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Showing 381 - 400 of 501 results

Evaluation of Low-Temperature Cracking (LTC) Performance Testing Methods to Assess Nebraska Asphalt Mixtures

Bastola, Nitish R. ;

Teixeira, Jamilla E. S. L.

2026-06-01 | PDF

Current advancements in asphalt mixture design in the United States are increasingly shifting toward performance-based specifications, particularly through implementation of the Balanced Mix Design (BMD) framework. However, most existing BMD protocols primarily emphasize rutting and mid-temperature cracking resistance, often overlooking low-tempera ...

08/10/2026

Title : Evaluation of Low-Temperature Cracking (LTC) Performance Testing Methods to Assess Nebraska Asphalt Mixtures Creator(s) : Bastola, Nitish R.;Teixeira, Jamilla E. S. L.;Ho, Chun-Hsing; Corporate Creator(s) : University of Nebraska--Lincoln. Charles W. Durham School of Architectural Engineering and Construction;University of Nebraska--Lincoln. Nebraska Transportation Center; Corporate Contributor(s) : Nebraska. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-06-01 Report Number : SPR-FY25(039) URL : https://rosap.ntl.bts.gov/view/dot/92841
Bastola, N. R., Teixeira, J. E. S. L., & Ho, C. H. (2026). Evaluation of Low-Temperature Cracking (LTC) Performance Testing Methods to Assess Nebraska Asphalt Mixtures (Report No. SPR-FY25(039)). Nebraska. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/92841

Bastola, Nitish R., Jamilla E. S. L. Teixeira, and Chun-Hsing Ho. Evaluation of Low-Temperature Cracking (LTC) Performance Testing Methods to Assess Nebraska Asphalt Mixtures. Report no. SPR-FY25(039). Nebraska. Department of Transportation, 2026. https://rosap.ntl.bts.gov/view/dot/92841.

Bastola, Nitish R., et al. Evaluation of Low-Temperature Cracking (LTC) Performance Testing Methods to Assess Nebraska Asphalt Mixtures. Nebraska. Department of Transportation, 2026, Report no. SPR-FY25(039), ROSA P. https://rosap.ntl.bts.gov/view/dot/92841.
Export RIS Citation Information. TY - Tech Report AU - Bastola, Nitish R. AU - Teixeira, Jamilla E. S. L. AU - Ho, Chun-Hsing A2 - University of Nebraska--Lincoln. Charles W. Durham School of Architectural Engineering and Construction A2 - University of Nebraska--Lincoln. Nebraska Transportation Center A3 - Nebraska. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Current advancements in asphalt mixture design in the United States are increasingly shifting toward performance-based specifications, particularly through implementation of the Balanced Mix Design (BMD) framework. However, most existing BMD protocols primarily emphasize rutting and mid-temperature cracking resistance, often overlooking low-temperature cracking (LTC),which is a critical distress mode in cold-climate regions. This study aims to investigate LTC performance-based methodologies for the asphalt mix design to support the development of a Nebraska BMD framework. With that, selection of appropriate LTC performance tests that can be sensitive to Nebraska recycled mixture's variables was the main goal developed in this phase of study. To this end, well-established mixture-level LTC tests were sought, including Semi-Circular Bending (SCB) test, Indirect Tensile(IDT) Creep/Strength Test, and Bending Beam Rheometer (BBR) for mixtures, and performance parameters from different mixtures were compared. Dynamic modulus (DM) test was also conducted to verify potential differences in mixture's stiffness at sub-zero temperature. Additionally, commonly used binder level tests (DSR and BBR) and IDEAL-CT tests were performed to complete the binder and mixture performance characterization, respectively. Three Nebraska recycled mixtures subjected to short- and long-term aging protocols were selected in this initial phase of the study, being two SPR mixtures (SPR1 and SPR2) and one SLX. Binder-level results highlighted the limitations of binder testing in differentiating the LTC performance of the studied recycled mixtures. At the mixture level, lab-produced SPR mixtures exhibited different LTC performance trends. SCB fracture energy and IDT creep compliance were the only index parameters that consistently captured these differences. Plant-produced SPR and SLX mixtures confirmed the sensitivity of selected performance-based index parameters to differentiate the mixture's LTC resistance. Finally, these laboratory-derived indicators were compared against observed field thermal cracking performance to assess the predictive accuracy and applicability of the laboratory test methods at a field-production scale. Findings from this report must be extended for a broad range of mixtures and site locations. AN - dot:92841 DA - 2026-06-01 ET - Final Report KW - Mix design KW - Low temperature KW - Cracking KW - Recycled materials KW - Mixtures KW - Performance evaluations KW - Asphalt mixtures KW - Laboratory tests KW - Evaluation KW - Balanced mix design KW - low-temperature KW - cracking resistance KW - recycled asphalt KW - mixtures. LA - English PB - Nebraska. Department of Transportation PY - 2026 SN - SPR-FY25(039) TI - Evaluation of Low-Temperature Cracking (LTC) Performance Testing Methods to Assess Nebraska Asphalt Mixtures M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92841 ER -
Development of Accurate and Reliable Annual Average Daily Traffic Factoring Methods

Zhao, Li ;

Madarshahian, Mahyar

2026-04-15 | PDF

Accurate estimation of Annual Average Daily Traffic (AADT) is essential for the Nebraska Department of Transportation (NDOT)to support planning, design, safety evaluation, asset management, and federal reporting requirements. Because continuous traffic monitoring is not feasible at every roadway location, NDOT relies on short-term traffic counts th ...

08/10/2026

Title : Development of Accurate and Reliable Annual Average Daily Traffic Factoring Methods Creator(s) : Zhao, Li;Madarshahian, Mahyar;Sadeghnejad, Amirmohammad;Huynh, Nathan; Corporate Creator(s) : University of Nebraska--Lincoln. Nebraska Transportation Center Corporate Contributor(s) : Nebraska. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-04-15 Report Number : SPR-FY25(048);26-1121-4071-001; URL : https://rosap.ntl.bts.gov/view/dot/92840
Zhao, L., Madarshahian, M., Sadeghnejad, A., & Huynh, N. (2026). Development of Accurate and Reliable Annual Average Daily Traffic Factoring Methods (Report No. SPR-FY25(048)). Nebraska. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/92840

Zhao, Li, Mahyar Madarshahian, Amirmohammad Sadeghnejad, and Nathan Huynh. Development of Accurate and Reliable Annual Average Daily Traffic Factoring Methods. Report no. SPR-FY25(048). Nebraska. Department of Transportation, 2026. https://rosap.ntl.bts.gov/view/dot/92840.

Zhao, Li, et al. Development of Accurate and Reliable Annual Average Daily Traffic Factoring Methods. Nebraska. Department of Transportation, 2026, Report no. SPR-FY25(048), ROSA P. https://rosap.ntl.bts.gov/view/dot/92840.
Export RIS Citation Information. TY - Tech Report AU - Zhao, Li AU - Madarshahian, Mahyar AU - Sadeghnejad, Amirmohammad AU - Huynh, Nathan A2 - University of Nebraska--Lincoln. Nebraska Transportation Center A3 - Nebraska. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Accurate estimation of Annual Average Daily Traffic (AADT) is essential for the Nebraska Department of Transportation (NDOT)to support planning, design, safety evaluation, asset management, and federal reporting requirements. Because continuous traffic monitoring is not feasible at every roadway location, NDOT relies on short-term traffic counts that are expanded to annual values using temporal adjustment factors (TAFs). The selection of appropriate temporal factors directly affects the reliability of AADT estimates and, consequently, the quality of transportation investment decisions. NDOT's current practice primarily relies on month of-the-year-based adjustment factors, with additional day-of-week considerations. While this approach follows national guidance, the performance of alternative temporal adjustment structures has not been systematically evaluated under Nebraska-specific traffic conditions. Differences in seasonal variation, holiday effects, and roadway functional characteristics may influence the accuracy of various temporal aggregation levels. Therefore, a comprehensive assessment of candidate temporal adjustment factors was necessary to determine the most accurate and reliable approach for estimating AADT from short-term counts in Nebraska. The objective of this project was to evaluate multiple temporal adjustment factor structures and identify the most suitable options for NDOT's roadway functional groups. Eleven temporal adjustment factor structures were evaluated, ranging from monthly to daily and week-based configurations. Performance was assessed using error-based metrics that compare estimated AADT values against ATR-derived annual averages. To support implementation, this project developed an Excel-based tool that incorporates the three recommended temporal adjustment factors. The tool automates data formatting, factor calculation, AADT estimation, and error evaluation. It is designed to be user-friendly and compatible with NDOT's existing workflow, minimizing implementation barriers. The tool allows engineers to select among the recommended factor options depending on data availability and operational needs. The findings of this study provide NDOT with a data-driven basis for improving AADT estimation practices. Adoption of the recommended temporal adjustment factors, particularly in combination with 48-hour short-term counts when feasible, can enhance the reliability of AADT values used in planning, safety analysis, and funding allocation decisions. The accompanying implementation tool further facilitates practical application of the research results. AN - dot:92840 DA - 2026-04-15 ET - Final Report: 07/01/2024 - 5/31/2026 KW - Traffic surveillance KW - Data analysis KW - Sampling KW - Quantitative metrics KW - Quality control KW - Transportation planning LA - English PB - Nebraska. Department of Transportation PY - 2026 SN - SPR-FY25(048) TI - Development of Accurate and Reliable Annual Average Daily Traffic Factoring Methods M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92840 ER -
Track Buckling Prevention and Improved Rail Stress Management (Module 2)

Kish, Andrew

2023-07-31 | PDF

Building on foundational CWR principles, this module covers advanced CWR maintenance practices and stress management solutions. Key topics include managing rail neutral temperature (RNT) variations, executing RNT readjustments following rail breaks or defect repairs, and applying modern best practices such as utilizing the RNT-RESTORE software appl ...

08/10/2026

Title : Track Buckling Prevention and Improved Rail Stress Management (Module 2) Creator(s) : Kish, Andrew Corporate Creator(s) : Kandrew Inc. Consulting Services Corporate Contributor(s) : United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology Published Date : 2023-07-31 URL : https://rosap.ntl.bts.gov/view/dot/92839
Kish, A. (2023). Track Buckling Prevention and Improved Rail Stress Management (Module 2). United States. Department of Transportation. Federal Railroad Administration. https://rosap.ntl.bts.gov/view/dot/92839

Kish, Andrew. Track Buckling Prevention and Improved Rail Stress Management (Module 2). United States. Department of Transportation. Federal Railroad Administration, 2023. https://rosap.ntl.bts.gov/view/dot/92839.

Kish, Andrew Track Buckling Prevention and Improved Rail Stress Management (Module 2). United States. Department of Transportation. Federal Railroad Administration, 2023, ROSA P. https://rosap.ntl.bts.gov/view/dot/92839.
Export RIS Citation Information. TY - Presentations AU - Kish, Andrew A2 - Kandrew Inc. Consulting Services A3 - United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology AB - Building on foundational CWR principles, this module covers advanced CWR maintenance practices and stress management solutions. Key topics include managing rail neutral temperature (RNT) variations, executing RNT readjustments following rail breaks or defect repairs, and applying modern best practices such as utilizing the RNT-RESTORE software application. The training also details standard procedures for CWR destressing to maintain track stability and overall operational safety. AN - dot:92839 DA - 2023-07-31 KW - Railroad tracks KW - Buckling KW - Continuous welded rail KW - Temperature LA - English PB - United States. Department of Transportation. Federal Railroad Administration PY - 2023 TI - Track Buckling Prevention and Improved Rail Stress Management (Module 2) M3 - Presentations N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92839 ER -
Track Buckling Prevention and Improved Rail Stress Management (Module 1)

Kish, Andrew

2023-07-31 | PDF

This module provides a foundational overview of continuous welded rail (CWR) management, focusing on track buckling prevention and rail stress management principles. Topics covered include CWR plans and procedures, track buckling mechanics, and key governing parameters such as track lateral resistance, curvature and line defects, train loads and dy ...

08/10/2026

Title : Track Buckling Prevention and Improved Rail Stress Management (Module 1) Creator(s) : Kish, Andrew Corporate Creator(s) : Kandrew Inc. Consulting Services Corporate Contributor(s) : United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology Published Date : 2023-07-31 URL : https://rosap.ntl.bts.gov/view/dot/92838
Kish, A. (2023). Track Buckling Prevention and Improved Rail Stress Management (Module 1). United States. Department of Transportation. Federal Railroad Administration. https://rosap.ntl.bts.gov/view/dot/92838

Kish, Andrew. Track Buckling Prevention and Improved Rail Stress Management (Module 1). United States. Department of Transportation. Federal Railroad Administration, 2023. https://rosap.ntl.bts.gov/view/dot/92838.

Kish, Andrew Track Buckling Prevention and Improved Rail Stress Management (Module 1). United States. Department of Transportation. Federal Railroad Administration, 2023, ROSA P. https://rosap.ntl.bts.gov/view/dot/92838.
Export RIS Citation Information. TY - Presentations AU - Kish, Andrew A2 - Kandrew Inc. Consulting Services A3 - United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology AB - This module provides a foundational overview of continuous welded rail (CWR) management, focusing on track buckling prevention and rail stress management principles. Topics covered include CWR plans and procedures, track buckling mechanics, and key governing parameters such as track lateral resistance, curvature and line defects, train loads and dynamics, and rail neutral temperature . Additionally, the training details critical safety concepts, the track buckling prevention formula, and industry best practice guidelines for effective CWR safety management. AN - dot:92838 DA - 2023-07-31 KW - Railroad tracks KW - Buckling KW - Continuous welded rail KW - Temperature LA - English PB - United States. Department of Transportation. Federal Railroad Administration PY - 2023 TI - Track Buckling Prevention and Improved Rail Stress Management (Module 1) M3 - Presentations N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92838 ER -
Track Geometry and Vehicle Performance Parametric Study Using NUCARS®

Meddah, Abe

;

Urban, Curtis

2026-07-29 | PDF

The Federal Railroad Administration (FRA) sponsored an all-inclusive parametric study using NUCARS® to assess vehicle performance of five vehicle types over analytically-defined track perturbations. The research team performed the vehicle performance assessment using criteria from both the Association of American Railroads' Chapter 11 and FRA Title ...

08/10/2026

Title : Track Geometry and Vehicle Performance Parametric Study Using NUCARS® Creator(s) : Meddah, Abe;Urban, Curtis; Corporate Creator(s) : Transportation Technology Center, Inc. Corporate Contributor(s) : United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology Published Date : 2026-07-29 Report Number : DOT/FRA/ORD-26/08 URL : https://rosap.ntl.bts.gov/view/dot/92837
Meddah, A., & Urban, C. (2026). Track Geometry and Vehicle Performance Parametric Study Using NUCARS® (Report No. DOT/FRA/ORD-26/08). United States. Department of Transportation. Federal Railroad Administration. https://rosap.ntl.bts.gov/view/dot/92837

Meddah, Abe and Curtis Urban. Track Geometry and Vehicle Performance Parametric Study Using NUCARS®. Report no. DOT/FRA/ORD-26/08. United States. Department of Transportation. Federal Railroad Administration, 2026. https://rosap.ntl.bts.gov/view/dot/92837.

Meddah, Abe, and Curtis Urban Track Geometry and Vehicle Performance Parametric Study Using NUCARS®. United States. Department of Transportation. Federal Railroad Administration, 2026, Report no. DOT/FRA/ORD-26/08, ROSA P. https://rosap.ntl.bts.gov/view/dot/92837.
Export RIS Citation Information. TY - Tech Report AU - Meddah, Abe AU - Urban, Curtis A2 - Transportation Technology Center, Inc. A3 - United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology A4 - Meddah, Abe AB - The Federal Railroad Administration (FRA) sponsored an all-inclusive parametric study using NUCARS® to assess vehicle performance of five vehicle types over analytically-defined track perturbations. The research team performed the vehicle performance assessment using criteria from both the Association of American Railroads' Chapter 11 and FRA Title 49 Transportation Code of Federal Regulations Part 213 Track Safety Standards. In the simulation work, a matrix of the maximum allowable limits for track alignment, surface and cross-level deviations over Track Classes 1 through 5 was used. The simulation matrix included single track deviations as well as synchronized combined track deviations. AN - dot:92837 DA - 2026-07-29 ET - Final Report KW - Vehicle dynamics KW - Rolling contact KW - Railroad tracks KW - Plane geometry KW - NUCARS LA - English PB - United States. Department of Transportation. Federal Railroad Administration PY - 2026 SN - DOT/FRA/ORD-26/08 TI - Track Geometry and Vehicle Performance Parametric Study Using NUCARS® M3 - Tech Report N1 - United States N1 - DTFR53-11-D-00008 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92837 ER -
Wheel Failure Investigation Program: Phase 3 [2026]

Sherrock, Eric

;

Gagnon, Ron

2026-07-30 | PDF

Vertical split rims (VSRs) are one of the leading causes for wheel removals in North American freight rail service. The Federal Railroad Administration funded a research effort in which a group of researchers and subject matter experts explored a better understanding of VSRs using finite element analysis. The analysis was intended to identify the r ...

08/10/2026

Title : Wheel Failure Investigation Program: Phase 3 [2026] Creator(s) : Sherrock, Eric;Gagnon, Ron;Dedmon, Steven L.;Alvarez-Reyes, Alejandro; Corporate Creator(s) : ENSCO, Inc Corporate Contributor(s) : United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology Published Date : 2026-07-30 Report Number : DOT/FRA/ORD-26/12 URL : https://rosap.ntl.bts.gov/view/dot/92836
Sherrock, E., Gagnon, R., Dedmon, S. L., & Alvarez-Reyes, A. (2026). Wheel Failure Investigation Program: Phase 3 [2026] (Report No. DOT/FRA/ORD-26/12). United States. Department of Transportation. Federal Railroad Administration. https://rosap.ntl.bts.gov/view/dot/92836

Sherrock, Eric, Ron Gagnon, Steven L. Dedmon, and Alejandro Alvarez-Reyes. Wheel Failure Investigation Program: Phase 3 [2026]. Report no. DOT/FRA/ORD-26/12. United States. Department of Transportation. Federal Railroad Administration, 2026. https://rosap.ntl.bts.gov/view/dot/92836.

Sherrock, Eric, et al. Wheel Failure Investigation Program: Phase 3 [2026]. United States. Department of Transportation. Federal Railroad Administration, 2026, Report no. DOT/FRA/ORD-26/12, ROSA P. https://rosap.ntl.bts.gov/view/dot/92836.
Export RIS Citation Information. TY - Tech Report AU - Sherrock, Eric AU - Gagnon, Ron AU - Dedmon, Steven L. AU - Alvarez-Reyes, Alejandro A2 - ENSCO, Inc A3 - United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and Technology A4 - Stewart, Monique Ferguson; Gordon, Jeffrey AB - Vertical split rims (VSRs) are one of the leading causes for wheel removals in North American freight rail service. The Federal Railroad Administration funded a research effort in which a group of researchers and subject matter experts explored a better understanding of VSRs using finite element analysis. The analysis was intended to identify the relative contributions of factors that can lead to VSR failures with a goal of establishing approaches to minimizing derailments associated with these wheel failures. In February 2016, researchers established a multi-phase research program to comprehensively understand various wheel failure mechanisms, identify major contributing factors, arrive at potential strategies to mitigate the failures, and consequently improve the safety of rail network operations. Since the beginning of this effort, research has been conducted under the guidance of a stakeholder working group made up of members of the Association of American Railroads, North American wheel manufacturers, and researchers. AN - dot:92836 DA - 2026-07-30 ET - Final Report KW - Wheels KW - Failure KW - Wheel rims KW - Flanges KW - Structural plates KW - Cracking KW - Defects KW - Failure analysis KW - Laboratory tests KW - Railroad wheels LA - English PB - United States. Department of Transportation. Federal Railroad Administration PY - 2026 SN - DOT/FRA/ORD-26/12 TI - Wheel Failure Investigation Program: Phase 3 [2026] M3 - Tech Report N1 - United States N1 - 693JJ619F000103 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92836 ER -
Thermal Protection System Evaluation for Hazardous Materials Car Tanks

Jimenez, Alejandro

;

Chialvo, Sebastian

2026-07-30 | PDF

The Federal Railroad Administration sponsored a research team from Engineering Services, Inc. to perform an analysis of the effectiveness of the thermal protection system on a DOT-117 rail car as a fire protection measure. This research was carried out between February 2022 and March 2023 at multiple ESi locations; the experimental tests were perfo ...

08/10/2026

Title : Thermal Protection System Evaluation for Hazardous Materials Car Tanks Creator(s) : Jimenez, Alejandro;Chialvo, Sebastian; Corporate Creator(s) : Engineering Systems Inc Corporate Contributor(s) : United States. Department of Transportation. Federal Railroad Administration Published Date : 2026-07-30 Report Number : DOT/FRA/ORD-26/11 URL : https://rosap.ntl.bts.gov/view/dot/92835
Jimenez, A., & Chialvo, S. (2026). Thermal Protection System Evaluation for Hazardous Materials Car Tanks (Report No. DOT/FRA/ORD-26/11). United States. Department of Transportation. Federal Railroad Administration. https://rosap.ntl.bts.gov/view/dot/92835

Jimenez, Alejandro and Sebastian Chialvo. Thermal Protection System Evaluation for Hazardous Materials Car Tanks. Report no. DOT/FRA/ORD-26/11. United States. Department of Transportation. Federal Railroad Administration, 2026. https://rosap.ntl.bts.gov/view/dot/92835.

Jimenez, Alejandro, and Sebastian Chialvo Thermal Protection System Evaluation for Hazardous Materials Car Tanks. United States. Department of Transportation. Federal Railroad Administration, 2026, Report no. DOT/FRA/ORD-26/11, ROSA P. https://rosap.ntl.bts.gov/view/dot/92835.
Export RIS Citation Information. TY - Tech Report AU - Jimenez, Alejandro AU - Chialvo, Sebastian A2 - Engineering Systems Inc A3 - United States. Department of Transportation. Federal Railroad Administration A4 - Won, Brian AB - The Federal Railroad Administration sponsored a research team from Engineering Services, Inc. to perform an analysis of the effectiveness of the thermal protection system on a DOT-117 rail car as a fire protection measure. This research was carried out between February 2022 and March 2023 at multiple ESi locations; the experimental tests were performed at ESi's Houston, Texas office. The objective of this work was to evaluate the performance of the thermal protection system in rail cars as a risk mitigation control to prevent a catastrophic thermal event. The research group also analyzed the heat transfer from a fire to rail car contents to understand the effectiveness of a potential fire response from a local fire department. AN - dot:92835 DA - 2026-07-30 ET - Final Report KW - Fire KW - Hazards KW - Emergency management KW - Hazardous materials KW - Tank cars KW - Ethanol KW - BLEVE KW - DOT-117 LA - English PB - United States. Department of Transportation. Federal Railroad Administration PY - 2026 SN - DOT/FRA/ORD-26/11 TI - Thermal Protection System Evaluation for Hazardous Materials Car Tanks M3 - Tech Report N1 - United States N1 - 693JJ621C000026 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92835 ER -
Autogas in General Aviation Aircraft

Byrnes, H. Stewart ;

Cavage, William C.

1987-04-01 | PDF

A series of aircraft engine tests were conducted on a dynamometer which compared the vapor lock tendency of selected automobile gasolines against aviation gasoline. The effects of fuel temperature, toe technique for heating the fuel used in vapor lock studies, the engine cooling air temperature the fuel level in the tanks, and fuel system configura ...

08/10/2026

Title : Autogas in General Aviation Aircraft Creator(s) : Byrnes, H. Stewart;Cavage, William C.;Ferrara, Augusto; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1987-04-01 Report Number : DOTIFAA/CT-87/05 URL : https://rosap.ntl.bts.gov/view/dot/92834
Byrnes, H. S., Cavage, W. C., & Ferrara, A. (1987). Autogas in General Aviation Aircraft (Report No. DOTIFAA/CT-87/05). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/92834

Byrnes, H. Stewart, William C. Cavage, and Augusto Ferrara. Autogas in General Aviation Aircraft. Report no. DOTIFAA/CT-87/05. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1987. https://rosap.ntl.bts.gov/view/dot/92834.

Byrnes, H. Stewart, et al. Autogas in General Aviation Aircraft. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1987, Report no. DOTIFAA/CT-87/05, ROSA P. https://rosap.ntl.bts.gov/view/dot/92834.
Export RIS Citation Information. TY - Tech Report AU - Byrnes, H. Stewart AU - Cavage, William C. AU - Ferrara, Augusto A2 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - A series of aircraft engine tests were conducted on a dynamometer which compared the vapor lock tendency of selected automobile gasolines against aviation gasoline. The effects of fuel temperature, toe technique for heating the fuel used in vapor lock studies, the engine cooling air temperature the fuel level in the tanks, and fuel system configuration were investigated. The tendency for automobile gasoline to detonate in an aircraft engine was investigated, and the results show a strong correlation with the Motor Octane Number. AN - dot:92834 DA - 1987-04-01 ET - Final Report KW - Airplanes KW - Fuel systems KW - Fuels KW - Private aircraft LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1987 SN - DOTIFAA/CT-87/05 TI - Autogas in General Aviation Aircraft M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92834 ER -
Proceedings and Minutes of the National Interagency Coordination Group Meeting - National Atmospheric Electricity Hazards Protection Plan for Aircraft

Glynn, Michael S.

1986-02-11 | PDF

This publication is a composite of the minutes and presentations given at the annual National Interagency Coordination Group on Lightning and Static Electricity meeting held in Atlantic City, New Jersey, on February 11-12, 1986. Mr. Michael S. Glynn of the Federal Aviation Administration Technical Center, Atlantic City Airport, New Jersey, was the ...

08/10/2026

Title : Proceedings and Minutes of the National Interagency Coordination Group Meeting - National Atmospheric Electricity Hazards Protection Plan for Aircraft Creator(s) : Glynn, Michael S. Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1986-02-11 Report Number : DOT/FAA/CT-86/340-1, DOT/FAA/CT-ACD 34086-01 URL : https://rosap.ntl.bts.gov/view/dot/92833
Glynn, M. S. (1986). Proceedings and Minutes of the National Interagency Coordination Group Meeting - National Atmospheric Electricity Hazards Protection Plan for Aircraft (Report No. DOT/FAA/CT-86/340-1, DOT/FAA/CT-ACD 34086-01). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/92833

Glynn, Michael S.. Proceedings and Minutes of the National Interagency Coordination Group Meeting - National Atmospheric Electricity Hazards Protection Plan for Aircraft. Report no. DOT/FAA/CT-86/340-1, DOT/FAA/CT-ACD 34086-01. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1986. https://rosap.ntl.bts.gov/view/dot/92833.

Glynn, Michael S. Proceedings and Minutes of the National Interagency Coordination Group Meeting - National Atmospheric Electricity Hazards Protection Plan for Aircraft. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1986, Report no. DOT/FAA/CT-86/340-1, DOT/FAA/CT-ACD 34086-01, ROSA P. https://rosap.ntl.bts.gov/view/dot/92833.
Export RIS Citation Information. TY - Proceedings AU - Glynn, Michael S. A2 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - This publication is a composite of the minutes and presentations given at the annual National Interagency Coordination Group on Lightning and Static Electricity meeting held in Atlantic City, New Jersey, on February 11-12, 1986. Mr. Michael S. Glynn of the Federal Aviation Administration Technical Center, Atlantic City Airport, New Jersey, was the host. AN - dot:92833 DA - 1986-02-11 ET - Final KW - Aircraft KW - Atmospheric phenomena KW - Lighting KW - Thunderstorms LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1986 SN - DOT/FAA/CT-86/340-1, DOT/FAA/CT-ACD 34086-01 TI - Proceedings and Minutes of the National Interagency Coordination Group Meeting - National Atmospheric Electricity Hazards Protection Plan for Aircraft M3 - Proceedings N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92833 ER -
Digital System Bus Integrity

Eldredge, Donald ;

Hitt, Ellis F.

1987-03-01 | PDF

This report summarizes and describes the results of a study of current or emerging multiplex data buses as applicable to digital flight systems, particularly with regard to civil aircraft. Technology for pre-1995 and post-1995 timeframes has been delineated and critiqued relative to the requirements then envisioned. The primary emphasis has been on ...

08/10/2026

Title : Digital System Bus Integrity Creator(s) : Eldredge, Donald;Hitt, Ellis F.; Corporate Creator(s) : Battelle Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1987-03-01 Report Number : DOT/FAA/CT-86/44 URL : https://rosap.ntl.bts.gov/view/dot/92832
Eldredge, D., & Hitt, E. F. (1987). Digital System Bus Integrity (Report No. DOT/FAA/CT-86/44). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/92832

Eldredge, Donald and Ellis F. Hitt. Digital System Bus Integrity. Report no. DOT/FAA/CT-86/44. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1987. https://rosap.ntl.bts.gov/view/dot/92832.

Eldredge, Donald, and Ellis F. Hitt Digital System Bus Integrity. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1987, Report no. DOT/FAA/CT-86/44, ROSA P. https://rosap.ntl.bts.gov/view/dot/92832.
Export RIS Citation Information. TY - Tech Report AU - Eldredge, Donald AU - Hitt, Ellis F. A2 - Battelle A3 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - This report summarizes and describes the results of a study of current or emerging multiplex data buses as applicable to digital flight systems, particularly with regard to civil aircraft. Technology for pre-1995 and post-1995 timeframes has been delineated and critiqued relative to the requirements then envisioned. The primary emphasis has been on assured airworthiness of the more prevalent type buses, with attention to attributes such as fault tolerance, environmental susceptibility, and problems under continuing investigation. Additionally, the capacity to certificate systems relying on such buses has been addressed. Keywords include: Avionics, Bus architecture, Bus topology, Digital flight systems, Fault tolerance, MUX buses, Networks, Protocols, Requirements, and System integration. AN - dot:92832 DA - 1987-03-01 KW - Aeronautics KW - Air traffic control KW - Electronic equipment KW - Electronics LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1987 SN - DOT/FAA/CT-86/44 TI - Digital System Bus Integrity M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92832 ER -
Migratory Bird Treaty Act Compliance: Noise and Vibration of Standard Bridge Maintenance Activity Pilot Project

Goffinet, Neal ;

Keefe, Tamara

2018-08-01 | PDF

This research report used a pilot project to examine the Migratory Bird Treaty Act (MBTA) and how Colorado Department of Transportation (CDOT) transportation improvement projects may result in noise and vibration levels that could affect migratory birds. The pilot project examined the vibration and noise levels that occurred as a result of standard ...

08/10/2026

Title : Migratory Bird Treaty Act Compliance: Noise and Vibration of Standard Bridge Maintenance Activity Pilot Project Creator(s) : Goffinet, Neal;Keefe, Tamara; Corporate Creator(s) : Felsburg Holt & Ullevig Corporate Contributor(s) : Colorado Department of Transportation. Office of Applied Research;United States. Department of Transportation. Federal Highway Administration; Published Date : 2018-08-01 Report Number : CDOT-2018-17 URL : https://rosap.ntl.bts.gov/view/dot/92831
Goffinet, N., & Keefe, T. (2018). Migratory Bird Treaty Act Compliance: Noise and Vibration of Standard Bridge Maintenance Activity Pilot Project (Report No. CDOT-2018-17). Colorado Department of Transportation. Applied Research & Innovations Branch. https://rosap.ntl.bts.gov/view/dot/92831

Goffinet, Neal and Tamara Keefe. Migratory Bird Treaty Act Compliance: Noise and Vibration of Standard Bridge Maintenance Activity Pilot Project. Report no. CDOT-2018-17. Colorado Department of Transportation. Applied Research & Innovations Branch, 2018. https://rosap.ntl.bts.gov/view/dot/92831.

Goffinet, Neal, and Tamara Keefe Migratory Bird Treaty Act Compliance: Noise and Vibration of Standard Bridge Maintenance Activity Pilot Project. Colorado Department of Transportation. Applied Research & Innovations Branch, 2018, Report no. CDOT-2018-17, ROSA P. https://rosap.ntl.bts.gov/view/dot/92831.
Export RIS Citation Information. TY - Tech Report AU - Goffinet, Neal AU - Keefe, Tamara A2 - Felsburg Holt & Ullevig A3 - Colorado Department of Transportation. Office of Applied Research A3 - United States. Department of Transportation. Federal Highway Administration AB - This research report used a pilot project to examine the Migratory Bird Treaty Act (MBTA) and how Colorado Department of Transportation (CDOT) transportation improvement projects may result in noise and vibration levels that could affect migratory birds. The pilot project examined the vibration and noise levels that occurred as a result of standard maintenance activities on structure E-16-P along Sheridan Boulevard over Clear Creek. Noise and vibration data collected between September 14, 2017 and November 25, 2017 showed distinct spikes in vibration on the bridge during expansion device demolition and bridge deck repair. There was a prolonged spike in vibration frequency during milling on the bridge. Due to limitations in the data of the study, it is unknown whether the peak levels of vibration and noise measurements would negatively impact migratory birds nesting on the structure. This pilot project helps inform CDOT or other agencies how to investigate the subject in more depth in the future. AB - Implementation: The results of this pilot study demonstrate that noise and vibration impacts from construction activities can be studied using methodology similar to that carried out here, but a larger sample of bridge types and construction activities will better inform decisions. The compiled data from this pilot project and additional studies can be used to determine whether certain bridge maintenance activities will be exempt from MBTA regulations due to minimal levels of disturbance to nesting birds. AN - dot:92831 DA - 2018-08-01 ET - Final Report KW - Migration KW - Noise KW - Vibration KW - Maintenance KW - Bridges KW - Bridge management systems KW - Birds KW - Pilot studies KW - Data collection KW - Treaties KW - Migratory Bird Treaty Act KW - migratory birds LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2018 SN - CDOT-2018-17 TI - Migratory Bird Treaty Act Compliance: Noise and Vibration of Standard Bridge Maintenance Activity Pilot Project M3 - Tech Report N1 - United States N1 - CDOT 114.04 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92831 ER -
Statistics on Aircraft Gas Turbine Engine Rotor Failures that Occurred in U.S. Commercial Aviation During 1981

DeLucia, R. A. ;

Salvino, J. T.

1987-03-01 | PDF

This report presents statistical information relating to gas turbine engine rotor failures which occurred during 1981 in commercial aviation service use. The predominant failure involved blade fragments, 83 percent of which were contained. Three disk failures occurred and all were uncontained. Fifty-seven percent of the 136 failures occurred during ...

08/10/2026

Title : Statistics on Aircraft Gas Turbine Engine Rotor Failures that Occurred in U.S. Commercial Aviation During 1981 Creator(s) : DeLucia, R. A.;Salvino, J. T.;Russo, T.; Corporate Creator(s) : Naval Air Propulsion Center Corporate Contributor(s) : United States. Department of Transportation. Federal Aviation Administration. Technical Center Published Date : 1987-03-01 Report Number : DOT /FAA/CT -86/42 URL : https://rosap.ntl.bts.gov/view/dot/92830
DeLucia, R. A., Salvino, J. T., & Russo, T. (1987). Statistics on Aircraft Gas Turbine Engine Rotor Failures that Occurred in U.S. Commercial Aviation During 1981 (Report No. DOT /FAA/CT -86/42). United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center. https://rosap.ntl.bts.gov/view/dot/92830

DeLucia, R. A., J. T. Salvino, and T. Russo. Statistics on Aircraft Gas Turbine Engine Rotor Failures that Occurred in U.S. Commercial Aviation During 1981. Report no. DOT /FAA/CT -86/42. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1987. https://rosap.ntl.bts.gov/view/dot/92830.

DeLucia, R. A., et al. Statistics on Aircraft Gas Turbine Engine Rotor Failures that Occurred in U.S. Commercial Aviation During 1981. United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center, 1987, Report no. DOT /FAA/CT -86/42, ROSA P. https://rosap.ntl.bts.gov/view/dot/92830.
Export RIS Citation Information. TY - Tech Report AU - DeLucia, R. A. AU - Salvino, J. T. AU - Russo, T. A2 - Naval Air Propulsion Center A3 - United States. Department of Transportation. Federal Aviation Administration. Technical Center AB - This report presents statistical information relating to gas turbine engine rotor failures which occurred during 1981 in commercial aviation service use. The predominant failure involved blade fragments, 83 percent of which were contained. Three disk failures occurred and all were uncontained. Fifty-seven percent of the 136 failures occurred during the takeoff and climb stages of flight. This service data analysis is prepared on a calendar year basis and published yearly. The data is useful in support of flight safety analysis, proposed regulatory actions, certification standards and cost benefit analysis. Keywords: Air transportation, Aircraft hazards, Containment. AN - dot:92830 DA - 1987-03-01 ET - Final Report KW - Aeronautics KW - Aircraft KW - Airplanes KW - Crashes KW - Gas turbines KW - Turbine engines KW - Turboprop engines KW - Statistics LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1987 SN - DOT /FAA/CT -86/42 TI - Statistics on Aircraft Gas Turbine Engine Rotor Failures that Occurred in U.S. Commercial Aviation During 1981 M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92830 ER -
State Highway 9 Wildlife Crossings Monitoring - Year 3 Progress Report [December 2015 Through April 2018]

Kintsch, Julia ;

Cramer, Patricia

2019-04-01 | PDF

This research study evaluates the effectiveness of the mitigation infrastructure through the use of motion activated cameras and analyses of WVC carcass and accident data. The study maintained a total of 62 motion-triggered cameras at 40 locations in Year 3 to record animal movements and responses to the mitigation. Cameras were placed at crossing ...

08/10/2026

Title : State Highway 9 Wildlife Crossings Monitoring - Year 3 Progress Report [December 2015 Through April 2018] Creator(s) : Kintsch, Julia;Cramer, Patricia;Singer, Paige;Cowardin, Michelle;Phelan, Joy; Corporate Creator(s) : ECO Resolutions;Rocky Mountain Wild;Colorado Parks and Wildlife;Muley Fanatic Foundation;Rocky Mountain Elk Foundation;Woodcock Foundation; Corporate Contributor(s) : Colorado. Department of Transportation. Applied Research & Innovations Branch Published Date : 2019-04-01 URL : https://rosap.ntl.bts.gov/view/dot/92829
Kintsch, J., Cramer, P., Singer, P., Cowardin, M., & Phelan, J. (2019). State Highway 9 Wildlife Crossings Monitoring - Year 3 Progress Report [December 2015 Through April 2018]. Colorado Department of Transportation. Applied Research & Innovations Branch. https://rosap.ntl.bts.gov/view/dot/92829

Kintsch, Julia, Patricia Cramer, Paige Singer, Michelle Cowardin, and Joy Phelan. State Highway 9 Wildlife Crossings Monitoring - Year 3 Progress Report [December 2015 Through April 2018]. Colorado Department of Transportation. Applied Research & Innovations Branch, 2019. https://rosap.ntl.bts.gov/view/dot/92829.

Kintsch, Julia, et al. State Highway 9 Wildlife Crossings Monitoring - Year 3 Progress Report [December 2015 Through April 2018]. Colorado Department of Transportation. Applied Research & Innovations Branch, 2019, ROSA P. https://rosap.ntl.bts.gov/view/dot/92829.
Export RIS Citation Information. TY - Tech Report AU - Kintsch, Julia AU - Cramer, Patricia AU - Singer, Paige AU - Cowardin, Michelle AU - Phelan, Joy A2 - ECO Resolutions A2 - Rocky Mountain Wild A2 - Colorado Parks and Wildlife A2 - Muley Fanatic Foundation A2 - Rocky Mountain Elk Foundation A2 - Woodcock Foundation A3 - Colorado. Department of Transportation. Applied Research & Innovations Branch AB - This research study evaluates the effectiveness of the mitigation infrastructure through the use of motion activated cameras and analyses of WVC carcass and accident data. The study maintained a total of 62 motion-triggered cameras at 40 locations in Year 3 to record animal movements and responses to the mitigation. Cameras were placed at crossing structure entrances and in the nearby habitat, at wildlife guards, escape ramps, and the south fence end. This progress report focuses on post-construction monitoring from December 2015 through April 2018. AN - dot:92829 DA - 2019-04-01 KW - Wildlife crossings KW - Crashes KW - Traffic safety KW - Grade separations KW - Monitoring KW - Data collection KW - Road construction LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2019 TI - State Highway 9 Wildlife Crossings Monitoring - Year 3 Progress Report [December 2015 Through April 2018] M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92829 ER -
Understanding Aggressive Driving and Ways to Reduce It, Phase 2: Engaging Bystanders and Developing Effective Messages

Hanson, Bridget L.

;

Green, Kelly

2026-07-01 | PDF

Aggressive driving is a prevalent traffic safety concern that contributes to crash risk and undermines traffic safety culture. Building on Phase 1 work that defined aggressive driving and identified promising intervention points, this Phase 2 study examined two complementary strategies to reduce aggressive driving: supporting bystanders (i.e., spou ...

08/10/2026

Title : Understanding Aggressive Driving and Ways to Reduce It, Phase 2: Engaging Bystanders and Developing Effective Messages Creator(s) : Hanson, Bridget L.;Green, Kelly;MacFarlane, Jennifer;Charbonneau, Brooke Z.;Guajardo, Kaylee;Finley, Kari; Corporate Creator(s) : Montana State University (Bozeman, Mont.). Center for Health and Safety Culture Corporate Contributor(s) : Montana Department of Transportation. Research Programs;United States. Department of Transportation. Federal Highway Administration;California. Department of Transportation;Connecticut Department of Transportation;Georgia. Department of Transportation;Idaho Transportation Department;Illinois. Department of Transportation;Iowa. Department of Transportation;Kansas Department of Transportation;Kentucky. Dept. of Transportation;Louisiana Department of Transportation;Michigan Department of Transportation;Minnesota. Department of Transportation;Mississippi Department of Transportation;Nevada. Department of Transportation;Texas Department of Transportation;Utah Department of Transportation;Vermont. Agency of Transportation;Washington (State). Department of Transportation; Published Date : 2026-07-01 Report Number : FHWA/MT-26-002/8882-444-26 DOI : https://doi.org/10.21949/m4se-g893
Hanson, B. L., Green, K., MacFarlane, J., Charbonneau, B. Z., Guajardo, K., & Finley, K. (2026). Understanding Aggressive Driving and Ways to Reduce It, Phase 2: Engaging Bystanders and Developing Effective Messages (Report No. FHWA/MT-26-002/8882-444-26). Montana. Department of Transportation. https://doi.org/10.21949/m4se-g893

Hanson, Bridget L., Kelly Green, Jennifer MacFarlane, Brooke Z. Charbonneau, Kaylee Guajardo, and Kari Finley. Understanding Aggressive Driving and Ways to Reduce It, Phase 2: Engaging Bystanders and Developing Effective Messages. Report no. FHWA/MT-26-002/8882-444-26. Montana. Department of Transportation, 2026. https://doi.org/10.21949/m4se-g893.

Hanson, Bridget L., et al. Understanding Aggressive Driving and Ways to Reduce It, Phase 2: Engaging Bystanders and Developing Effective Messages. Montana. Department of Transportation, 2026, Report no. FHWA/MT-26-002/8882-444-26, ROSA P. https://doi.org/10.21949/m4se-g893.
Export RIS Citation Information. TY - Tech Report AU - Hanson, Bridget L. AU - Green, Kelly AU - MacFarlane, Jennifer AU - Charbonneau, Brooke Z. AU - Guajardo, Kaylee AU - Finley, Kari A2 - Montana State University (Bozeman, Mont.). Center for Health and Safety Culture A3 - Montana Department of Transportation. Research Programs A3 - United States. Department of Transportation. Federal Highway Administration A3 - California. Department of Transportation A3 - Connecticut Department of Transportation A3 - Georgia. Department of Transportation A3 - Idaho Transportation Department A3 - Illinois. Department of Transportation A3 - Iowa. Department of Transportation A3 - Kansas Department of Transportation A3 - Kentucky. Dept. of Transportation A3 - Louisiana Department of Transportation A3 - Michigan Department of Transportation A3 - Minnesota. Department of Transportation A3 - Mississippi Department of Transportation A3 - Nevada. Department of Transportation A3 - Texas Department of Transportation A3 - Utah Department of Transportation A3 - Vermont. Agency of Transportation A3 - Washington (State). Department of Transportation AB - Aggressive driving is a prevalent traffic safety concern that contributes to crash risk and undermines traffic safety culture. Building on Phase 1 work that defined aggressive driving and identified promising intervention points, this Phase 2 study examined two complementary strategies to reduce aggressive driving: supporting bystanders (i.e., spouses/partners, family members, and close friends) to intervene with drivers who engage in aggressive driving, and developing and testing media messages to encourage safer driving among drivers themselves. Key informant interviews were conducted with bystanders. Findings informed the development of a three-step bystander intervention that included expressing concern and connecting to shared values. The intervention was tested with a national sample of 102 bystanders. Results demonstrated increased bystander confidence, greater use of constructive strategies, and perceived reductions in aggressive driving frequency. Participants reported that the strategies were feasible, acceptable, and helpful. Media messages were developed in three main themes: cognitive reappraisal, adaptive response, and prosocial driving. Messages were tested with 864 drivers who reported recent engagement in aggressive driving. Findings indicated that, across message themes, messages were well received, prompted reflection on driving behavior, and supported changes in perceptions related to safety and responsibility. Together, these findings suggest that engaging bystanders and deploying supportive, nonjudgmental messaging are promising, complementary approaches to reducing aggressive driving and strengthening traffic safety culture. Resources were developed: a bystander conversation guide, a community dissemination toolkit, and a messaging development resource. AN - dot:92828 DA - 2026-07-01 DO - https://doi.org/10.21949/m4se-g893 ET - Final Report (May 2024 - July 2026) KW - Driving behavior KW - Messages KW - Communication KW - Traffic safety KW - Strategic planning KW - Information dissemination KW - Crash risk forecasting KW - Risk assessment KW - Literature reviews KW - aggressive driving KW - bystander KW - traffic safety culture LA - English PB - Montana. Department of Transportation PY - 2026 SN - FHWA/MT-26-002/8882-444-26 TI - Understanding Aggressive Driving and Ways to Reduce It, Phase 2: Engaging Bystanders and Developing Effective Messages M3 - Tech Report N1 - United States N1 - 8882-444-26 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92828 ER -
Navigating Possibilities: Unlocking Tennessee's Waterways for Interstate Freight Transportation

Maier, Donald ;

Trombly, Jeffrey

2026-02-01 | PDF

The study evaluated the inland waterways and port facilities of the State and analyzed their potential for transportation services as part of the overall State Transportation plan. The focus of the study evaluated the current flows and costs of cargo movement and commodity class; the path related to origin and destination; the viability of potentia ...

08/10/2026

Title : Navigating Possibilities: Unlocking Tennessee's Waterways for Interstate Freight Transportation Creator(s) : Maier, Donald;Trombly, Jeffrey;Balthrop, Andrew;Bolumole, Yemisi;Golias, Mihalis;Arnold, David; Corporate Creator(s) : University of Tennessee, Knoxville Corporate Contributor(s) : Tennessee. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-02-01 Report Number : RES2025-06 URL : https://rosap.ntl.bts.gov/view/dot/92827
Maier, D., Trombly, J., Balthrop, A., Bolumole, Y., Golias, M., & Arnold, D. (2026). Navigating Possibilities: Unlocking Tennessee's Waterways for Interstate Freight Transportation (Report No. RES2025-06). Tennessee. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/92827

Maier, Donald, Jeffrey Trombly, Andrew Balthrop, Yemisi Bolumole, Mihalis Golias, and David Arnold. Navigating Possibilities: Unlocking Tennessee's Waterways for Interstate Freight Transportation. Report no. RES2025-06. Tennessee. Department of Transportation, 2026. https://rosap.ntl.bts.gov/view/dot/92827.

Maier, Donald, et al. Navigating Possibilities: Unlocking Tennessee's Waterways for Interstate Freight Transportation. Tennessee. Department of Transportation, 2026, Report no. RES2025-06, ROSA P. https://rosap.ntl.bts.gov/view/dot/92827.
Export RIS Citation Information. TY - Tech Report AU - Maier, Donald AU - Trombly, Jeffrey AU - Balthrop, Andrew AU - Bolumole, Yemisi AU - Golias, Mihalis AU - Arnold, David A2 - University of Tennessee, Knoxville A3 - Tennessee. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The study evaluated the inland waterways and port facilities of the State and analyzed their potential for transportation services as part of the overall State Transportation plan. The focus of the study evaluated the current flows and costs of cargo movement and commodity class; the path related to origin and destination; the viability of potential port assets that could be utilized; the effectiveness of optimizing current State infrastructure and connecting waterways for enhancing the transportation network. By leveraging its inland waterways and investing in transportation infrastructure, Tennessee can enhance its competitiveness, promote sustainable development, and build a more resilient and prosperous future. Tennessee's geographical location creates both challenges and opportunities as a strategic multi-modal hub for national commerce. By developing its waterways for freight transportation, the state can capitalize on its central location to facilitate the movement of goods well beyond the state which would serve to attract businesses seeking efficient transportation routes, expand market access for Tennessee-based industries, as well as connect other industries to Tennessee. AN - dot:92827 DA - 2026-02-01 KW - Inland waterways KW - Multimodal transportation KW - Freight transportation KW - Port operations KW - Interstate transportation KW - Cargo handling KW - Infrastructure KW - multi-modal operations KW - port governance LA - English PB - Tennessee. Department of Transportation PY - 2026 SN - RES2025-06 TI - Navigating Possibilities: Unlocking Tennessee's Waterways for Interstate Freight Transportation M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92827 ER -
Benchmarking Study of TDOT D Mixtures for Balanced Mix Design

Huang, Baoshan ;

Zhang, Jingyue

2026-07-01 | PDF

This study supported the Tennessee Department of Transportation's implementation of Balanced Mix Design (BMD) for TDOT 411-D dense-graded surface mixtures by developing local benchmarking data, evaluating aging procedures, comparing 6-inch Superpave gyratory-compacted and 4-inch Marshall-compacted specimens, and recommending preliminary performance ...

08/10/2026

Title : Benchmarking Study of TDOT D Mixtures for Balanced Mix Design Creator(s) : Huang, Baoshan;Zhang, Jingyue;Huang, Kai; 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 : 2026-07-01 Report Number : RES2024-07 URL : https://rosap.ntl.bts.gov/view/dot/92825
Huang, B., Zhang, J., & Huang, K. (2026). Benchmarking Study of TDOT D Mixtures for Balanced Mix Design (Report No. RES2024-07). Tennessee. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/92825

Huang, Baoshan, Jingyue Zhang, and Kai Huang. Benchmarking Study of TDOT D Mixtures for Balanced Mix Design. Report no. RES2024-07. Tennessee. Department of Transportation, 2026. https://rosap.ntl.bts.gov/view/dot/92825.

Huang, Baoshan, et al. Benchmarking Study of TDOT D Mixtures for Balanced Mix Design. Tennessee. Department of Transportation, 2026, Report no. RES2024-07, ROSA P. https://rosap.ntl.bts.gov/view/dot/92825.
Export RIS Citation Information. TY - Tech Report AU - Huang, Baoshan AU - Zhang, Jingyue AU - Huang, Kai 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 - This study supported the Tennessee Department of Transportation's implementation of Balanced Mix Design (BMD) for TDOT 411-D dense-graded surface mixtures by developing local benchmarking data, evaluating aging procedures, comparing 6-inch Superpave gyratory-compacted and 4-inch Marshall-compacted specimens, and recommending preliminary performance thresholds. Twenty-four approved Tennessee mixtures were evaluated as plant-mixed, laboratory-compacted (PMLC) and laboratory-mixed, laboratory-compacted (LMLC) specimens using the IDEAL-CT, Tennessee Cracking Test (TN-CT), IDEAL-RT, high-temperature indirect tensile strength (HT-IDT), and Hamburg Wheel Tracking Test (HWTT). Five long-term aging protocols were assessed for aging severity and practical feasibility. Loose-mixture aging at 115°C for 20 hours was recommended because it successfully simulated long term aging effects while avoiding excessive conditioning time and overly high aging temperature and could be completed within a routine laboratory work schedule. An equivalent-aging-time framework was developed to integrate aging temperature and duration into a single aging severity parameter. Benchmarking results showed different performance distributions for PMLC and LMLC specimens, indicating that separate thresholds should be established for mixture design and production quality control. TN-CT correlated reasonably with IDEAL-CT, indicating that TN-CT can be used as a Marshall-compatible cracking evaluation test. In contrast, correlations among the results obtained using different rutting test protocols were relatively weak. Therefore, HT-IDT may serve as a Marshall-compatible rutting test but is not recommended as a replacement for HWTT at this stage. Preliminary thresholds were proposed for TDOT BMD implementation and should be refined as BMD implementation progresses and additional field performance data become available for verification. AN - dot:92825 DA - 2026-07-01 ET - Final report, August 1,2023-July 31,2026 KW - Mix design KW - Benchmarks KW - Performance tests KW - Asphalt mixtures KW - Evaluation KW - Cracking KW - Balanced Mix Design LA - English PB - Tennessee. Department of Transportation PY - 2026 SN - RES2024-07 TI - Benchmarking Study of TDOT D Mixtures for Balanced Mix Design M3 - Tech Report N1 - United States N1 - RES2024-07 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92825 ER -
Applying Induced Travel Study in Urban Areas in Tennessee

Antipova, Angela ;

Mishra, Sabya

2026-07-01 | PDF

There is a need to understand how transportation provision affects changes in travel including induced travel. Studies are especially needed in places where the increase in travel is substantial. Current research on induced travel in Tennessee has been largely lacking. Prior studies have often used the instrumental approach to isolate the effect of ...

08/10/2026

Title : Applying Induced Travel Study in Urban Areas in Tennessee Creator(s) : Antipova, Angela;Mishra, Sabya;Agrawal, Aman;Biswas, Jayanta; Corporate Creator(s) : University of Memphis. Center for Applied Earth Science and Engineering Research Corporate Contributor(s) : Tennessee. Department of Transportation;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-07-01 Report Number : RES2024-02 URL : https://rosap.ntl.bts.gov/view/dot/92824
Antipova, A., Mishra, S., Agrawal, A., & Biswas, J. (2026). Applying Induced Travel Study in Urban Areas in Tennessee (Report No. RES2024-02). Tennessee. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/92824

Antipova, Angela, Sabya Mishra, Aman Agrawal, and Jayanta Biswas. Applying Induced Travel Study in Urban Areas in Tennessee. Report no. RES2024-02. Tennessee. Department of Transportation, 2026. https://rosap.ntl.bts.gov/view/dot/92824.

Antipova, Angela, et al. Applying Induced Travel Study in Urban Areas in Tennessee. Tennessee. Department of Transportation, 2026, Report no. RES2024-02, ROSA P. https://rosap.ntl.bts.gov/view/dot/92824.
Export RIS Citation Information. TY - Tech Report AU - Antipova, Angela AU - Mishra, Sabya AU - Agrawal, Aman AU - Biswas, Jayanta A2 - University of Memphis. Center for Applied Earth Science and Engineering Research A3 - Tennessee. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - There is a need to understand how transportation provision affects changes in travel including induced travel. Studies are especially needed in places where the increase in travel is substantial. Current research on induced travel in Tennessee has been largely lacking. Prior studies have often used the instrumental approach to isolate the effect of capacity enhancement on travel at the area-wide scale, thus, potentially masking the effect of additional capacity on a single road where improvements have been implemented. This project fills the identified research gaps. This study searches for and identifies instrumental variables at a disaggregate level to further examine the impact of changes in the transportation system on travel. This project operated at the level of individual facilities that experienced capacity enhancement such as road widening or constructing a new lane. The research conducted in this project has led to (1) obtaining local-based evidence of changes in travel after capacity enhancement implementation, (2) identifying drivers of induced travel, and (3) estimating the impact of adding road capacity on travel measured with vehicle miles traveled (VMT) via an instrumental variable (IV) approach at the facility level in Tennessee. Thus, transportation impact analyses will help planning agencies to better understand travel patterns and local transportation impacts of road capacity expansion in metro areas in Tennessee, assist with informed policy decision making, and develop regional and state transportation plans for regional and local transportation projects. The TDOT can use this research as evidence-based estimates of travel changes in response to adding road capacity. The TDOT and regional agencies will have a better understanding of impacts of induced travel from the road capacity expansion projects and to improve performance, environmental sustainability, and direct capital investment for transportation in Tennessee. AN - dot:92824 DA - 2026-07-01 KW - Travel behavior KW - Urban areas KW - Variables KW - Statistical analysis KW - Data analysis KW - Vehicle miles of travel KW - Capital investments KW - Induced Travel KW - Capacity Enhancement KW - Instrumental Variables LA - English PB - Tennessee. Department of Transportation PY - 2026 SN - RES2024-02 TI - Applying Induced Travel Study in Urban Areas in Tennessee M3 - Tech Report N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92824 ER -
Development of New Corrosion/Abrasion Guidelines for Selection of Culvert Pipe Materials

Molinas, Albert ;

Mommandi, Amanullah

2009-11-01 | PDF

In this research effort, literature surveys and reviews of the current methodologies employed by various state DOTs were conducted. The literature survey identified the pertinent parameters in estimating the service life of various pipe materials. Following the literature survey, field visits to culvert sites were made to collect data. Selection of ...

08/10/2026

Title : Development of New Corrosion/Abrasion Guidelines for Selection of Culvert Pipe Materials Creator(s) : Molinas, Albert;Mommandi, Amanullah; Corporate Creator(s) : Colorado State University Corporate Contributor(s) : Colorado Department of Transportation. Office of Applied Research;United States. Department of Transportation. Federal Highway Administration; Published Date : 2009-11-01 Report Number : CDOT-2009-11 URL : https://rosap.ntl.bts.gov/view/dot/92822
Molinas, A., & Mommandi, A. (2009). Development of New Corrosion/Abrasion Guidelines for Selection of Culvert Pipe Materials (Report No. CDOT-2009-11). Colorado Department of Transportation. Applied Research & Innovations Branch. https://rosap.ntl.bts.gov/view/dot/92822

Molinas, Albert and Amanullah Mommandi. Development of New Corrosion/Abrasion Guidelines for Selection of Culvert Pipe Materials. Report no. CDOT-2009-11. Colorado Department of Transportation. Applied Research & Innovations Branch, 2009. https://rosap.ntl.bts.gov/view/dot/92822.

Molinas, Albert, and Amanullah Mommandi Development of New Corrosion/Abrasion Guidelines for Selection of Culvert Pipe Materials. Colorado Department of Transportation. Applied Research & Innovations Branch, 2009, Report no. CDOT-2009-11, ROSA P. https://rosap.ntl.bts.gov/view/dot/92822.
Export RIS Citation Information. TY - Tech Report AU - Molinas, Albert AU - Mommandi, Amanullah A2 - Colorado State University A3 - Colorado Department of Transportation. Office of Applied Research A3 - United States. Department of Transportation. Federal Highway Administration AB - In this research effort, literature surveys and reviews of the current methodologies employed by various state DOTs were conducted. The literature survey identified the pertinent parameters in estimating the service life of various pipe materials. Following the literature survey, field visits to culvert sites were made to collect data. Selection of culvert sites was jointly made by engineers from Staff Bridge, Staff Hydraulics, and members of the study panel. Field surveying of 21 sites where failed pipe installations were observed was conducted in Colorado along I-70, I-25, and SH 58 to obtain a good cross-section of soil type samples. At these sites, soil and water samples were obtained and soil resistivities were determined using applicable Colorado Procedures, AASHTO test methods, or ASTM test methods. Soil and water samples from these sites were analyzed for sulfate/chloride level concentrations, and pH levels. Relevant culvert inspection data from Staff Bridge inspection programs was obtained and used in the analysis where needed. Data collected from literature searches, the Staff Bridge database, actual field surveys, and other unbiased reliable sources was analyzed. The service life was correlated with various parameters including type of material, pH level, chloride and sulfate level concentrations, specific resistivity, abrasion data (steep pipe slopes, high sediment loads, high flow velocity in pipes, etc.) and other factors that could have influenced premature deterioration or failures. A new service life chart for steel pipes was developed based on the information collected from the field observations and data analysis. Data from Colorado pipe failure cases was used in relating service life of pipes to soil resistivity. Pipe failure criteria were established in accordance with the ongoing culvert evaluation procedure along I-70 and I-25. For the steel pipe failure cases along I70 and I-25, the previously published service life predictors for steel pipes deviated from observations by as much as 10 times. Service life multipliers to account for steel pipe thickness effects had been greatly exaggerated. For aluminum pipes, the research identified chloride and sulfate concentrations as factors that reduced the service life of these pipes dramatically. AN - dot:92822 DA - 2009-11-01 ET - Final Report KW - Culverts KW - Materials selection KW - Service life KW - Metal pipe KW - Aluminum KW - Hydrology KW - Chlorides KW - Sulfates KW - Soils KW - Resistivity method KW - Literature reviews KW - Surveys KW - Data collection KW - Guidelines KW - steel pipes KW - concrete pipes KW - aluminum pipes KW - soil resistivity LA - English PB - Colorado Department of Transportation. Applied Research & Innovations Branch PY - 2009 SN - CDOT-2009-11 TI - Development of New Corrosion/Abrasion Guidelines for Selection of Culvert Pipe Materials M3 - Tech Report N1 - United States N1 - 106.00 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92822 ER -
Analysis of the Effectiveness of Construction Management Plans

Caldas, Carlos

;

Han, Zhe

2026-04-01 | PDF

This study aimed to assess the effectiveness of Construction Management Plans (CMPs). To achieve this goal, data from TxDOT highway projects was collected and analyzed. The analyses employed descriptive statistics, correlation analysis, hypothesis testing, and exploratory factor analysis to identify significant relationships between project charact ...

08/10/2026

Supporting Files

Title : Analysis of the Effectiveness of Construction Management Plans Creator(s) : Caldas, Carlos;Han, Zhe;Sun, Jingran;Rausch, Christopher;Kim, Chaeyoung; Corporate Creator(s) : University of Texas at Austin. Center for Transportation Research Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2026-04-01 Report Number : FHWA/TX-26/0-7182-1 URL : https://rosap.ntl.bts.gov/view/dot/92821
Caldas, C., Han, Z., Sun, J., Rausch, C., & Kim, C. (2026). Analysis of the Effectiveness of Construction Management Plans (Report No. FHWA/TX-26/0-7182-1). University of Texas at Austin. Center for Transportation Research. https://rosap.ntl.bts.gov/view/dot/92821

Caldas, Carlos, Zhe Han, Jingran Sun, Christopher Rausch, and Chaeyoung Kim. Analysis of the Effectiveness of Construction Management Plans. Report no. FHWA/TX-26/0-7182-1. University of Texas at Austin. Center for Transportation Research, 2026. https://rosap.ntl.bts.gov/view/dot/92821.

Caldas, Carlos, et al. Analysis of the Effectiveness of Construction Management Plans. University of Texas at Austin. Center for Transportation Research, 2026, Report no. FHWA/TX-26/0-7182-1, ROSA P. https://rosap.ntl.bts.gov/view/dot/92821.
Export RIS Citation Information. TY - Tech Report AU - Caldas, Carlos AU - Han, Zhe AU - Sun, Jingran AU - Rausch, Christopher AU - Kim, Chaeyoung A2 - University of Texas at Austin. Center for Transportation Research A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - This study aimed to assess the effectiveness of Construction Management Plans (CMPs). To achieve this goal, data from TxDOT highway projects was collected and analyzed. The analyses employed descriptive statistics, correlation analysis, hypothesis testing, and exploratory factor analysis to identify significant relationships between project characteristics, CMP components, change orders, and project performance indicators. The results indicated that CMP projects are generally larger and more complex than non-CMP projects. CMPs were considered effective since the number of change orders and the project cost variation due to change orders was lower in the period after CMP implementation. Correlations between conflict clearance delays and change orders on CMP projects suggested opportunities for improvement and the need for more proactive conflict clearance management. These findings confirm that CMPs serve as an effective tool for project conflict management and provide data-driven insights for improving project delivery practices in TxDOT. AN - dot:92821 DA - 2026-04-01 ET - September 2023 - August 2025 KW - Construction management KW - Project management KW - Conflict management KW - Project delivery KW - Data collection KW - Analysis LA - English PB - University of Texas at Austin. Center for Transportation Research PY - 2026 SN - FHWA/TX-26/0-7182-1 TI - Analysis of the Effectiveness of Construction Management Plans M3 - Tech Report N1 - United States N1 - 0-7182 DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92821 ER -
Determine Effectiveness of Construction Management Plans (CMPs) [Project Summary Report]

Caldas, Carlos

;

Han, Zhe

2025-08-31 | PDF

The study began with a detailed review of CMP content and structure to identify standardized elements and key characteristics of CMP projects, including conflict categorization and quantification. Using the compiled data, the team analyzed trends in change orders before and after CMP implementation to assess their impact on project performance, par ...

08/10/2026

Title : Determine Effectiveness of Construction Management Plans (CMPs) [Project Summary Report] Creator(s) : Caldas, Carlos;Han, Zhe;Sun, Jingran;Rausch, Christopher;Kim, Chaeyoung; Corporate Creator(s) : University of Texas at Austin. Center for Transportation Research Corporate Contributor(s) : Texas Department of Transportation. Research and Technology Implementation Office;United States. Department of Transportation. Federal Highway Administration; Published Date : 2025-08-31 Report Number : 0-7182 URL : https://rosap.ntl.bts.gov/view/dot/92820
Caldas, C., Han, Z., Sun, J., Rausch, C., & Kim, C. (2025). Determine Effectiveness of Construction Management Plans (CMPs) [Project Summary Report] (Report No. 0-7182). University of Texas at Austin. Center for Transportation Research. https://rosap.ntl.bts.gov/view/dot/92820

Caldas, Carlos, Zhe Han, Jingran Sun, Christopher Rausch, and Chaeyoung Kim. Determine Effectiveness of Construction Management Plans (CMPs) [Project Summary Report]. Report no. 0-7182. University of Texas at Austin. Center for Transportation Research, 2025. https://rosap.ntl.bts.gov/view/dot/92820.

Caldas, Carlos, et al. Determine Effectiveness of Construction Management Plans (CMPs) [Project Summary Report]. University of Texas at Austin. Center for Transportation Research, 2025, Report no. 0-7182, ROSA P. https://rosap.ntl.bts.gov/view/dot/92820.
Export RIS Citation Information. TY - Brief AU - Caldas, Carlos AU - Han, Zhe AU - Sun, Jingran AU - Rausch, Christopher AU - Kim, Chaeyoung A2 - University of Texas at Austin. Center for Transportation Research A3 - Texas Department of Transportation. Research and Technology Implementation Office A3 - United States. Department of Transportation. Federal Highway Administration AB - The study began with a detailed review of CMP content and structure to identify standardized elements and key characteristics of CMP projects, including conflict categorization and quantification. Using the compiled data, the team analyzed trends in change orders before and after CMP implementation to assess their impact on project performance, particularly in terms of cost increases and time adjustments from change orders. Advanced statistical methods were then applied to examine correlations between CMP-related variables and change orders, along with other factors influencing project performance. Based on these findings, the research team developed practical, data-driven recommendations to enhance the preparation, review, and use of CMPs as a proactive tool for conflict clearance management. AN - dot:92820 DA - 2025-08-31 ET - Project Summary Report KW - Construction management KW - Measures of effectiveness KW - Road construction KW - Correlation analysis KW - Statistical analysis KW - Costs LA - English PB - University of Texas at Austin. Center for Transportation Research PY - 2025 SN - 0-7182 TI - Determine Effectiveness of Construction Management Plans (CMPs) [Project Summary Report] M3 - Brief N1 - United States DB - ROSA P UR - https://rosap.ntl.bts.gov/view/dot/92820 ER -

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