW - Simulation KW - Evaluation KW - Data access control KW - Communication devices KW - Anomaly detection KW - Physics-guided neural network KW - Adversarial reinforcement learning LA - English PB - University of Michigan. Center for Connected and Automated Transportation PY - 2026-03-01 SN - GR000034957 TI - Security Defense of Transportation Networks Against Cyberattacks: A Physics-Informed AI Approach M3 - Tech Report N1 - United States N1 - 69A3552348305 UR - https://rosap.ntl.bts.gov/view/dot/89724 ER -
Benchmarking Computer Vision-Based Approaches To Derive Engineering-Oriented Condition From Existing UDOT Assets Data

Pandey, Shailaja Ratna ;

Esteghamati, Mohsen Zaker

2025-02-01 | PDF

Condition assessment of how transportation infrastructure supports safe and reliable road and highway operation. Departments of Transportation across the country rely heavily on manual inspections, which are time-consuming and costly. This study evaluated whether modern computer vision (CV) methods can support traffic sign condition assessment alon ...

03/30/2026

Title : Benchmarking Computer Vision-Based Approaches To Derive Engineering-Oriented Condition From Existing UDOT Assets Data Creator(s) : Pandey, Shailaja Ratna;Esteghamati, Mohsen Zaker; Corporate Creator(s) : Utah State University. Department of Civil and Environmental Engineering Corporate Contributor(s) : Utah. Department of Transportation. Research and Innovation Division;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-02-01 Report Number : UT- 26.03 URL : https://rosap.ntl.bts.gov/view/dot/89723 Pandey, Shailaja Ratna and Esteghamati, Mohsen Zaker (2025). Benchmarking Computer Vision-Based Approaches To Derive Engineering-Oriented Condition From Existing UDOT Assets Data. Pandey, Shailaja Ratna and Esteghamati, Mohsen Zaker "Benchmarking Computer Vision-Based Approaches To Derive Engineering-Oriented Condition From Existing UDOT Assets Data" (2025) Pandey, Shailaja Ratna and Esteghamati, Mohsen Zaker "Benchmarking Computer Vision-Based Approaches To Derive Engineering-Oriented Condition From Existing UDOT Assets Data" , 2025 Export RIS Citation Information. TY - Tech Report AU - Pandey, Shailaja Ratna AU - Esteghamati, Mohsen Zaker A2 - Utah State University. Department of Civil and Environmental Engineering A3 - Utah. Department of Transportation. Research and Innovation Division A3 - United States. Department of Transportation. Federal Highway Administration AB - Condition assessment of how transportation infrastructure supports safe and reliable road and highway operation. Departments of Transportation across the country rely heavily on manual inspections, which are time-consuming and costly. This study evaluated whether modern computer vision (CV) methods can support traffic sign condition assessment along Utah highways. High-resolution roadway images collected using a camera-mounted vehicle were curated and annotated for three sign types (regulatory, warning, and guide) and four defect conditions (fading, delamination, missing letters/symbols, and broken signs) based on the Manual on Uniform Traffic Control Devices (MUTCD) standards. This study compared two different CV algorithms of YOLO11 and RT-DETR for traffic-sign detection and defect classification. Overall, the CV models showed promising performance for defect cases where an adequate number of training data existed. For example, for fading, YOLO11 and RT-DETR achieved 75% F1 on the validation. Binary classification of delamination (i.e., delamination versus no delamination) yielded similar performance for both models (68% F1). In contrast, the models showed poor performance to identify missing letters/symbols due to texture overlap with delamination and a limited number of annotated sign images with such defects. The results suggested that data quality and label definition had a greater impact on model performance than the choice of algorithms for the studied models. AN - dot:89723 ET - Final Report: July 2024 to Dec 2025 KW - Traffic signs KW - Assessments KW - Computer vision KW - Object detection KW - Optical devices KW - Transformers KW - Evaluation KW - Cameras KW - Data analysis KW - Algorithms KW - Delamination KW - Benchmarks KW - Performance KW - Assets KW - Traffic sign condition assessment KW - Computer vision KW - Object detection KW - YOLO11 KW - Vision transformers KW - MUTCD LA - English PB - Utah Department of Transportation PY - 2025-02-01 SN - UT- 26.03 TI - Benchmarking Computer Vision-Based Approaches To Derive Engineering-Oriented Condition From Existing UDOT Assets Data M3 - Tech Report N1 - United States N1 - 25-8073 UR - https://rosap.ntl.bts.gov/view/dot/89723 ER -
What Holds High-Speed Rail Back: Lessons From Global Systems and California’s Experience [Research Brief]

Sharma, Deepak K. ;

Lekhi, Rajnish

2026-03-01 | PDF

California High-Speed Rail (CHSR) has been under development for more than a decade, yet progress has been slowed by delays, cost escalation, and unstable funding. This research examined the main barriers to timely and cost-effective delivery of CHSR and identified lessons that can guide future high-speed rail (HSR) projects in California. The stud ...

03/30/2026

Title : What Holds High-Speed Rail Back: Lessons From Global Systems and California’s Experience [Research Brief] Creator(s) : Sharma, Deepak K.;Lekhi, Rajnish;Parr, Scott A.; Corporate Creator(s) : San Jose State University. College of Business. Mineta Transportation Institute;California State University, Fullerton; Corporate Contributor(s) : State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration;United States. Department of Transportation. University Transportation Centers (UTC) Program;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2026-03-01 Report Number : 2470 URL : https://rosap.ntl.bts.gov/view/dot/89722 Sharma, Deepak K. et al. (2026). What Holds High-Speed Rail Back: Lessons From Global Systems and California’s Experience [Research Brief]. Sharma, Deepak K. and Lekhi, Rajnish and Parr, Scott A. "What Holds High-Speed Rail Back: Lessons From Global Systems and California’s Experience [Research Brief]" (2026) Sharma, Deepak K. et al. "What Holds High-Speed Rail Back: Lessons From Global Systems and California’s Experience [Research Brief]" , 2026 Export RIS Citation Information. TY - Brief AU - Sharma, Deepak K. AU - Lekhi, Rajnish AU - Parr, Scott A. A2 - San Jose State University. College of Business. Mineta Transportation Institute A2 - California State University, Fullerton A3 - State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - California High-Speed Rail (CHSR) has been under development for more than a decade, yet progress has been slowed by delays, cost escalation, and unstable funding. This research examined the main barriers to timely and cost-effective delivery of CHSR and identified lessons that can guide future high-speed rail (HSR) projects in California. The study asked: Why has CHSR struggled to advance as planned, and what changes are needed to improve outcomes? To answer this, we compared CHSR with international HSR projects, studied Japan’s land readjustment approach, reviewed U.S. rail integration practices, analyzed California’s transportation legislation, and examined oversight reports and expert interviews. The results show that CHSR’s biggest barriers are structural, not technical. Stable funding, stronger governance, and legal reforms are needed to keep projects on schedule and advance mobility in the Golden State. AN - dot:89722 ET - Research Brief KW - High speed rail KW - Passenger trains KW - Railroad transportation KW - Lessons learned KW - Property acquisition KW - Interviewing KW - Land KW - Financing KW - Bridges KW - Highways KW - Costs KW - Legislation LA - English PB - San Jose State University. College of Business. Mineta Transportation Institute PY - 2026-03-01 SN - 2470 TI - What Holds High-Speed Rail Back: Lessons From Global Systems and California’s Experience [Research Brief] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89722 ER -
Highway Construction Workforce Partnership: Strategic Workforce Development: Training Tomorrow's Highway Construction Leaders

United States. Department of Transportation. Federal Highway Administration

2021-08-11 | PDF

Building a strong, capable highway construction workforce that supports the nation's transportation industry and drives the economy forward requires a solid foundation. The U.S. Department of Transportation’s Federal Highway Administration (FHWA) established the Highway Construction Workforce Partnership (HCWP) to help train qualified individuals a ...

03/30/2026

Title : Highway Construction Workforce Partnership: Strategic Workforce Development: Training Tomorrow's Highway Construction Leaders Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Chong, Michael;Foster, Corey;Albright, James;Chavez, Robert;Bird, Patty;Gottschalk, Bob; Published Date : 2021-08-11 URL : https://rosap.ntl.bts.gov/view/dot/89721 United States. Department of Transportation. Federal Highway Administration (2021). Highway Construction Workforce Partnership: Strategic Workforce Development: Training Tomorrow's Highway Construction Leaders. United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Training Tomorrow's Highway Construction Leaders" (2021) United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Training Tomorrow's Highway Construction Leaders" , 2021 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Chong, Michael A4 - Foster, Corey A4 - Albright, James A4 - Chavez, Robert A4 - Bird, Patty A4 - Gottschalk, Bob AB - Building a strong, capable highway construction workforce that supports the nation's transportation industry and drives the economy forward requires a solid foundation. The U.S. Department of Transportation’s Federal Highway Administration (FHWA) established the Highway Construction Workforce Partnership (HCWP) to help train qualified individuals and place them into needed roles. HCWPs in Arizona, Los Angeles, Pittsburgh, and Rhode Island are teaming up with organizations like the National Center for Construction Education & Research (NCCER) and the Pittsburgh Job Corps Center to prepare tomorrow’s workforce to excel in highway construction apprenticeship programs that launch lasting careers. AN - dot:89721 KW - Education and training KW - Training KW - Road construction KW - Road construction industry KW - Transportation careers LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2021-08-11 TI - Highway Construction Workforce Partnership: Strategic Workforce Development: Training Tomorrow's Highway Construction Leaders M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89721 ER -
Microphysical Modeling & Analysis of ACCESS 2 Aviation Exhaust Observations

Jacobson, Mark Z. ;

Lele, Sanjiva K.

2016-12-15 | PDF

As the popularity of and global access to air travel expands, quantifying its impact on climate and air pollution becomes increasingly important. However, the spatial-temporal distribution of aircraft emissions and their byproducts span many orders of magnitude, as contrail development begins within seconds, but can spread to the kilometer-scale an ...

03/30/2026

Title : Microphysical Modeling & Analysis of ACCESS 2 Aviation Exhaust Observations Creator(s) : Jacobson, Mark Z.;Lele, Sanjiva K.; Corporate Creator(s) : Stanford University Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy; Published Date : 2016-12-15 URL : https://rosap.ntl.bts.gov/view/dot/89720 Jacobson, Mark Z. and Lele, Sanjiva K. (2016). Microphysical Modeling & Analysis of ACCESS 2 Aviation Exhaust Observations. Jacobson, Mark Z. and Lele, Sanjiva K. "Microphysical Modeling & Analysis of ACCESS 2 Aviation Exhaust Observations" (2016) Jacobson, Mark Z. and Lele, Sanjiva K. "Microphysical Modeling & Analysis of ACCESS 2 Aviation Exhaust Observations" , 2016 Export RIS Citation Information. TY - Tech Report AU - Jacobson, Mark Z. AU - Lele, Sanjiva K. A2 - Stanford University A3 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - As the popularity of and global access to air travel expands, quantifying its impact on climate and air pollution becomes increasingly important. However, the spatial-temporal distribution of aircraft emissions and their byproducts span many orders of magnitude, as contrail development begins within seconds, but can spread to the kilometer-scale and persist for hours. The wide range of spatial and temporal scales makes it difficult to obtain detailed knowledge of the composition and evolution of emissions from measurements or modeling studies alone. In an attempt to increase understanding, this project simulates the short-term, near- and far-field evolution of aircraft exhaust aerosol and contrail particles and gases with two computer models: GATOR-GCMOM and an LES model. Together, these two models simulate phenomena spanning a spatial range from millimeters to thousands of kilometers. Detailed microphysical processes in the models are validated and improved with field measurements from NASA’s ACCESS-2 campaign, so that the models may provide more credible estimates of impacts on climate and atmospheric composition when used at the regional and global scale. AN - dot:89720 ET - Final Report KW - Pollutants KW - Aircraft exhaust gases KW - Environmental impacts KW - Environmental impact analysis KW - ASCENT LA - English PB - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment PY - 2016-12-15 TI - Microphysical Modeling & Analysis of ACCESS 2 Aviation Exhaust Observations M3 - Tech Report N1 - United States N1 - 13-C-AJFE-SU-002 UR - https://rosap.ntl.bts.gov/view/dot/89720 ER -
Evaluation of Wind-Loading on Airport Signs

Bagot, Keith

2000-06-01 | PDF

Airport signs at certain critical locations at O’Hare International Airport and other major U.S. airports are being sheared off their mounting legs at the frangible coupling from aircraft jet engine blast and/or wake turbulence forces. his damage to the sign increases the chance of foreign object damage (FOD) as well as the loss of visual guidance ...

03/30/2026

Title : Evaluation of Wind-Loading on Airport Signs Creator(s) : Bagot, Keith Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research Published Date : 2000-06-01 Report Number : DOT/FAA/AR-TN00/32 URL : https://rosap.ntl.bts.gov/view/dot/89719 Bagot, Keith (2000). Evaluation of Wind-Loading on Airport Signs. Bagot, Keith "Evaluation of Wind-Loading on Airport Signs" (2000) Bagot, Keith "Evaluation of Wind-Loading on Airport Signs" , 2000 Export RIS Citation Information. TY - Tech Report AU - Bagot, Keith A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research AB - Airport signs at certain critical locations at O’Hare International Airport and other major U.S. airports are being sheared off their mounting legs at the frangible coupling from aircraft jet engine blast and/or wake turbulence forces. his damage to the sign increases the chance of foreign object damage (FOD) as well as the loss of visual guidance for other aircraft. here is a need to better understand and more precisely determine the forces on the signs at these locations. The results of this testing indicated that the current frangibility design criteria is not adequate for airport signs installed on airports that service large transport aircraft. modification to the frangibility requirements or a maximum setback distance would appear to be a satisfactory solution to mitigate sign breakage. he former is recommended since it would appear to have no impact on the operational characteristics of the aircraft movement area. AN - dot:89719 ET - Technical Note KW - Airport surface traffic control KW - Design KW - Jet engines KW - Sign supports KW - Signs KW - Visual aids LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2000-06-01 SN - DOT/FAA/AR-TN00/32 TI - Evaluation of Wind-Loading on Airport Signs M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89719 ER -
Strategic Workforce Development: Case Study: Focus on Innovation: Advanced Digital Construction Management Systems

United States. Department of Transportation. Federal Highway Administration

2025-09-10 | PDF

Advanced Digital Construction Management Systems (ADCMS) are an important part of the Federal Highway Administration’s (FHWA) ongoing, strategic effort to share innovative project delivery practices with State and other transportation agencies. ADCMS are technologies and processes that include systems for infrastructure planning and coordination, d ...

03/30/2026

Title : Strategic Workforce Development: Case Study: Focus on Innovation: Advanced Digital Construction Management Systems Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Currier, Chrisy Published Date : 2025-09-10 URL : https://rosap.ntl.bts.gov/view/dot/89718 United States. Department of Transportation. Federal Highway Administration (2025). Strategic Workforce Development: Case Study: Focus on Innovation: Advanced Digital Construction Management Systems. United States. Department of Transportation. Federal Highway Administration "Strategic Workforce Development: Case Study: Focus on Innovation: Advanced Digital Construction Management Systems" (2025) United States. Department of Transportation. Federal Highway Administration "Strategic Workforce Development: Case Study: Focus on Innovation: Advanced Digital Construction Management Systems" , 2025 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Currier, Chrisy AB - Advanced Digital Construction Management Systems (ADCMS) are an important part of the Federal Highway Administration’s (FHWA) ongoing, strategic effort to share innovative project delivery practices with State and other transportation agencies. ADCMS are technologies and processes that include systems for infrastructure planning and coordination, design, construction, maintenance, modernization and management, and asset management. Through its ADCMS Program, FHWA offers grants to help State departments of transportation (DOT) adopt advanced technology that can be used throughout various parts of the construction lifecycle. AN - dot:89718 KW - Infrastructure KW - Construction management KW - Project delivery KW - Transportation planning LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2025-09-10 TI - Strategic Workforce Development: Case Study: Focus on Innovation: Advanced Digital Construction Management Systems M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89718 ER -
Highway Construction Workforce Partnership: Strategic Workforce Development: Regional Working Groups Collaborate to Combat Shortages in Highway Construction Workforce

United States. Department of Transportation. Federal Highway Administration

2021-06-30 | PDF

Across the nation, there is a shortage of highway construction workers, who keep the transportation industry and economy moving forward. The U.S. Department of Transportation's Federal Highway Administration (FHWA) partnered with other key national highway organizations and the Employment and Training Administration to establish the Highway Constru ...

03/30/2026

Title : Highway Construction Workforce Partnership: Strategic Workforce Development: Regional Working Groups Collaborate to Combat Shortages in Highway Construction Workforce Corporate Creator(s) : United States. Department of Transportation. Federal Highway Administration Contributor(s) : Pavlik, Monica;Chong, Michael;James, Stephanie;Caliendo, Michael; Published Date : 2021-06-30 URL : https://rosap.ntl.bts.gov/view/dot/89717 United States. Department of Transportation. Federal Highway Administration (2021). Highway Construction Workforce Partnership: Strategic Workforce Development: Regional Working Groups Collaborate to Combat Shortages in Highway Construction Workforce. United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Regional Working Groups Collaborate to Combat Shortages in Highway Construction Workforce" (2021) United States. Department of Transportation. Federal Highway Administration "Highway Construction Workforce Partnership: Strategic Workforce Development: Regional Working Groups Collaborate to Combat Shortages in Highway Construction Workforce" , 2021 Export RIS Citation Information. TY - Brief A2 - United States. Department of Transportation. Federal Highway Administration A4 - Pavlik, Monica A4 - Chong, Michael A4 - James, Stephanie A4 - Caliendo, Michael AB - Across the nation, there is a shortage of highway construction workers, who keep the transportation industry and economy moving forward. The U.S. Department of Transportation's Federal Highway Administration (FHWA) partnered with other key national highway organizations and the Employment and Training Administration to establish the Highway Construction Workforce Partnership (HCWP). The partnership brings highway construction, education, and workforce interests together at state and local levels to identify, train, and place individuals into trade occupations to fill industry workforce gaps. The programs are managed by the partner working groups that identify workforce needs and resources. HCWPs in Alabama, Denver, Idaho, and Rhode Island have launched successful working groups. AN - dot:89717 KW - Education and training KW - Training KW - Road construction KW - Road construction industry KW - Transportation careers LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2021-06-30 TI - Highway Construction Workforce Partnership: Strategic Workforce Development: Regional Working Groups Collaborate to Combat Shortages in Highway Construction Workforce M3 - Brief N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/89717 ER -
Evaluating the Performance of Novel TPMS-Based Acoustic Liner Designs Suitable for Additive Manufacturing

Packer, Alden ;

Reimann, C. Aaron

2025-08-01 | PDF

Acoustic liners are integral to the noise management of aircraft engines. As such, acoustic liner designs and configurations are the subject of research and development to address the acoustic requirements of novel engine layouts. Perforate sheet over honeycomb core, or single degree of freedom (SDOF), liners are the traditional system that has bee ...

03/30/2026

Title : Evaluating the Performance of Novel TPMS-Based Acoustic Liner Designs Suitable for Additive Manufacturing Creator(s) : Packer, Alden;Reimann, C. Aaron;Winkler, Julian;Homma, Kenji;Mendoza, Jeffrey;Greenwood, Eric;Manahan, Michael;Meisel, Nicholas; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;Pennsylvania State University; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy Published Date : 2025-08-01 Report Number : Packer_SFF_2025 URL : https://rosap.ntl.bts.gov/view/dot/89716 Packer, Alden et al. (2025). Evaluating the Performance of Novel TPMS-Based Acoustic Liner Designs Suitable for Additive Manufacturing. Packer, Alden et al. "Evaluating the Performance of Novel TPMS-Based Acoustic Liner Designs Suitable for Additive Manufacturing" (2025) Packer, Alden et al. "Evaluating the Performance of Novel TPMS-Based Acoustic Liner Designs Suitable for Additive Manufacturing" , 2025 Export RIS Citation Information. TY - Proceedings AU - Packer, Alden AU - Reimann, C. Aaron AU - Winkler, Julian AU - Homma, Kenji AU - Mendoza, Jeffrey AU - Greenwood, Eric AU - Manahan, Michael AU - Meisel, Nicholas A2 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A2 - Pennsylvania State University A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - Acoustic liners are integral to the noise management of aircraft engines. As such, acoustic liner designs and configurations are the subject of research and development to address the acoustic requirements of novel engine layouts. Perforate sheet over honeycomb core, or single degree of freedom (SDOF), liners are the traditional system that has been used in the past, while more advanced double degree of freedom (DDOF) liners are the state-of-the-art liners currently implemented in aircraft engines. Leveraging the design freedom of additive manufacturing, our current research explores the use of TPMS lattice structures as an advanced core structure for acoustic liners. In this study, previously developed design exploration methods have been implemented to compare the performance of novel TPMS acoustic liners with the SDOF and DDOF liners. Performance comparisons between the acoustic liner types demonstrate the viability of the TPMS lattice liner as a viable alternative to standard designs, meriting further refinement and exploration. AN - dot:89716 KW - Acoustics KW - Three dimensional printing KW - Noise control KW - Aviation KW - Manufacturing KW - ASCENT KW - Additive manufacturing LA - English PB - The Minerals, Metals & Materials Society (TMS) PY - 2025-08-01 SN - Packer_SFF_2025 TI - Evaluating the Performance of Novel TPMS-Based Acoustic Liner Designs Suitable for Additive Manufacturing M3 - Proceedings N1 - United States N1 - 13-C-AJFE-PSU-113 N1 - Open Access; https://creativecommons.org/licenses/by/4.0/ UR - https://rosap.ntl.bts.gov/view/dot/89716 ER -
Evaluation and Development of Cost Prediction Models for Resurfacing Projects To Improve M&R Analysis and Project Development

Shrestha, K. Joseph ;

Uddin, Mohammad Moin

2025-08-01 | PDF

Accurate preliminary cost estimates for resurfacing projects are essential to conduct a reliable Maintenance & Rehabilitation (M&R) analysis, prioritize projects, and optimize the use of available budget. However, TDOT is currently using an outdated cost per lane mile data for such analysis, and hence the results of such analysis can be less reliab ...

03/30/2026

Title : Evaluation and Development of Cost Prediction Models for Resurfacing Projects To Improve M&R Analysis and Project Development Creator(s) : Shrestha, K. Joseph;Uddin, Mohammad Moin;Iyiola, David;Paul, Pritom; Corporate Creator(s) : East Tennessee State University Corporate Contributor(s) : Tennessee. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-08-01 Report Number : RES2024-08 URL : https://rosap.ntl.bts.gov/view/dot/89715 Shrestha, K. Joseph et al. (2025). Evaluation and Development of Cost Prediction Models for Resurfacing Projects To Improve M&R Analysis and Project Development. Shrestha, K. Joseph et al. "Evaluation and Development of Cost Prediction Models for Resurfacing Projects To Improve M&R Analysis and Project Development" (2025) Shrestha, K. Joseph et al. "Evaluation and Development of Cost Prediction Models for Resurfacing Projects To Improve M&R Analysis and Project Development" , 2025 Export RIS Citation Information. TY - Tech Report AU - Shrestha, K. Joseph AU - Uddin, Mohammad Moin AU - Iyiola, David AU - Paul, Pritom A2 - East Tennessee State University A3 - Tennessee. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Accurate preliminary cost estimates for resurfacing projects are essential to conduct a reliable Maintenance & Rehabilitation (M&R) analysis, prioritize projects, and optimize the use of available budget. However, TDOT is currently using an outdated cost per lane mile data for such analysis, and hence the results of such analysis can be less reliable. To address the issue, this study develops a framework and a tangible tool entitled “Resurfacing Cost Prediction (RCP).” This framework and tool require limited project characteristics, such as, project length and location, that are available at the early phase of project development. The validation of the tool achieved 100% compliance for accuracy based on AASHTO Practical Guide for Cost Estimation for three treatment types for planning phase. The study also addresses another issue related to project bundling. TDOT creates bundles of resurfacing projects to attract more contractors, achieve lower cost per lane mile, and reduce administrative burden. However, TDOT lacks a systematic methodology to create project bundles. As such, it relies on manual identification of projects suitable for bundling. This manual approach can be very time-consuming and cumbersome, and it can create inconsistent bundles. To address this issue, an Automated Maintenance Project Bundling (AMPB) tool is developed. The tool was able to achieve up to 92% accuracy in correctly identifying if a project should be bundled or not. These frameworks and tools are expected to aid TDOT in improving the planning and execution of resurfacing projects while optimizing the use of available budget. AN - dot:89715 ET - Final Report: August 2023 - September 2025 KW - Cost estimating KW - Construction projects KW - Evaluation KW - Project management KW - Maintenance KW - Rehabilitation KW - Planning KW - Methodology KW - Cost-estimating-models KW - construction-project-bundling KW - cost-prediction KW - compatibility-scores LA - English PB - Tennessee. Department of Transportation PY - 2025-08-01 SN - RES2024-08 TI - Evaluation and Development of Cost Prediction Models for Resurfacing Projects To Improve M&R Analysis and Project Development M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89715 ER -
Project 045 Takeoff/Climb Analysis to Support AEDT Aircraft Performance Model (APM) Development

Mavris, Dimitri N.

;

Kirby, Michelle R.

2020-03-01 | PDF

Accurate modeling of aircraft performance is a key factor in estimating aircraft noise, emissions, and fuel burn. Within the Aviation Environmental Design Tool (AEDT), many assumptions are made for aircraft performance modeling with respect to aircraft weight and departure procedure, coupled with aircraft departure typically being modeled by assumi ...

03/30/2026

Title : Project 045 Takeoff/Climb Analysis to Support AEDT Aircraft Performance Model (APM) Development Creator(s) : Mavris, Dimitri N.;Kirby, Michelle R.;Li, Yongchang;Puranik, Tejas;Lim, Don;Gao, Zhenyu;Jin, Yee Chan;Monteiro, Dylan;Gabrielian, Ana;Isakson, Loren; Corporate Creator(s) : Georgia Institute of Technology. School of Aerospace Engineering Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy; Published Date : 2020-03-01 URL : https://rosap.ntl.bts.gov/view/dot/89714 Mavris, Dimitri N. et al. (2020). Project 045 Takeoff/Climb Analysis to Support AEDT Aircraft Performance Model (APM) Development. Mavris, Dimitri N. et al. "Project 045 Takeoff/Climb Analysis to Support AEDT Aircraft Performance Model (APM) Development" (2020) Mavris, Dimitri N. et al. "Project 045 Takeoff/Climb Analysis to Support AEDT Aircraft Performance Model (APM) Development" , 2020 Export RIS Citation Information. TY - Tech Report AU - Mavris, Dimitri N. AU - Kirby, Michelle R. AU - Li, Yongchang AU - Puranik, Tejas AU - Lim, Don AU - Gao, Zhenyu AU - Jin, Yee Chan AU - Monteiro, Dylan AU - Gabrielian, Ana AU - Isakson, Loren A2 - Georgia Institute of Technology. School of Aerospace Engineering A3 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - Accurate modeling of aircraft performance is a key factor in estimating aircraft noise, emissions, and fuel burn. Within the Aviation Environmental Design Tool (AEDT), many assumptions are made for aircraft performance modeling with respect to aircraft weight and departure procedure, coupled with aircraft departure typically being modeled by assuming that full rated takeoff power/thrust is used. As operations around airports continue to evolve, there is a need to examine those assumptions and to improve the modeling accuracy with flight data. In recent years, flight data are increasingly being used to enhance models and bring model estimation even closer to reality. Research is needed to build on prior work with a view to develop a robust set of recommendations for improved estimation processes for takeoff weight, reduced thrust takeoffs, and departure profiles within AEDT. During this project, the research provided the FAA with recommendations and an implementation plan to improve the takeoff performance modeling based on real world observations, which ultimately was included in the public release of AEDT3b. AN - dot:89714 KW - Aircraft noise KW - Aircraft operations KW - Fuel consumption KW - Pollutants KW - Software KW - Uncertainty KW - Validation KW - ASCENT LA - English PB - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment PY - 2020-03-01 TI - Project 045 Takeoff/Climb Analysis to Support AEDT Aircraft Performance Model (APM) Development M3 - Tech Report N1 - United States N1 - 13-C-AJFE-GIT-020 UR - https://rosap.ntl.bts.gov/view/dot/89714 ER -
Equity Evaluation of Residents’ Transit + Walk Accessibility to Sacramento Healthcare Facilities

Abadi, Masoud Ghodrat ;

Zandiatashbar, Ahoura

2026-03-01 | PDF

Access to healthcare is a key component of public health equity, yet many U.S. communities remain dependent on private vehicles for medical travel. This study introduces an integrated framework, the Transit+Walk Score (TWS), to evaluate how effectively residents of Sacramento, California, can reach healthcare facilities via public transit and how s ...

03/30/2026

Title : Equity Evaluation of Residents’ Transit + Walk Accessibility to Sacramento Healthcare Facilities Creator(s) : Abadi, Masoud Ghodrat;Zandiatashbar, Ahoura;Pickett, Aaron;Nemett, Stephanie;Sharifi, Soheil; Corporate Creator(s) : San Jose State University. College of Business. Mineta Transportation Institute Corporate Contributor(s) : State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology; Published Date : 2026-03-01 Report Number : 26-05 DOI : https://doi.org/10.31979/mti.2026.2509 Abadi, Masoud Ghodrat et al. (2026). Equity Evaluation of Residents’ Transit + Walk Accessibility to Sacramento Healthcare Facilities. https://doi.org/10.31979/mti.2026.2509 Abadi, Masoud Ghodrat et al. "Equity Evaluation of Residents’ Transit + Walk Accessibility to Sacramento Healthcare Facilities" (2026), https://doi.org/10.31979/mti.2026.2509 Abadi, Masoud Ghodrat et al. "Equity Evaluation of Residents’ Transit + Walk Accessibility to Sacramento Healthcare Facilities" , 2026, https://doi.org/10.31979/mti.2026.2509 Export RIS Citation Information. TY - Tech Report AU - Abadi, Masoud Ghodrat AU - Zandiatashbar, Ahoura AU - Pickett, Aaron AU - Nemett, Stephanie AU - Sharifi, Soheil A2 - San Jose State University. College of Business. Mineta Transportation Institute A3 - State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology AB - Access to healthcare is a key component of public health equity, yet many U.S. communities remain dependent on private vehicles for medical travel. This study introduces an integrated framework, the Transit+Walk Score (TWS), to evaluate how effectively residents of Sacramento, California, can reach healthcare facilities via public transit and how safely, comfortably, and conveniently they can walk from transit stops to those facilities. The research aims to inform planners, transit agencies, and policymakers in designing equitable and multimodal transportation systems. The research team combined geospatial network modeling and field-based walkability audits to assess 123 healthcare facilities across Sacramento, with 56 sites selected for detailed evaluation using the Pedestrian Environment Data Scan (PEDS) tool. The TWS integrated modeled transit travel times with on-the-ground walkability data to identify areas of high and low accessibility. Findings revealed that Downtown, Midtown, and East Sacramento exhibited the highest multimodal accessibility, while northern Arden-Arcade and outer suburban areas demonstrated the lowest. Educational attainment emerged as the strongest predictor of accessibility, highlighting structural inequities in pedestrian and transit infrastructure. The study concludes that equitable healthcare access requires both reliable transit and safe, continuous pedestrian networks. The TWS offers a scalable, data-driven tool to guide future investments that advance health equity, sustainable transportation, and inclusive community design. AN - dot:89713 DO - https://doi.org/10.31979/mti.2026.2509 KW - Public transit KW - Walkability KW - Health care facilities KW - Access KW - Transportation equity KW - Residents KW - Pedestrians KW - Multimodal transportation KW - Transit operating agencies KW - Pedestrian safety KW - Data analysis KW - Planning KW - Geospatial data KW - Evaluation LA - English PB - San Jose State University. College of Business. Mineta Transportation Institute PY - 2026-03-01 SN - 26-05 TI - Equity Evaluation of Residents’ Transit + Walk Accessibility to Sacramento Healthcare Facilities M3 - Tech Report N1 - United States N1 - SB1-SJAUX_2023-26 UR - https://rosap.ntl.bts.gov/view/dot/89713 ER -
Equity Evaluation of Residents’ Transit+Walk Accessibility to Sacramento Healthcare Facilities [Research Brief]

Abadi, Masoud Ghodrat ;

Zandiatashbar, Ahoura

2026-03-01 | PDF

A visit to almost any healthcare facility in the U.S. reveals a familiar sight: vast parking lots built for cars. This reflects a deeper reality that almost 9 out of 10 healthcare trips in the U.S. rely on private automobiles. Yet this car-dependent model creates serious challenges for people who cannot drive, including many older adults, people wi ...

03/30/2026

Title : Equity Evaluation of Residents’ Transit+Walk Accessibility to Sacramento Healthcare Facilities [Research Brief] Creator(s) : Abadi, Masoud Ghodrat;Zandiatashbar, Ahoura;Pickett, Aaron;Nemett, Stephanie;Sharifi, Soheil; Corporate Creator(s) : San Jose State University. College of Business. Mineta Transportation Institute;California State University Sacramento; Corporate Contributor(s) : State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration;United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology;United States. Department of Transportation. University Transportation Centers (UTC) Program; Published Date : 2026-03-01 Report Number : 2509 URL : https://rosap.ntl.bts.gov/view/dot/89712 Abadi, Masoud Ghodrat et al. (2026). Equity Evaluation of Residents’ Transit+Walk Accessibility to Sacramento Healthcare Facilities [Research Brief]. Abadi, Masoud Ghodrat et al. "Equity Evaluation of Residents’ Transit+Walk Accessibility to Sacramento Healthcare Facilities [Research Brief]" (2026) Abadi, Masoud Ghodrat et al. "Equity Evaluation of Residents’ Transit+Walk Accessibility to Sacramento Healthcare Facilities [Research Brief]" , 2026 Export RIS Citation Information. TY - Brief AU - Abadi, Masoud Ghodrat AU - Zandiatashbar, Ahoura AU - Pickett, Aaron AU - Nemett, Stephanie AU - Sharifi, Soheil A2 - San Jose State University. College of Business. Mineta Transportation Institute A2 - California State University Sacramento A3 - State of California SB1 2017/2018, Trustees of the California State University Sponsored Programs Administration A3 - United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology A3 - United States. Department of Transportation. University Transportation Centers (UTC) Program AB - A visit to almost any healthcare facility in the U.S. reveals a familiar sight: vast parking lots built for cars. This reflects a deeper reality that almost 9 out of 10 healthcare trips in the U.S. rely on private automobiles. Yet this car-dependent model creates serious challenges for people who cannot drive, including many older adults, people with disabilities, and low-income households. For millions of Americans, transportation barriers delay or prevent access to essential medical care. This project asks a simple but powerful question: without a car, how accessible are healthcare facilities? Focusing on Sacramento, California, the study examines whether public transit and walking infrastructure together provide equitable access to healthcare, particularly for transit dependent and underserved communities. To answer this question, the research introduces a new multimodal metric, the Transit+ Walk Score (TWS), which combines transit accessibility and pedestrian walkability. By evaluating healthcare access through a non-automobile lens, this study reframes transportation planning as both an equity issue and a public health opportunity. AN - dot:89712 ET - Research Brief KW - Public transit KW - Walkability KW - Health care facilities KW - Access KW - Transportation equity KW - Residents KW - Pedestrians KW - Multimodal transportation KW - Transit operating agencies KW - Pedestrian safety KW - Data analysis KW - Planning KW - Geospatial data KW - Evaluation LA - English PB - San Jose State University. College of Business. Mineta Transportation Institute PY - 2026-03-01 SN - 2509 TI - Equity Evaluation of Residents’ Transit+Walk Accessibility to Sacramento Healthcare Facilities [Research Brief] M3 - Brief N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89712 ER -
Impact of Takeoff Trajectory Design on Performance and Noise for Advanced Air Mobility Aircraft

Gonzalez, Victoria

;

Yeung, Seraphin H.

2025-12-01 | PDF

A broad range of AAM aircraft are currently in development, each with varying community noise footprints and energy consumption depending on the specifics of their departure and arrival flight trajectories, which must be understood for effective airspace integration. This work presents a framework for analyzing AAM trajectory design, focusing on ke ...

03/30/2026

Title : Impact of Takeoff Trajectory Design on Performance and Noise for Advanced Air Mobility Aircraft Creator(s) : Gonzalez, Victoria;Yeung, Seraphin H.;Huynh, Jacqueline L.;Hansman, R. John; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment;Massachusetts Institute of Technology; Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy Published Date : 2025-12-01 Report Number : eScholarship UC item 761269mb DOI : https://doi.org/10.2514/1.c038248 Gonzalez, Victoria et al. (2025). Impact of Takeoff Trajectory Design on Performance and Noise for Advanced Air Mobility Aircraft. https://doi.org/10.2514/1.c038248 Gonzalez, Victoria et al. "Impact of Takeoff Trajectory Design on Performance and Noise for Advanced Air Mobility Aircraft" (2025), https://doi.org/10.2514/1.c038248 Gonzalez, Victoria et al. "Impact of Takeoff Trajectory Design on Performance and Noise for Advanced Air Mobility Aircraft" , 2025, https://doi.org/10.2514/1.c038248 Export RIS Citation Information. TY - Journal Article AU - Gonzalez, Victoria AU - Yeung, Seraphin H. AU - Huynh, Jacqueline L. AU - Hansman, R. John A2 - United States. Department of Transportation. Federal Aviation Administration. Center of Excellence for Alternative Jet Fuels and Environment A2 - Massachusetts Institute of Technology A3 - United States. Department of Transportation. Federal Aviation Administration. Office of Environment and Energy AB - A broad range of AAM aircraft are currently in development, each with varying community noise footprints and energy consumption depending on the specifics of their departure and arrival flight trajectories, which must be understood for effective airspace integration. This work presents a framework for analyzing AAM trajectory design, focusing on key performance characteristics including community noise impact, energy consumption, and flight duration. The framework can be applied to diverse AAM vehicle types, as demonstrated in this work on a Blown-Flap Short Takeoff and Landing vehicle, a Tilt-Rotor Vertical Takeoff and Landing vehicle, and a Lift plus Cruise Vertical Takeoff and Landing vehicle. Results of comparing various takeoff procedures for each vehicle show trade-offs between community noise, energy consumption, and flight duration, highlighting the importance of strategic trajectory design. AB - This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) license https://creativecommons.org/licenses/by/4.0/. Please cite this article as: Impact of Takeoff Trajectory Design on Performance and Noise for Advanced Air Mobility Aircraft Victoria Gonzalez, Seraphin Yeung, Jacqueline Huynh, and R. John Hansman Journal of Aircraft 0 0:0, 1-16. https://doi.org/10.2514/1.c038248 AN - dot:89711 DO - https://doi.org/10.2514/1.c038248 KW - Flight paths KW - Aircraft KW - Mobility KW - Rotor blades KW - Flight control systems KW - VTOL aircraft KW - Energy consumption KW - STOL aircraft KW - Airspace KW - ASCENT LA - English PB - American Institute of Aeronautics and Astronautics PY - 2025-12-01 SN - eScholarship UC item 761269mb TI - Impact of Takeoff Trajectory Design on Performance and Noise for Advanced Air Mobility Aircraft M3 - Journal Article N1 - United States N1 - 13-C-AJFE-MIT-112, 131 N1 - Open Access; https://creativecommons.org/licenses/by/4.0/ UR - https://rosap.ntl.bts.gov/view/dot/89711 ER -
Speeches by Carlos C. Villarreal, Urban Mass Transportation Administrator: 1970

Villarreal, Carlos C.

1970-01-01 | PDF

Carlos C. (“C. C.”) Villarreal (1924-2010) served as the U.S. Department of Transportation’s Urban Mass Transportation Administrator (now the Federal Transit Administration) from 1969 to 1973. Before joining DOT, he worked as Vice-President for the Marquardt Corporation and served in the Navy from 1948 to 1957.

03/27/2026

Title : Speeches by Carlos C. Villarreal, Urban Mass Transportation Administrator: 1970 Creator(s) : Villarreal, Carlos C. Corporate Creator(s) : United States. Department of Transportation. Urban Mass Transportation Administration Published Date : 1970-01-01 DOI : https://doi.org/10.21949/dmxa-d939 Villarreal, Carlos C. (1970). Speeches by Carlos C. Villarreal, Urban Mass Transportation Administrator: 1970. https://doi.org/10.21949/dmxa-d939 Villarreal, Carlos C. "Speeches by Carlos C. Villarreal, Urban Mass Transportation Administrator: 1970" (1970), https://doi.org/10.21949/dmxa-d939 Villarreal, Carlos C. "Speeches by Carlos C. Villarreal, Urban Mass Transportation Administrator: 1970" , 1970, https://doi.org/10.21949/dmxa-d939 Export RIS Citation Information. TY - Speeches AU - Villarreal, Carlos C. A2 - United States. Department of Transportation. Urban Mass Transportation Administration AB - Carlos C. (“C. C.”) Villarreal (1924-2010) served as the U.S. Department of Transportation’s Urban Mass Transportation Administrator (now the Federal Transit Administration) from 1969 to 1973. Before joining DOT, he worked as Vice-President for the Marquardt Corporation and served in the Navy from 1948 to 1957. AN - dot:89710 DO - https://doi.org/10.21949/dmxa-d939 KW - Transportation policy KW - Public transit KW - Highway safety KW - Transportation safety KW - Traffic safety LA - English PB - United States. Department of Transportation PY - 1970-01-01 TI - Speeches by Carlos C. Villarreal, Urban Mass Transportation Administrator: 1970 M3 - Speeches N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89710 ER -
Speeches by Carlos C. Villarreal, Urban Mass Transportation Administrator:1969

Villarreal, Carlos C.

1969-01-01 | PDF

Carlos C. (“C. C.”) Villarreal (1924-2010) served as the U.S. Department of Transportation’s Urban Mass Transportation Administrator (now the Federal Transit Administration) from 1969 to 1973. Before joining DOT, he worked as Vice-President for the Marquardt Corporation and served in the Navy from 1948 to 1957.

03/27/2026

Title : Speeches by Carlos C. Villarreal, Urban Mass Transportation Administrator:1969 Creator(s) : Villarreal, Carlos C. Corporate Creator(s) : United States. Department of Transportation. Urban Mass Transportation Administration Published Date : 1969-01-01 DOI : https://doi.org/10.21949/tsk4-q205 Villarreal, Carlos C. (1969). Speeches by Carlos C. Villarreal, Urban Mass Transportation Administrator:1969. https://doi.org/10.21949/tsk4-q205 Villarreal, Carlos C. "Speeches by Carlos C. Villarreal, Urban Mass Transportation Administrator:1969" (1969), https://doi.org/10.21949/tsk4-q205 Villarreal, Carlos C. "Speeches by Carlos C. Villarreal, Urban Mass Transportation Administrator:1969" , 1969, https://doi.org/10.21949/tsk4-q205 Export RIS Citation Information. TY - Speeches AU - Villarreal, Carlos C. A2 - United States. Department of Transportation. Urban Mass Transportation Administration AB - Carlos C. (“C. C.”) Villarreal (1924-2010) served as the U.S. Department of Transportation’s Urban Mass Transportation Administrator (now the Federal Transit Administration) from 1969 to 1973. Before joining DOT, he worked as Vice-President for the Marquardt Corporation and served in the Navy from 1948 to 1957. AN - dot:89709 DO - https://doi.org/10.21949/tsk4-q205 KW - Transportation policy KW - Public transit KW - Highway safety KW - Transportation safety KW - Traffic safety LA - English PB - United States. Department of Transportation PY - 1969-01-01 TI - Speeches by Carlos C. Villarreal, Urban Mass Transportation Administrator:1969 M3 - Speeches N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89709 ER -
Statement of Diane K. Steed, Deputy Administrator, National Highway Traffic Safety Administration, before the Subcommittee on Courts, Senate Committee on the Judiciary

Steed, Diane K.

1981-11-06 | PDF

Statement of Diane K. Steed, Deputy Administrator, National Highway Traffic Safety Administration, Department of Transportation, before the Subcommittee on Courts, Senate Committee on the Judiciary, dealing with the problem of the drinking driver in the United States.

03/27/2026

Title : Statement of Diane K. Steed, Deputy Administrator, National Highway Traffic Safety Administration, before the Subcommittee on Courts, Senate Committee on the Judiciary Creator(s) : Steed, Diane K. Corporate Creator(s) : United States. Department of Transportation Published Date : 1981-11-06 DOI : https://doi.org/10.21949/n08x-ec10 Steed, Diane K. (1981). Statement of Diane K. Steed, Deputy Administrator, National Highway Traffic Safety Administration, before the Subcommittee on Courts, Senate Committee on the Judiciary. https://doi.org/10.21949/n08x-ec10 Steed, Diane K. "Statement of Diane K. Steed, Deputy Administrator, National Highway Traffic Safety Administration, before the Subcommittee on Courts, Senate Committee on the Judiciary" (1981), https://doi.org/10.21949/n08x-ec10 Steed, Diane K. "Statement of Diane K. Steed, Deputy Administrator, National Highway Traffic Safety Administration, before the Subcommittee on Courts, Senate Committee on the Judiciary" , 1981, https://doi.org/10.21949/n08x-ec10 Export RIS Citation Information. TY - Speeches AU - Steed, Diane K. A2 - United States. Department of Transportation AB - Statement of Diane K. Steed, Deputy Administrator, National Highway Traffic Safety Administration, Department of Transportation, before the Subcommittee on Courts, Senate Committee on the Judiciary, dealing with the problem of the drinking driver in the United States. AN - dot:89708 DO - https://doi.org/10.21949/n08x-ec10 KW - Drunk driving KW - Laws KW - Transportation policy KW - Traffic safety LA - English PB - United States. Department of Transportation PY - 1981-11-06 TI - Statement of Diane K. Steed, Deputy Administrator, National Highway Traffic Safety Administration, before the Subcommittee on Courts, Senate Committee on the Judiciary M3 - Speeches N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89708 ER -
Speeches by Quentin S. Taylor, Acting Assistant Administrator for Airports, Federal Aviation Administration: 1993

Quentin, Taylor S.

1993-01-01 | PDF

Tyler S. Quentins served as FAA's Deputy Administrator from 1977 to 1981, becoming the first African American to hold this role. A career civil servant, Taylor's FAA positions included Special Associate Administrator for Administration, FAA's first Director of Civil Rights, Deputy Director of the Alaskan Region; and Director of FAA's New England Re ...

03/27/2026

Title : Speeches by Quentin S. Taylor, Acting Assistant Administrator for Airports, Federal Aviation Administration: 1993 Creator(s) : Quentin, Taylor S. Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration Published Date : 1993-01-01 DOI : https://doi.org/10.21949/bh0h-s912 Quentin, Taylor S. (1993). Speeches by Quentin S. Taylor, Acting Assistant Administrator for Airports, Federal Aviation Administration: 1993. https://doi.org/10.21949/bh0h-s912 Quentin, Taylor S. "Speeches by Quentin S. Taylor, Acting Assistant Administrator for Airports, Federal Aviation Administration: 1993" (1993), https://doi.org/10.21949/bh0h-s912 Quentin, Taylor S. "Speeches by Quentin S. Taylor, Acting Assistant Administrator for Airports, Federal Aviation Administration: 1993" , 1993, https://doi.org/10.21949/bh0h-s912 Export RIS Citation Information. TY - Speeches AU - Quentin, Taylor S. A2 - United States. Department of Transportation. Federal Aviation Administration AB - Tyler S. Quentins served as FAA's Deputy Administrator from 1977 to 1981, becoming the first African American to hold this role. A career civil servant, Taylor's FAA positions included Special Associate Administrator for Administration, FAA's first Director of Civil Rights, Deputy Director of the Alaskan Region; and Director of FAA's New England Region. Following his term as deputy administrator, he continued his FAA career, serving in numerous positions, including Director of the Office of International Aviation, and Deputy Assistant Administrator for Airports. AN - dot:89707 DO - https://doi.org/10.21949/bh0h-s912 KW - Aviation KW - Air transportation policy KW - Airports KW - Budgeting KW - Economic factors LA - English PB - United States. Department of Transportation PY - 1993-01-01 TI - Speeches by Quentin S. Taylor, Acting Assistant Administrator for Airports, Federal Aviation Administration: 1993 M3 - Speeches N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89707 ER -
NHTSA News Releases: June 1995

United States. Department of Transportation. National Highway Traffic Safety Administration

1995-06-01 | NHTSA News Releases | PDF

Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives.

03/27/2026

Title : NHTSA News Releases: June 1995 Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 1995-06-01 Series : NHTSA News Releases DOI : https://doi.org/10.21949/wczn-qx04 United States. Department of Transportation. National Highway Traffic Safety Administration (1995). NHTSA News Releases: June 1995. https://doi.org/10.21949/wczn-qx04 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: June 1995" (1995), https://doi.org/10.21949/wczn-qx04 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: June 1995" , 1995, https://doi.org/10.21949/wczn-qx04 Export RIS Citation Information. TY - Press Release A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives. AN - dot:89706 DO - https://doi.org/10.21949/wczn-qx04 KW - Highway safety KW - Traffic safety KW - Standards KW - Equipment tests KW - Vehicle tests KW - Speed limits KW - Compliance KW - Recall campaigns KW - Policy, legislation and regulation LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 1995-06-01 T2 - NHTSA News Releases TI - NHTSA News Releases: June 1995 M3 - Press Release N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89706 ER -
NHTSA News Releases: July-December 1995

United States. Department of Transportation. National Highway Traffic Safety Administration

1995-07-01 | NHTSA News Releases | PDF

Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives.

03/27/2026

Title : NHTSA News Releases: July-December 1995 Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 1995-07-01 Series : NHTSA News Releases DOI : https://doi.org/10.21949/z26f-g971 United States. Department of Transportation. National Highway Traffic Safety Administration (1995). NHTSA News Releases: July-December 1995. https://doi.org/10.21949/z26f-g971 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: July-December 1995" (1995), https://doi.org/10.21949/z26f-g971 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: July-December 1995" , 1995, https://doi.org/10.21949/z26f-g971 Export RIS Citation Information. TY - Press Release A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives. AN - dot:89705 DO - https://doi.org/10.21949/z26f-g971 KW - Highway safety KW - Traffic safety KW - Standards KW - Equipment tests KW - Vehicle tests KW - Speed limits KW - Compliance KW - Recall campaigns KW - Policy, legislation and regulation LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 1995-07-01 T2 - NHTSA News Releases TI - NHTSA News Releases: July-December 1995 M3 - Press Release N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89705 ER -
NHTSA News Releases: January 1995

United States. Department of Transportation. National Highway Traffic Safety Administration

1995-01-01 | NHTSA News Releases | PDF

Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives.

03/27/2026

Title : NHTSA News Releases: January 1995 Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 1995-01-01 Series : NHTSA News Releases DOI : https://doi.org/10.21949/y23q-wf56 United States. Department of Transportation. National Highway Traffic Safety Administration (1995). NHTSA News Releases: January 1995. https://doi.org/10.21949/y23q-wf56 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: January 1995" (1995), https://doi.org/10.21949/y23q-wf56 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: January 1995" , 1995, https://doi.org/10.21949/y23q-wf56 Export RIS Citation Information. TY - Press Release A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives. AN - dot:89704 DO - https://doi.org/10.21949/y23q-wf56 KW - Highway safety KW - Traffic safety KW - Standards KW - Equipment tests KW - Vehicle tests KW - Speed limits KW - Compliance KW - Recall campaigns KW - Policy, legislation and regulation LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 1995-01-01 T2 - NHTSA News Releases TI - NHTSA News Releases: January 1995 M3 - Press Release N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89704 ER -
NHTSA News Releases: February-March 1995

United States. Department of Transportation. National Highway Traffic Safety Administration

1995-02-01 | NHTSA News Releases | PDF

Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives.

03/27/2026

Title : NHTSA News Releases: February-March 1995 Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 1995-02-01 Series : NHTSA News Releases DOI : https://doi.org/10.21949/z7pc-fv15 United States. Department of Transportation. National Highway Traffic Safety Administration (1995). NHTSA News Releases: February-March 1995. https://doi.org/10.21949/z7pc-fv15 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: February-March 1995" (1995), https://doi.org/10.21949/z7pc-fv15 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: February-March 1995" , 1995, https://doi.org/10.21949/z7pc-fv15 Export RIS Citation Information. TY - Press Release A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives. AN - dot:89703 DO - https://doi.org/10.21949/z7pc-fv15 KW - Highway safety KW - Traffic safety KW - Standards KW - Equipment tests KW - Vehicle tests KW - Speed limits KW - Compliance KW - Recall campaigns KW - Policy, legislation and regulation LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 1995-02-01 T2 - NHTSA News Releases TI - NHTSA News Releases: February-March 1995 M3 - Press Release N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89703 ER -
NHTSA News Releases: April-May 1995

United States. Department of Transportation. National Highway Traffic Safety Administration

1995-04-01 | NHTSA News Releases | PDF

Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives.

03/27/2026

Title : NHTSA News Releases: April-May 1995 Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 1995-04-01 Series : NHTSA News Releases DOI : https://doi.org/10.21949/h0j4-vg18 United States. Department of Transportation. National Highway Traffic Safety Administration (1995). NHTSA News Releases: April-May 1995. https://doi.org/10.21949/h0j4-vg18 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: April-May 1995" (1995), https://doi.org/10.21949/h0j4-vg18 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: April-May 1995" , 1995, https://doi.org/10.21949/h0j4-vg18 Export RIS Citation Information. TY - Press Release A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives. AN - dot:89702 DO - https://doi.org/10.21949/h0j4-vg18 KW - Highway safety KW - Traffic safety KW - Standards KW - Equipment tests KW - Vehicle tests KW - Speed limits KW - Compliance KW - Recall campaigns KW - Policy, legislation and regulation LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 1995-04-01 T2 - NHTSA News Releases TI - NHTSA News Releases: April-May 1995 M3 - Press Release N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89702 ER -
NHTSA News Releases: July-December 1979

United States. Department of Transportation. National Highway Traffic Safety Administration

1979-07-01 | NHTSA News Releases | PDF

Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives.

03/27/2026

Title : NHTSA News Releases: July-December 1979 Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 1979-07-01 Series : NHTSA News Releases DOI : https://doi.org/10.21949/71f5-f234 United States. Department of Transportation. National Highway Traffic Safety Administration (1979). NHTSA News Releases: July-December 1979. https://doi.org/10.21949/71f5-f234 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: July-December 1979" (1979), https://doi.org/10.21949/71f5-f234 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: July-December 1979" , 1979, https://doi.org/10.21949/71f5-f234 Export RIS Citation Information. TY - Press Release A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives. AN - dot:89701 DO - https://doi.org/10.21949/71f5-f234 KW - Highway safety KW - Traffic safety KW - Standards KW - Equipment tests KW - Vehicle tests KW - Speed limits KW - Compliance KW - Recall campaigns KW - Policy, legislation and regulation LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 1979-07-01 T2 - NHTSA News Releases TI - NHTSA News Releases: July-December 1979 M3 - Press Release N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89701 ER -
NHTSA News Releases: January-June 1979

United States. Department of Transportation. National Highway Traffic Safety Administration

1979-01-01 | NHTSA News Releases | PDF

Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives.

03/27/2026

Title : NHTSA News Releases: January-June 1979 Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 1979-01-01 Series : NHTSA News Releases DOI : https://doi.org/10.21949/214y-1590 United States. Department of Transportation. National Highway Traffic Safety Administration (1979). NHTSA News Releases: January-June 1979. https://doi.org/10.21949/214y-1590 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: January-June 1979" (1979), https://doi.org/10.21949/214y-1590 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: January-June 1979" , 1979, https://doi.org/10.21949/214y-1590 Export RIS Citation Information. TY - Press Release A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives. AN - dot:89700 DO - https://doi.org/10.21949/214y-1590 KW - Highway safety KW - Traffic safety KW - Standards KW - Equipment tests KW - Vehicle tests KW - Speed limits KW - Compliance KW - Recall campaigns KW - Policy, legislation and regulation LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 1979-01-01 T2 - NHTSA News Releases TI - NHTSA News Releases: January-June 1979 M3 - Press Release N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89700 ER -
NHTSA News Releases: July-December 1978

United States. Department of Transportation. National Highway Traffic Safety Administration

1978-07-01 | NHTSA News Releases | PDF

Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives.

03/27/2026

Title : NHTSA News Releases: July-December 1978 Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 1978-07-01 Series : NHTSA News Releases DOI : https://doi.org/10.21949/gys3-pt74 United States. Department of Transportation. National Highway Traffic Safety Administration (1978). NHTSA News Releases: July-December 1978. https://doi.org/10.21949/gys3-pt74 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: July-December 1978" (1978), https://doi.org/10.21949/gys3-pt74 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: July-December 1978" , 1978, https://doi.org/10.21949/gys3-pt74 Export RIS Citation Information. TY - Press Release A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives. AN - dot:89699 DO - https://doi.org/10.21949/gys3-pt74 KW - Highway safety KW - Traffic safety KW - Standards KW - Equipment tests KW - Vehicle tests KW - Speed limits KW - Compliance KW - Recall campaigns KW - Policy, legislation and regulation LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 1978-07-01 T2 - NHTSA News Releases TI - NHTSA News Releases: July-December 1978 M3 - Press Release N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89699 ER -
NHTSA News Releases: January-June 1978

United States. Department of Transportation. National Highway Traffic Safety Administration

1978-01-01 | NHTSA News Releases | PDF

Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives.

03/27/2026

Title : NHTSA News Releases: January-June 1978 Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 1978-01-01 Series : NHTSA News Releases DOI : https://doi.org/10.21949/q21w-s205 United States. Department of Transportation. National Highway Traffic Safety Administration (1978). NHTSA News Releases: January-June 1978. https://doi.org/10.21949/q21w-s205 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: January-June 1978" (1978), https://doi.org/10.21949/q21w-s205 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: January-June 1978" , 1978, https://doi.org/10.21949/q21w-s205 Export RIS Citation Information. TY - Press Release A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives. AN - dot:89698 DO - https://doi.org/10.21949/q21w-s205 KW - Highway safety KW - Traffic safety KW - Standards KW - Equipment tests KW - Vehicle tests KW - Speed limits KW - Compliance KW - Recall campaigns KW - Policy, legislation and regulation LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 1978-01-01 T2 - NHTSA News Releases TI - NHTSA News Releases: January-June 1978 M3 - Press Release N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89698 ER -
NHTSA News Releases: January-July 1977

United States. Department of Transportation. National Highway Traffic Safety Administration

1977-01-01 | NHTSA News Releases | PDF

Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives.

03/27/2026

Title : NHTSA News Releases: January-July 1977 Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 1977-01-01 Series : NHTSA News Releases DOI : https://doi.org/10.21949/c3gn-x323 United States. Department of Transportation. National Highway Traffic Safety Administration (1977). NHTSA News Releases: January-July 1977. https://doi.org/10.21949/c3gn-x323 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: January-July 1977" (1977), https://doi.org/10.21949/c3gn-x323 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: January-July 1977" , 1977, https://doi.org/10.21949/c3gn-x323 Export RIS Citation Information. TY - Press Release A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives. AN - dot:89697 DO - https://doi.org/10.21949/c3gn-x323 KW - Highway safety KW - Traffic safety KW - Standards KW - Equipment tests KW - Vehicle tests KW - Speed limits KW - Compliance KW - Recall campaigns KW - Policy, legislation and regulation LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 1977-01-01 T2 - NHTSA News Releases TI - NHTSA News Releases: January-July 1977 M3 - Press Release N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89697 ER -
NHTSA News Releases: August-December 1977

United States. Department of Transportation. National Highway Traffic Safety Administration

1977-08-01 | NHTSA News Releases | PDF

Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives.

03/27/2026

Title : NHTSA News Releases: August-December 1977 Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 1977-08-01 Series : NHTSA News Releases DOI : https://doi.org/10.21949/v2z2-kx51 United States. Department of Transportation. National Highway Traffic Safety Administration (1977). NHTSA News Releases: August-December 1977. https://doi.org/10.21949/v2z2-kx51 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: August-December 1977" (1977), https://doi.org/10.21949/v2z2-kx51 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: August-December 1977" , 1977, https://doi.org/10.21949/v2z2-kx51 Export RIS Citation Information. TY - Press Release A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives. AN - dot:89696 DO - https://doi.org/10.21949/v2z2-kx51 KW - Highway safety KW - Traffic safety KW - Standards KW - Equipment tests KW - Vehicle tests KW - Speed limits KW - Compliance KW - Recall campaigns KW - Policy, legislation and regulation LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 1977-08-01 T2 - NHTSA News Releases TI - NHTSA News Releases: August-December 1977 M3 - Press Release N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89696 ER -
NHTSA News Releases: July-December 1976

United States. Department of Transportation. National Highway Traffic Safety Administration

1976-07-01 | NHTSA News Releases | PDF

Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives.

03/27/2026

Title : NHTSA News Releases: July-December 1976 Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 1976-07-01 Series : NHTSA News Releases DOI : https://doi.org/10.21949/n443-gh41 United States. Department of Transportation. National Highway Traffic Safety Administration (1976). NHTSA News Releases: July-December 1976. https://doi.org/10.21949/n443-gh41 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: July-December 1976" (1976), https://doi.org/10.21949/n443-gh41 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: July-December 1976" , 1976, https://doi.org/10.21949/n443-gh41 Export RIS Citation Information. TY - Press Release A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives. AN - dot:89695 DO - https://doi.org/10.21949/n443-gh41 KW - Highway safety KW - Traffic safety KW - Standards KW - Equipment tests KW - Vehicle tests KW - Speed limits KW - Compliance KW - Recall campaigns KW - Policy, legislation and regulation LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 1976-07-01 T2 - NHTSA News Releases TI - NHTSA News Releases: July-December 1976 M3 - Press Release N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89695 ER -
NHTSA News Releases: January-March 1976

United States. Department of Transportation. National Highway Traffic Safety Administration

1976-01-01 | NHTSA News Releases | PDF

Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives.

03/27/2026

Title : NHTSA News Releases: January-March 1976 Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 1976-01-01 Series : NHTSA News Releases DOI : https://doi.org/10.21949/2np9-h740 United States. Department of Transportation. National Highway Traffic Safety Administration (1976). NHTSA News Releases: January-March 1976. https://doi.org/10.21949/2np9-h740 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: January-March 1976" (1976), https://doi.org/10.21949/2np9-h740 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: January-March 1976" , 1976, https://doi.org/10.21949/2np9-h740 Export RIS Citation Information. TY - Press Release A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives. AN - dot:89694 DO - https://doi.org/10.21949/2np9-h740 KW - Highway safety KW - Traffic safety KW - Standards KW - Equipment tests KW - Vehicle tests KW - Speed limits KW - Compliance KW - Recall campaigns KW - Policy, legislation and regulation LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 1976-01-01 T2 - NHTSA News Releases TI - NHTSA News Releases: January-March 1976 M3 - Press Release N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89694 ER -
NHTSA News Releases: January-March 1975

United States. Department of Transportation. National Highway Traffic Safety Administration

1975-01-01 | NHTSA News Releases | PDF

Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives.

03/27/2026

Title : NHTSA News Releases: January-March 1975 Corporate Creator(s) : United States. Department of Transportation. National Highway Traffic Safety Administration Published Date : 1975-01-01 Series : NHTSA News Releases DOI : https://doi.org/10.21949/3x7d-5r30 United States. Department of Transportation. National Highway Traffic Safety Administration (1975). NHTSA News Releases: January-March 1975. https://doi.org/10.21949/3x7d-5r30 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: January-March 1975" (1975), https://doi.org/10.21949/3x7d-5r30 United States. Department of Transportation. National Highway Traffic Safety Administration "NHTSA News Releases: January-March 1975" , 1975, https://doi.org/10.21949/3x7d-5r30 Export RIS Citation Information. TY - Press Release A2 - United States. Department of Transportation. National Highway Traffic Safety Administration AB - Press releases from the National Highway Traffic Safety Administration (NHTSA) provided news about vehicle recall campaigns, motor vehicle safety regulations, manufacturer inspection and investigation results, and highway and traffic safety initiatives. AN - dot:89693 DO - https://doi.org/10.21949/3x7d-5r30 KW - Highway safety KW - Traffic safety KW - Standards KW - Equipment tests KW - Vehicle tests KW - Speed limits KW - Compliance KW - Recall campaigns KW - Policy, legislation and regulation LA - English PB - United States. Department of Transportation. National Highway Traffic Safety Administration PY - 1975-01-01 T2 - NHTSA News Releases TI - NHTSA News Releases: January-March 1975 M3 - Press Release N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/89693 ER -

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