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Showing 621 - 640 of 929 results

Texas: Highway Safety Improvement Program 2017 Annual Report

Texas. Department of Highways and Public Transportation

2017-11-01 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

05/04/2026

Title : Texas: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Texas. Department of Highways and Public Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-11-01 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90492 Texas. Department of Highways and Public Transportation (2017). Texas: Highway Safety Improvement Program 2017 Annual Report. Texas. Department of Highways and Public Transportation "Texas: Highway Safety Improvement Program 2017 Annual Report" (2017) Texas. Department of Highways and Public Transportation "Texas: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Texas. Department of Highways and Public Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90492 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-11-01 T2 - Highway Safety Improvement Program Annual Reports TI - Texas: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90492 ER -
Tennessee: Highway Safety Improvement Program 2017 Annual Report

Tennessee. Department of Transportation

2017-11-01 | Highway Safety Improvement Program Annual Reports | PDF

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. ...

05/04/2026

Title : Tennessee: Highway Safety Improvement Program 2017 Annual Report Corporate Creator(s) : Tennessee. Department of Transportation Corporate Contributor(s) : United States. Department of Transportation. Federal Highway Administration Published Date : 2017-11-01 Series : Highway Safety Improvement Program Annual Reports URL : https://rosap.ntl.bts.gov/view/dot/90491 Tennessee. Department of Transportation (2017). Tennessee: Highway Safety Improvement Program 2017 Annual Report. Tennessee. Department of Transportation "Tennessee: Highway Safety Improvement Program 2017 Annual Report" (2017) Tennessee. Department of Transportation "Tennessee: Highway Safety Improvement Program 2017 Annual Report" , 2017 Export RIS Citation Information. TY - Tech Report A2 - Tennessee. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - The Highway Safety Improvement Program (HSIP) is a core Federal-aid program with the purpose of achieving a significant reduction in fatalities and serious injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are required to report annually on the progress being made to advance HSIP implementation and evaluation efforts. The format of this report is consistent with the HSIP Reporting Guidance dated December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the improvements and compliance assessment. AN - dot:90491 KW - Infrastructure KW - Investments KW - Federal laws KW - Financing KW - Highway safety LA - English PB - United States. Department of Transportation. Federal Highway Administration PY - 2017-11-01 T2 - Highway Safety Improvement Program Annual Reports TI - Tennessee: Highway Safety Improvement Program 2017 Annual Report M3 - Tech Report N1 - United States N1 - Public Domain UR - https://rosap.ntl.bts.gov/view/dot/90491 ER -
Caltrans Field Trials of the Intelligent Truck-Mounted Attenuator (ITMA)

Torick, Dave ;

Kumar, Dinesh

2026-01-30 | PDF

Truck-mounted attenuator (TMA) operators are exposed to traffic-related hazards during Caltrans maintenance operations. To help reduce this exposure, the Advanced Highway Maintenance and Construction Technology Research Center (AHMCT), in partnership with Caltrans, conducted controlled public-road field trials of the Intelligent Truck-Mounted Atten ...

05/04/2026

Title : Caltrans Field Trials of the Intelligent Truck-Mounted Attenuator (ITMA) Creator(s) : Torick, Dave;Kumar, Dinesh;Duong, Anh;Nazari, Shima; Corporate Creator(s) : Advanced Highway Maintenance and Construction Technology Research Center (Calif.) Corporate Contributor(s) : California. Department of Transportation Published Date : 2026-01-30 Report Number : CA26-4159;UCD-ARR-26-01-30-01; URL : https://rosap.ntl.bts.gov/view/dot/90490 Torick, Dave et al. (2026). Caltrans Field Trials of the Intelligent Truck-Mounted Attenuator (ITMA). Torick, Dave et al. "Caltrans Field Trials of the Intelligent Truck-Mounted Attenuator (ITMA)" (2026) Torick, Dave et al. "Caltrans Field Trials of the Intelligent Truck-Mounted Attenuator (ITMA)" , 2026 Export RIS Citation Information. TY - Tech Report AU - Torick, Dave AU - Kumar, Dinesh AU - Duong, Anh AU - Nazari, Shima A2 - Advanced Highway Maintenance and Construction Technology Research Center (Calif.) A3 - California. Department of Transportation AB - Truck-mounted attenuator (TMA) operators are exposed to traffic-related hazards during Caltrans maintenance operations. To help reduce this exposure, the Advanced Highway Maintenance and Construction Technology Research Center (AHMCT), in partnership with Caltrans, conducted controlled public-road field trials of the Intelligent Truck-Mounted Attenuator {ITMA). The ITMA is a two-vehicle system in which a leader vehicle guides a semi- or fully intelligent follower vehicle equipped with a TMA. Building on prior closed-course evaluations, this project prepared the system for field evaluation through hardware upgrades, communications improvements, interface enhancements, and operator training. The ITMA was evaluated during striping, sweeping, and raised pavement marker operations in both semi-intelligent and fully intelligent modes. Field trials demonstrated consistent following behavior, predictable emergency stopping, and stable performance in varied roadway and GPS-challenged environments. Operator feedback indicated positive acceptance and increasing familiarity with system operation. The results support the continued evaluation of the ITMA and inform future decisions regarding its potential operational use. AN - dot:90490 ET - Final Report: January 2023 - October 2025 KW - Intelligent transportation systems KW - Truck mounted attenuators KW - Work zone safety KW - Highway maintenance KW - Autonomous vehicles KW - Automatic headway control KW - Car following KW - Public roads KW - Global Positioning System KW - Navigation KW - Advanced traffic management systems KW - Field tests KW - Raised road markings KW - Evaluation KW - Intelligent Truck-Mounted Attenuator (ITMA) KW - autonomous maintenance vehicles KW - leader-follower vehicle systems KW - public-road field trials KW - GPS-denied navigation LA - English PB - California. Department of Transportation PY - 2026-01-30 SN - CA26-4159 TI - Caltrans Field Trials of the Intelligent Truck-Mounted Attenuator (ITMA) M3 - Tech Report N1 - United States N1 - 65A07 49 Task 41 UR - https://rosap.ntl.bts.gov/view/dot/90490 ER -
Case Studies Documenting Lessons Learned and Identifying Opportunities for Maintenance of Traffic (MOT) Improvements

Overall, Myles W.

;

Mukai, Justin

2025-10-28 | PDF

Over the past 18 months, the team has performed several dozen after-action reviews of interstate work zones and the associated maintenance of traffic (MOT). These after-action reports generally contain the following information: Date, location, visual images, connected vehicle summary graphics, qualitative discussion of activity, and in some cases ...

05/04/2026

Title : Case Studies Documenting Lessons Learned and Identifying Opportunities for Maintenance of Traffic (MOT) Improvements Creator(s) : Overall, Myles W.;Mukai, Justin;Sakhare, Rahul Suryakant;Desai, Jairaj;Horton, Deborah;Bullock, Darcy M.; 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 : 2025-10-28 Report Number : FHWA/IN/JTRP-2025/29 DOI : https://doi.org/10.5703/1288284318578 Overall, Myles W. et al. (2025). Case Studies Documenting Lessons Learned and Identifying Opportunities for Maintenance of Traffic (MOT) Improvements. https://doi.org/10.5703/1288284318578 Overall, Myles W. et al. "Case Studies Documenting Lessons Learned and Identifying Opportunities for Maintenance of Traffic (MOT) Improvements" (2025), https://doi.org/10.5703/1288284318578 Overall, Myles W. et al. "Case Studies Documenting Lessons Learned and Identifying Opportunities for Maintenance of Traffic (MOT) Improvements" , 2025, https://doi.org/10.5703/1288284318578 Export RIS Citation Information. TY - Tech Report AU - Overall, Myles W. AU - Mukai, Justin AU - Sakhare, Rahul Suryakant AU - Desai, Jairaj AU - Horton, Deborah AU - Bullock, Darcy M. A2 - Purdue University. Joint Transportation Research Program A3 - Indiana. Department of Transportation A3 - United States. Department of Transportation. Federal Highway Administration AB - Over the past 18 months, the team has performed several dozen after-action reviews of interstate work zones and the associated maintenance of traffic (MOT). These after-action reports generally contain the following information: Date, location, visual images, connected vehicle summary graphics, qualitative discussion of activity, and in some cases press releases or media posts. In general, these themes emerged: AB - 1.MOT plans in some cases do not accurately capture the geometry constraints placed by bridges, guardrail and or barrier wall. It is important that design reviews place careful focus on ensuring lane widths, shoulders, and shoulder treatments fit across the entire cross section of each phase or requests for design exceptions be initiated. In some cases, performing some type of LiDAR survey prior to design may assist MOT designers in effectively capturing more accurate location and dimensions of existing geometrics, particularly edge of pavement, edge of bridge, guardrails, and embankments. AB - 2.When lane shifts are initiated, the designers should examine the path of the vehicle at both the start and end of the transition. In some cases, the end of the transition occurs quite close to either a guardrail or narrow section of pavement. In some cases, either gentler transitions or additional horizontal clearance should be considered. AB - 3.There is relatively little dialog between the temporary traffic control contractors and designers on what are the best practices and requirements for implementing a change in MOT. AB - 4.To sustain this engagement between designers, and MOT contractors, it is recommended that selected projects include MOT review with design engineers, and contractor as part of the close out process to document lessons learned. AB - 5.Rolling slows downs have a role in MOT, but there appears to be inconsistent use of rolling slowdowns for short term closures. It is recommended that requirements for rolling slowdowns be identified in the MOT plans. If contractors are required to use rolling slowdowns not documented in MOT plans, they should be required to obtain approval from the Indiana Department of Transportation and notify the Traffic Management Center. AB - 6.Barrier walls are an important tool for MOT. However, their set up can have significant impact on traffic capacity and create queues. Project plans should define days/time periods these are permitted to be installed and/or removed. AN - dot:90489 DO - https://doi.org/10.5703/1288284318578 ET - Final Report KW - Decision support systems KW - Detours KW - Mapping KW - Risk assessment KW - Routes and routing KW - Work zone traffic control KW - Maintenance of way LA - English PB - Purdue University. Joint Transportation Research Program PY - 2025-10-28 SN - FHWA/IN/JTRP-2025/29 TI - Case Studies Documenting Lessons Learned and Identifying Opportunities for Maintenance of Traffic (MOT) Improvements M3 - Tech Report N1 - United States N1 - SPR-4854 UR - https://rosap.ntl.bts.gov/view/dot/90489 ER -
Refined Bridge Deck Design and Analysis

Wang, Xun ;

Ghoroubi, Rahim

2025-10-10 | PDF

Since the 1960’s, bridge live loads (design axle loads) and truck volume have been continuously increasing. Truck loads and wheel configurations that bridge decks are designed for according to the AASHTO LRFD Bridge Design Specifications no longer reflect the modern trucks, not mentioning the larger permit vehicles (e.g., P-15) and new vehicle conf ...

05/04/2026

Title : Refined Bridge Deck Design and Analysis Creator(s) : Wang, Xun;Ghoroubi, Rahim;Grayson-Wallace, Brendan;Cheng, Lijuan; Corporate Creator(s) : University of California, Davis. Department of Civil and Environmental Engineering Corporate Contributor(s) : California Department of Transportation. Engineering Service Center;California Department of Transportation. Division of Research, Innovation and System Information; Published Date : 2025-10-10 Report Number : CA25-3668;UCD-SESM-25-01; URL : https://rosap.ntl.bts.gov/view/dot/90488 Wang, Xun et al. (2025). Refined Bridge Deck Design and Analysis. Wang, Xun et al. "Refined Bridge Deck Design and Analysis" (2025) Wang, Xun et al. "Refined Bridge Deck Design and Analysis" , 2025 Export RIS Citation Information. TY - Tech Report AU - Wang, Xun AU - Ghoroubi, Rahim AU - Grayson-Wallace, Brendan AU - Cheng, Lijuan A2 - University of California, Davis. Department of Civil and Environmental Engineering A3 - California Department of Transportation. Engineering Service Center A3 - California Department of Transportation. Division of Research, Innovation and System Information AB - Since the 1960’s, bridge live loads (design axle loads) and truck volume have been continuously increasing. Truck loads and wheel configurations that bridge decks are designed for according to the AASHTO LRFD Bridge Design Specifications no longer reflect the modern trucks, not mentioning the larger permit vehicles (e.g., P-15) and new vehicle configurations mandated or allowed by federal or state programs such as special hauling vehicles (SHV) and emergency vehicles (EV) in the design. The approximate analysis method in the AASHTO LRFD specification that the current bridge deck design procedure is based on lacks sufficient accuracy and is not permitted by the California Amendments to AASHTO for the design of reinforced concrete decks and overhangs. In this research, an updated LRFD-based bridge deck design procedure was developed based on refined analysis methods that consider modern vehicle configurations, dynamic loads, flexural and shear demands. Fatigue-related issues were comprehensively reviewed for reinforced concrete bridge decks in the existing literature with a proposed framework for future study. A large series of finite element analyses of refined reinforced concrete bridge deck models using simplified Rigid Support Model (RSM) concept was conducted under various loading conditions and different girder spacings. The accuracy of the model was satisfactorily validated by a set of detailed 3D bridge models. These comprehensive refined analysis results were then used to develop streamlined charts and an updated deck design table (so called CA-A4, California Amendments to A4) following the same format as the existing AASHTO A4 design table. The updated design values for the negative moment in the CA-A4 cover the negative moment demands generated by the HL-93, SHV, and P-15 vehicles for girder spacings less than 13 ft. Special consideration is recommended for EV3 vehicle load and for the other special vehicle types for girder spacings greater than 13 ft. The proposed bridge deck design procedure is expected to facilitate Caltrans ensuring the safety and adequate load-carrying capacity of reinforced concrete bridge decks to meet the growing traffic demand. AN - dot:90488 ET - Final Report: 11/1/2020 – 10/31/2024 KW - Bridge decks KW - Analysis KW - Design KW - Rigid structures KW - Bridge design KW - Flexural strength KW - Fatigue strength KW - Emergency vehicles KW - Specifications KW - Travel demand management KW - Literature reviews KW - Rigid Support Model (RSM) LA - English PB - California. Department of Transportation PY - 2025-10-10 SN - CA25-3668 TI - Refined Bridge Deck Design and Analysis M3 - Tech Report N1 - United States N1 - 65A0774 TO002 UR - https://rosap.ntl.bts.gov/view/dot/90488 ER -
Experimental Investigation of Development Length Required for Large-Diameter Headed Reinforcing Bars in Tension

Asgharpour, Naveed ;

Raman, Rahul

2025-11-10 | PDF

The study presented in this report was to investigate the anchorage capacities of No. 14 and No. 18 headed bars, including the influence of the embedment length, concrete strength, head size, parallel tie reinforcement, and bar group on the anchorage strength, and evaluate the applicability of the development length requirements for No. 11 or small ...

05/04/2026

Title : Experimental Investigation of Development Length Required for Large-Diameter Headed Reinforcing Bars in Tension Creator(s) : Asgharpour, Naveed;Raman, Rahul;Shing, P. Benson; Corporate Creator(s) : University of California, San Diego. Dept. of Structural Engineering Corporate Contributor(s) : California. Department of Transportation Published Date : 2025-11-10 Report Number : CA 25-4026;UCSD/SSRP-25/01; URL : https://rosap.ntl.bts.gov/view/dot/90487 Asgharpour, Naveed et al. (2025). Experimental Investigation of Development Length Required for Large-Diameter Headed Reinforcing Bars in Tension. Asgharpour, Naveed and Raman, Rahul and Shing, P. Benson "Experimental Investigation of Development Length Required for Large-Diameter Headed Reinforcing Bars in Tension" (2025) Asgharpour, Naveed et al. "Experimental Investigation of Development Length Required for Large-Diameter Headed Reinforcing Bars in Tension" , 2025 Export RIS Citation Information. TY - Tech Report AU - Asgharpour, Naveed AU - Raman, Rahul AU - Shing, P. Benson A2 - University of California, San Diego. Dept. of Structural Engineering A3 - California. Department of Transportation AB - The study presented in this report was to investigate the anchorage capacities of No. 14 and No. 18 headed bars, including the influence of the embedment length, concrete strength, head size, parallel tie reinforcement, and bar group on the anchorage strength, and evaluate the applicability of the development length requirements for No. 11 or smaller headed bars in ACI 318-19 and the 10th Edition of AASHTO LRFD Bridge Design Specifications to larger diameter bars. Thirteen bar anchorage tests were conducted. Eleven of these had single bars and two had double side-by-side bars. Heads with net bearing areas of 4Ab and 9Ab, were considered. The target compressive strengths of the concrete used were 4,000, 6,000, and 8,000 psi. The specimens had bar embedment lengths equal to 70% or 100% of the minimum according to ACI 318-19. The test results show that the anchorage failure of a headed bar is normally initiated by concrete breakout but eventually governed by bar pullout when the bearing strength of the concrete at the T head has been weakened by the opening of breakout cracks. The bar force at which concrete breakout occurs is approximately proportional to the square of the embedment length, rather than the embedment length to the power of 1.5 as specified in ACI 318 for embedded anchor bolts. After the occurrence of breakout cracks, parallel tie reinforcement can play a significant role in providing the necessary anchorage capacity. The specimens that satisfied the development length formula in ACI 318-19 performed satisfactorily. Two specimens that satisfied the AASHTO formula and had a head size of 9Ab had anchorage failures. This indicates that the AASHTO formula over-estimates the influence of the head size. The unified formula in AASHTO considers only the bond strength and the bearing resistance at the T head, and does not explicitly account for concrete breakout. It can be perceived that if anchorage failure is initiated by concrete breakout, the size of the T head will not have a significant influence on the anchorage resistance, as supported by the data in this study and other prior studies on smaller diameter bars, which have shown that the use of a head size greater than 4Ab will not necessarily improve the anchorage capacity and the benefit is small at best. Even though the ACI formula appears to be safe for the large-diameter bars, it is more conservative for No. 18 bars than No. 14 bars, probably due to the fact that the development length is proportional to the bar diameter to the power of 1.5. A rational method has been proposed in this study to determine the development lengths for headed bars and the required parallel tie reinforcement. It is based on the anchor bolt provisions in ACI 318, which have been improved to account for the influence of the bar embedment length and the contribution of the parallel tie reinforcement in an accurate and rational manner. AN - dot:90487 ET - Final Report KW - Bridges KW - Reinforced concrete KW - Reinforcing bars KW - Tension KW - Experiments KW - High strength concrete KW - Testing KW - Cracking KW - Failure KW - Anchorages KW - development length KW - large-diameter bars KW - headed bars KW - No. 14 bars KW - No. 18 bars KW - anchorage strength KW - breakout failure KW - pullout failure LA - English PB - California. Department of Transportation PY - 2025-11-10 SN - CA 25-4026 TI - Experimental Investigation of Development Length Required for Large-Diameter Headed Reinforcing Bars in Tension M3 - Tech Report N1 - United States N1 - 65A1051 UR - https://rosap.ntl.bts.gov/view/dot/90487 ER -
Flight Tests of the Microwave Landing System Multimode Digital Processor

Warren, John

1981-01-01 | PDF

Flight tests were performed to order to evaluate four digital airborne processing techniques. Four techniques used for processing Microwave Landing System (MLS) time reference scanning beam (TRSB) signals are: (1) dwell-gate processing (DGP), (2) single-edge processing (SEP), (3) dual-edge processing (DEP), and (4) split gate processing (SPGT). The ...

05/04/2026

Title : Flight Tests of the Microwave Landing System Multimode Digital Processor Creator(s) : Warren, John Corporate Creator(s) : Federal Aviation Administration Technical Center (U.S.) Published Date : 1981-01-01 Report Number : FAA-CT-80-19 URL : https://rosap.ntl.bts.gov/view/dot/90486 Warren, John (1981). Flight Tests of the Microwave Landing System Multimode Digital Processor. Warren, John "Flight Tests of the Microwave Landing System Multimode Digital Processor" (1981) Warren, John "Flight Tests of the Microwave Landing System Multimode Digital Processor" , 1981 Export RIS Citation Information. TY - Tech Report AU - Warren, John A2 - Federal Aviation Administration Technical Center (U.S.) AB - Flight tests were performed to order to evaluate four digital airborne processing techniques. Four techniques used for processing Microwave Landing System (MLS) time reference scanning beam (TRSB) signals are: (1) dwell-gate processing (DGP), (2) single-edge processing (SEP), (3) dual-edge processing (DEP), and (4) split gate processing (SPGT). These techniques were flight tested under standard partial orbits, glide slopes, and aircraft shadowing. Overall, the SPGT and DGP techniques resulted to about the same errors. The SEP data were noisier than the DGP but usually had about the same bias. The DEP technique was always inferior to the DGP. Aircraft shadowing errors were excessive for all techniques and should be avoided by operating procedures when an aircraft nears the touchdown region. It is recommended that the DEP algorithm be changed for improved no1.se performance and flight tests be performed using all four processing techniques in a specular multipath environment and under conditions using two azimuth antennas having different beam widths (these tests were not performed because of equipment nonavailability during flight testing). AN - dot:90486 ET - Final Report KW - Microwave landing systems KW - Landing aids KW - Image fields in optical scanning KW - Digital communication systems KW - Data processing equipment KW - CALSPAN Processor LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1981-01-01 SN - FAA-CT-80-19 TI - Flight Tests of the Microwave Landing System Multimode Digital Processor M3 - Tech Report N1 - United States N1 - 075-725-420 UR - https://rosap.ntl.bts.gov/view/dot/90486 ER -
Exhaust Emissions Characteristics and Variability for Pratt and Whitney JT8D·7A Gas Turbine Engines Subjected to Major Overhaul and Repair

Becker, Eric ;

Frings, Gary

1980-09-01 | PDF

Seven Pratt and Whitney Aircraft (PWA) JT8D-7A turbofan engines were tested at Kennedy International Airport, New York, to evaluate exhaust emissions characteristics and data variability after overhaul. The measured data show that the engines tested did not meet the Environmental Protection Agency (EPA) emission standards. A comparison of the measu ...

05/04/2026

Title : Exhaust Emissions Characteristics and Variability for Pratt and Whitney JT8D·7A Gas Turbine Engines Subjected to Major Overhaul and Repair Creator(s) : Becker, Eric;Frings, Gary;Cavage, William C.; Corporate Creator(s) : Federal Aviation Administration Technical Center (U.S.) Published Date : 1980-09-01 Report Number : FAA-CT-79-53 URL : https://rosap.ntl.bts.gov/view/dot/90485 Becker, Eric et al. (1980). Exhaust Emissions Characteristics and Variability for Pratt and Whitney JT8D·7A Gas Turbine Engines Subjected to Major Overhaul and Repair. Becker, Eric and Frings, Gary and Cavage, William C. "Exhaust Emissions Characteristics and Variability for Pratt and Whitney JT8D·7A Gas Turbine Engines Subjected to Major Overhaul and Repair" (1980) Becker, Eric et al. "Exhaust Emissions Characteristics and Variability for Pratt and Whitney JT8D·7A Gas Turbine Engines Subjected to Major Overhaul and Repair" , 1980 Export RIS Citation Information. TY - Tech Report AU - Becker, Eric AU - Frings, Gary AU - Cavage, William C. A2 - Federal Aviation Administration Technical Center (U.S.) AB - Seven Pratt and Whitney Aircraft (PWA) JT8D-7A turbofan engines were tested at Kennedy International Airport, New York, to evaluate exhaust emissions characteristics and data variability after overhaul. The measured data show that the engines tested did not meet the Environmental Protection Agency (EPA) emission standards. A comparison of the measured data, obtained from the seven overhauled engines evaluated under this program. with new engine data obtained from PWA show that there is a great deal of similarity between the two sets of data. Differences shown in this report between new engine and overhauled engine data are due to the quantity of the engines sampled; the new engine data represent a larger sample size. Satisfactory data can be measured by using the test procedures. instrumentation, and equipment defined in this report. AN - dot:90485 ET - Final Report KW - Pollutants KW - Nitrogen oxides KW - Carbon monoxide KW - Hydrocarbons LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1980-09-01 SN - FAA-CT-79-53 TI - Exhaust Emissions Characteristics and Variability for Pratt and Whitney JT8D·7A Gas Turbine Engines Subjected to Major Overhaul and Repair M3 - Tech Report N1 - United States N1 - 201-521-100 UR - https://rosap.ntl.bts.gov/view/dot/90485 ER -
Conference Control System Computer-Human Interface Prototype Description and Design Rationale

Pai, Shantanu ;

Allendoerfer, Kenneth R.

2005-08-01 | PDF

The Federal Aviation Administration (FAA) Air Traffic Control System Command Center (ATCSCC) is responsible for the strategic aspects of the National Airspace System (NAS). The ATCSCC modifies traffic flow and rates when congestion, weather, equipment outages, runway closures, or other operational conditions affect the NAS. Controllers at the ATCSC ...

05/04/2026

Title : Conference Control System Computer-Human Interface Prototype Description and Design Rationale Creator(s) : Pai, Shantanu;Allendoerfer, Kenneth R.; Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration;United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center; Published Date : 2005-08-01 Report Number : DOT/FAA/CT- 05/06 URL : https://rosap.ntl.bts.gov/view/dot/90484 Pai, Shantanu and Allendoerfer, Kenneth R. (2005). Conference Control System Computer-Human Interface Prototype Description and Design Rationale. Pai, Shantanu and Allendoerfer, Kenneth R. "Conference Control System Computer-Human Interface Prototype Description and Design Rationale" (2005) Pai, Shantanu and Allendoerfer, Kenneth R. "Conference Control System Computer-Human Interface Prototype Description and Design Rationale" , 2005 Export RIS Citation Information. TY - Tech Report AU - Pai, Shantanu AU - Allendoerfer, Kenneth R. A2 - United States. Department of Transportation. Federal Aviation Administration A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center AB - The Federal Aviation Administration (FAA) Air Traffic Control System Command Center (ATCSCC) is responsible for the strategic aspects of the National Airspace System (NAS). The ATCSCC modifies traffic flow and rates when congestion, weather, equipment outages, runway closures, or other operational conditions affect the NAS. Controllers at the ATCSCC accomplish these tasks by communicating with NAS stakeholders like local FAA facilities, airlines, and other national civil aviation authorities. In 2004, the FAA deployed the Conference Control System (CCS) as part of infrastructure modernization to meet increased capacity demands. The CCS provides many new functions and a computer-human interface (CHI) based on touch-entry display (TED) technology. The NAS Human Factors Group conducted a user-centered design project to explore the CCS CHI requirements. In collaboration with the CCS User Team, we developed mouse- and TED-based CHI prototypes to demonstrate the potential CCS functionality. This report discusses the approach we took in designing the CCS prototype and the rationale for each of the important CHI elements. Many of the concepts developed in the prototype were implemented into the operational CCS. The report also discusses the role of iterative prototyping in increasing designers’ and users’ understanding of the tasks, requirements, and CHI development process. Future programs can use the design rationale to guide the creation of CHIs for new telecommunication systems. We believe that the design approach adopted in this project allowed for a better elicitation of the user requirements and helped educate the user team regarding human factors and usability issues. AN - dot:90484 KW - Air traffic control KW - Command centers KW - Prototypes KW - Information display systems LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2005-08-01 SN - DOT/FAA/CT- 05/06 TI - Conference Control System Computer-Human Interface Prototype Description and Design Rationale M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90484 ER -
Bearing and System Sensitivity Measurements on the GPS Fixed Interference Monitoring Detection System (FIMDS)

Levitski, Stephen J.

2003-01-31 | PDF

This paper documents the testing activities and their results which have taken place at the Federal Aviation Administration's William J. Hughes Technical Center (WJHTC) in order to assess the Direction Finding (DF) capabilities of the Cubic AA2030 DF Antenna Array and DF4400 Processor in the GPS L1 band and in the *VHF air-to-ground Communications ...

05/04/2026

Title : Bearing and System Sensitivity Measurements on the GPS Fixed Interference Monitoring Detection System (FIMDS) Creator(s) : Levitski, Stephen J. 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 Published Date : 2003-01-31 Report Number : DOT/FAA/CT-05/2 URL : https://rosap.ntl.bts.gov/view/dot/90483 Levitski, Stephen J. (2003). Bearing and System Sensitivity Measurements on the GPS Fixed Interference Monitoring Detection System (FIMDS). Levitski, Stephen J. "Bearing and System Sensitivity Measurements on the GPS Fixed Interference Monitoring Detection System (FIMDS)" (2003) Levitski, Stephen J. "Bearing and System Sensitivity Measurements on the GPS Fixed Interference Monitoring Detection System (FIMDS)" , 2003 Export RIS Citation Information. TY - Tech Report AU - Levitski, Stephen J. A2 - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center A3 - United States. Department of Transportation. Federal Aviation Administration AB - This paper documents the testing activities and their results which have taken place at the Federal Aviation Administration's William J. Hughes Technical Center (WJHTC) in order to assess the Direction Finding (DF) capabilities of the Cubic AA2030 DF Antenna Array and DF4400 Processor in the GPS L1 band and in the *VHF air-to-ground Communications band. AN - dot:90483 ET - Final Report KW - Global Positioning System KW - Detection and identification systems KW - Monitoring KW - Sensitivity KW - Bearing tests KW - Field tests LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 2003-01-31 SN - DOT/FAA/CT-05/2 TI - Bearing and System Sensitivity Measurements on the GPS Fixed Interference Monitoring Detection System (FIMDS) M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90483 ER -
Caltrans Traffic Operations Data Standards Implementation Recommendations

Patire, Anthony D.

2025-05-13 | PDF

This report investigates the evolving landscape of data standards within the transportation ecosystem, emphasizing their critical role in enabling interoperability, safety, and innovation across Intelligent Transportation Systems (ITS). The report outlines a strategic approach for advancing transportation data interoperability, emphasizing the need ...

05/04/2026

Title : Caltrans Traffic Operations Data Standards Implementation Recommendations Creator(s) : Patire, Anthony D. Corporate Creator(s) : University of California, Berkeley. California Partners for Advanced Transportation Technology Corporate Contributor(s) : California. Department of Transportation Published Date : 2025-05-13 Report Number : CA25-4085 URL : https://rosap.ntl.bts.gov/view/dot/90482 Patire, Anthony D. (2025). Caltrans Traffic Operations Data Standards Implementation Recommendations. Patire, Anthony D. "Caltrans Traffic Operations Data Standards Implementation Recommendations" (2025) Patire, Anthony D. "Caltrans Traffic Operations Data Standards Implementation Recommendations" , 2025 Export RIS Citation Information. TY - Tech Report AU - Patire, Anthony D. A2 - University of California, Berkeley. California Partners for Advanced Transportation Technology A3 - California. Department of Transportation AB - This report investigates the evolving landscape of data standards within the transportation ecosystem, emphasizing their critical role in enabling interoperability, safety, and innovation across Intelligent Transportation Systems (ITS). The report outlines a strategic approach for advancing transportation data interoperability, emphasizing the need for implementation guidance to complement evolving standards. Effective interoperability requires five key components: robust data curation, discoverability, identity management, data exchange, and analytics. The private sector has a vital role to play—competing in analytics and user-facing applications—while resisting vendor lock-in that hampers long term integration. Emerging standards for Connected Work Zones (CWZ) represent a critical near-term opportunity, with Caltrans positioned to lead by modernizing its Lane Closure System (LCS), engaging stakeholders, and aligning business processes with data needs. The report concludes with actionable next steps for Caltrans, including developing data ontologies, piloting CWZ-compliant workflows, and investing in open, scalable infrastructure to support a safer, more connected transportation ecosystem. AN - dot:90482 ET - Final Report: 08/23-06/25 KW - Standards KW - Data analysis KW - Data sharing KW - Interoperability KW - Digital infrastructure KW - Transportation system management KW - Communication systems KW - Work zones KW - Intelligent transportation systems KW - Lane closure KW - Implementation KW - Guidelines KW - Recommendations KW - Data standards KW - data exchange KW - digital transportation infrastructure KW - connected work zones LA - English PB - California. Department of Transportation PY - 2025-05-13 SN - CA25-4085 TI - Caltrans Traffic Operations Data Standards Implementation Recommendations M3 - Tech Report N1 - United States N1 - 65A1019, Task ID 4085 UR - https://rosap.ntl.bts.gov/view/dot/90482 ER -
Development of an Improved Biodynamic Model for SOM-LA/TA

Lankarani, Hamid M. ;

Shivaswamy, Shashishekar

1994-09-01 | PDF

An improvised SOM-LA/TA biodynamics model has been developed for the Hybrid II Anthropomorphic Test Dummy (ATD). This improved model more accurately predicts the HIC and lumbar load of an ATD subjected to the dynamic tests specified in FAR Part 23.562.b(l) & (2). Then dynamic tests were conducted at the Impact Dynamics Laboratory at National Instit ...

05/04/2026

Title : Development of an Improved Biodynamic Model for SOM-LA/TA Creator(s) : Lankarani, Hamid M.;Shivaswamy, Shashishekar; Corporate Creator(s) : National Institute for Aviation Research (U.S.);Wichita State University; Published Date : 1994-09-01 Report Number : DOT/FAA/CT-03-91-C-00044 URL : https://rosap.ntl.bts.gov/view/dot/90481 Lankarani, Hamid M. and Shivaswamy, Shashishekar (1994). Development of an Improved Biodynamic Model for SOM-LA/TA. Lankarani, Hamid M. and Shivaswamy, Shashishekar "Development of an Improved Biodynamic Model for SOM-LA/TA" (1994) Lankarani, Hamid M. and Shivaswamy, Shashishekar "Development of an Improved Biodynamic Model for SOM-LA/TA" , 1994 Export RIS Citation Information. TY - Tech Report AU - Lankarani, Hamid M. AU - Shivaswamy, Shashishekar A2 - National Institute for Aviation Research (U.S.) A2 - Wichita State University AB - An improvised SOM-LA/TA biodynamics model has been developed for the Hybrid II Anthropomorphic Test Dummy (ATD). This improved model more accurately predicts the HIC and lumbar load of an ATD subjected to the dynamic tests specified in FAR Part 23.562.b(l) & (2). Then dynamic tests were conducted at the Impact Dynamics Laboratory at National Institute for Aviation Research at various deceleration loads of 14, 19, 25 and 32 g's. The effect of the occupant size on the response of a seat/ occupant/ restraint system was studied by the construction of a few non-standard occupant data bases. In an effort to improve the head injury protection for passengers seated behind interior walls in transport aircraft, a head strike test apparatus was designed and constructed. Preliminary tests were conducted to evaluate Head Injury criteria (HIC)using the head component tests. Suitable energy absorbing padding materials were identified using both analytical and experimental measures. Guidelines were also developed for design and development of infant and child seats and restraint systems. Finally, recommendations for further improvements and research to be carried out is discussed. AN - dot:90481 ET - Final Report KW - Dummies KW - Anthropometry KW - Dynamic tests KW - Biodynamics KW - Aviation KW - SOM-LA/TA LA - English PB - United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center PY - 1994-09-01 SN - DOT/FAA/CT-03-91-C-00044 TI - Development of an Improved Biodynamic Model for SOM-LA/TA M3 - Tech Report N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90481 ER -
Effect of Fines on Liquefaction Triggering Analyses

Renugah, Varun N. S. ;

Sahin, Arda

2025-12-01 | PDF

This report presents a new framework for applying fines content corrections in soil liquefaction evaluations. Fines content affects both penetration resistance and cyclic resistance, but current methods use a single correction to represent both effects. This study separates these influences by using variable-rate CPT data to assess the effect of fi ...

05/04/2026

Title : Effect of Fines on Liquefaction Triggering Analyses Creator(s) : Renugah, Varun N. S.;Sahin, Arda;Brandenberg, Scott J.;Stewart, Jonathan P.; Corporate Creator(s) : Natural Hazards Risk and Resiliency Research Center (NHR3). Department of Civil and Environmental Engineering. University of California, Los Angeles Published Date : 2025-12-01 Report Number : CA25-4418 URL : https://rosap.ntl.bts.gov/view/dot/90480 Renugah, Varun N. S. et al. (2025). Effect of Fines on Liquefaction Triggering Analyses. Renugah, Varun N. S. et al. "Effect of Fines on Liquefaction Triggering Analyses" (2025) Renugah, Varun N. S. et al. "Effect of Fines on Liquefaction Triggering Analyses" , 2025 Export RIS Citation Information. TY - Tech Report AU - Renugah, Varun N. S. AU - Sahin, Arda AU - Brandenberg, Scott J. AU - Stewart, Jonathan P. A2 - Natural Hazards Risk and Resiliency Research Center (NHR3). Department of Civil and Environmental Engineering. University of California, Los Angeles AB - This report presents a new framework for applying fines content corrections in soil liquefaction evaluations. Fines content affects both penetration resistance and cyclic resistance, but current methods use a single correction to represent both effects. This study separates these influences by using variable-rate CPT data to assess the effect of fines on penetration resistance, and cyclic laboratory test data to evaluate their impact on cyclic resistance. While fines consistently reduce penetration resistance, their effect on cyclic strength may increase or decrease depending on factors such as coarse fraction state, fines plasticity, and over consolidation. The influence of fines on CPT drainage conditions is examined to develop relationships that adjust measured cone resistance to equivalent drained conditions using the soil behavior type index. These relationships allow CPT data obtained under partially drained or undrained conditions to be normalized to clean-sand conditions. A methodology is proposed for evaluating cyclic strength of soils with varying fines content by integrating clean-sand liquefaction triggering concepts with fine-grained soil cyclic failure models. Clean sand resistance is evaluated using an NGL laboratory-based model, while fine-grained soil resistance is estimated using a new model developed in this report that accounts for plasticity and over consolidation. An interpolation approach is provided for soils with intermediate fines content. The proposed corrections are applied to critical layer data from an existing CPT-based triggering model and compared with legacy approaches. The study also assesses alternative seismic intensity measures and finds no improvement over peak horizontal acceleration and magnitude when evaluated against field liquefaction data. AN - dot:90480 ET - 4/08/2024 - 2/28/2025 KW - Fine materials KW - Liquefaction KW - Cyclic strength KW - Resistance tests KW - Cone penetrometers KW - Laboratory tests KW - Cyclic tests KW - Data analysis KW - Soil components KW - Sand KW - Fines content KW - liquefaction triggering KW - cyclic softening KW - cyclic resistance ratio KW - cone penetration test LA - English PB - California. Department of Transportation PY - 2025-12-01 SN - CA25-4418 TI - Effect of Fines on Liquefaction Triggering Analyses M3 - Tech Report N1 - United States N1 - 65A0774 TO 011 UR - https://rosap.ntl.bts.gov/view/dot/90480 ER -
Determination of Recovery Bridge Corridors by Comparing Post EQ Network

Soga, Kenichi

;

Wang, Ziqi

2025-12-02 | PDF

This study focuses on Caltrans District 4 in the San Francisco Bay Area (Alameda, Contra Costa, Marin, Napa, San Francisco, Santa Clara, San Mateo, Solano, and Sonoma). It proposes a framework to identify and prioritize critical bridge corridors that enable access to emergency facilities, including hospitals, fire stations, police stations, Caltran ...

05/04/2026

Title : Determination of Recovery Bridge Corridors by Comparing Post EQ Network Creator(s) : Soga, Kenichi;Wang, Ziqi;Becker, Tracy C.;Zhao, Bingyu;Li, Pengshun; Corporate Creator(s) : University of California, Berkeley. Pacific Earthquake Engineering Research Center Corporate Contributor(s) : California. Department of Transportation Published Date : 2025-12-02 Report Number : CA25-3798 URL : https://rosap.ntl.bts.gov/view/dot/90479 Soga, Kenichi et al. (2025). Determination of Recovery Bridge Corridors by Comparing Post EQ Network. Soga, Kenichi et al. "Determination of Recovery Bridge Corridors by Comparing Post EQ Network" (2025) Soga, Kenichi et al. "Determination of Recovery Bridge Corridors by Comparing Post EQ Network" , 2025 Export RIS Citation Information. TY - Tech Report AU - Soga, Kenichi AU - Wang, Ziqi AU - Becker, Tracy C. AU - Zhao, Bingyu AU - Li, Pengshun A2 - University of California, Berkeley. Pacific Earthquake Engineering Research Center A3 - California. Department of Transportation AB - This study focuses on Caltrans District 4 in the San Francisco Bay Area (Alameda, Contra Costa, Marin, Napa, San Francisco, Santa Clara, San Mateo, Solano, and Sonoma). It proposes a framework to identify and prioritize critical bridge corridors that enable access to emergency facilities, including hospitals, fire stations, police stations, Caltrans maintenance facilities, airports, seaports, and ferry terminals. Bridges are first grouped into corridors using an interchange-based approach. Next, a shortest-path algorithm is applied to find routes from each zip-based zone to its nearest facility of each type. Corridor “usage” is computed from how frequently corridors appear on these access routes, and total usage is used to rank corridor criticality. Bridges within top corridors are then evaluated and ranked using damage probabilities. The proposed method is validated against Google Maps, showing 5.6% route dissimilarity, indicating that access to critical facilities strongly depends on Caltrans routes. Corridor importance varies by facility type because facility distributions differ. For example, District 4 contains 563 fire stations across 298 zones, so most zones access a fire station locally and only 31 zones require Caltrans bridges, whereas 159 zones require Caltrans bridges to reach hospitals. The study also compares corridor rankings with and without population weighting. Without population, top corridors often occur in rural areas that serve as sole connectors for multiple zones; adding population shifts priorities toward densely populated areas, highlighting the need to define planning objectives. An updated methodology is proposed to remove selected corridors and recomputes rankings to test impacts, showing rural corridors are often irreplaceable while urban networks are highly redundant. Finally, another optimization method is introduced to minimize the number of Caltrans bridges used, trading off travel time to reduce recovery designations and costs. A web-based platform implements and visualizes these methods. AN - dot:90479 ET - Final Report: June 01, 2022 - February 28, 2025 KW - Highway bridges KW - Highway corridors KW - Case studies KW - Visualization KW - Alternatives analysis KW - Statistical ranking KW - Urban areas KW - Travel by area KW - Computer networks KW - Rural areas KW - Earthquakes KW - Stochastic processes LA - English PB - California. Department of Transportation PY - 2025-12-02 SN - CA25-3798 TI - Determination of Recovery Bridge Corridors by Comparing Post EQ Network M3 - Tech Report N1 - United States N1 - 65A0774 TO 007 UR - https://rosap.ntl.bts.gov/view/dot/90479 ER -
Soil Amendment Guidance for Infiltration and Stormwater Treatment

Mohanty, Sanjay K. ;

Stenstrom, Michael K.

2025-10-01 | PDF

Pollutants from roadway runoff are the leading cause of surface water impairments. Thus, treatment of road runoff by building roadside stormwater best management practices (BMPs) could prevent pollution and turn the road infrastructure into a sustainable water solution. However, limited infiltration in compacted roadside soil poses a significant ch ...

05/04/2026

Title : Soil Amendment Guidance for Infiltration and Stormwater Treatment Creator(s) : Mohanty, Sanjay K.;Stenstrom, Michael K.;Das, Tonoy K.;Tummala, Chandra; Corporate Creator(s) : University of California, Los Angeles. Department of Civil and Environmental Engineering Corporate Contributor(s) : California. Department of Transportation Published Date : 2025-10-01 URL : https://rosap.ntl.bts.gov/view/dot/90478 Mohanty, Sanjay K. et al. (2025). Soil Amendment Guidance for Infiltration and Stormwater Treatment. Mohanty, Sanjay K. et al. "Soil Amendment Guidance for Infiltration and Stormwater Treatment" (2025) Mohanty, Sanjay K. et al. "Soil Amendment Guidance for Infiltration and Stormwater Treatment" , 2025 Export RIS Citation Information. TY - Tech Report AU - Mohanty, Sanjay K. AU - Stenstrom, Michael K. AU - Das, Tonoy K. AU - Tummala, Chandra A2 - University of California, Los Angeles. Department of Civil and Environmental Engineering A3 - California. Department of Transportation AB - Pollutants from roadway runoff are the leading cause of surface water impairments. Thus, treatment of road runoff by building roadside stormwater best management practices (BMPs) could prevent pollution and turn the road infrastructure into a sustainable water solution. However, limited infiltration in compacted roadside soil poses a significant challenge to designing roadside BMPs. To overcome this challenge, roadside or curbside soil where compaction is required could be mixed with amendments to alleviate the negative impact of compaction and increase infiltration and stormwater treatment. Compaction could decrease the amendment’s particle size if it crumbles under pressure. Furthermore, the amendment amount could vary based on soil hydraulic properties. This study aims to provide selection guidance for amendments and their quantity to achieve stormwater treatment goals in curbside soil where compaction is required for road design. To create a study that is representative of all California soil types, soils were collected within Caltrans Right of Way (ROW) from 8 sites, with two soil sites from each of the four hydrologic soil groups (HSG) A, B, C, and D. The selected physical, geotechnical, and chemical properties of all soils were measured to verify their HSG type. All soils exhibited a limited infiltration capacity under compaction and contained low organic carbon, indicating amendments were needed to improve their capacity to infiltrate stormwater and remove pollutants. AN - dot:90478 KW - Soil aggregates KW - Infiltration KW - Drainage KW - Soil compaction KW - Sand KW - Hydrology KW - Pollutants KW - Roadside KW - Best practices KW - Highway design KW - Soils by properties LA - English PB - California. Department of Transportation PY - 2025-10-01 TI - Soil Amendment Guidance for Infiltration and Stormwater Treatment M3 - Tech Report N1 - United States N1 - 65A0715 UR - https://rosap.ntl.bts.gov/view/dot/90478 ER -
Mobile Electric Vehicle DCFC Infrastructure Deployment Opportunities

Motallebi, Farhang ;

Sim, Evan

2025-09-30 | PDF

This research was conducted to identify and evaluate mobile and semi-permanent DC fast-charging (DCFC) solutions for the California Department of Transportation's (Caltrans) growing electric vehicle (EV) fleet. To address infrastructure gaps that delay charging station deployments and hinder fleet operations, a comprehensive evaluation framework wa ...

05/04/2026

Title : Mobile Electric Vehicle DCFC Infrastructure Deployment Opportunities Creator(s) : Motallebi, Farhang;Sim, Evan;Haas, Meridian;Nazari, Shima; Corporate Creator(s) : AHMCT Research Center. UCD Dept. of Mechanical & Aerospace Engineering Corporate Contributor(s) : California. Department of Transportation Published Date : 2025-09-30 Report Number : CA25-4409;UCD-ARR-25-09-30-01; URL : https://rosap.ntl.bts.gov/view/dot/90477 Motallebi, Farhang et al. (2025). Mobile Electric Vehicle DCFC Infrastructure Deployment Opportunities. Motallebi, Farhang et al. "Mobile Electric Vehicle DCFC Infrastructure Deployment Opportunities" (2025) Motallebi, Farhang et al. "Mobile Electric Vehicle DCFC Infrastructure Deployment Opportunities" , 2025 Export RIS Citation Information. TY - Tech Report AU - Motallebi, Farhang AU - Sim, Evan AU - Haas, Meridian AU - Nazari, Shima A2 - AHMCT Research Center. UCD Dept. of Mechanical & Aerospace Engineering A3 - California. Department of Transportation AB - This research was conducted to identify and evaluate mobile and semi-permanent DC fast-charging (DCFC) solutions for the California Department of Transportation's (Caltrans) growing electric vehicle (EV) fleet. To address infrastructure gaps that delay charging station deployments and hinder fleet operations, a comprehensive evaluation framework was developed to compare mobile and semi-permanent DCFC stations and assess their applicability and adequacy for Caltrans operations with different EVs in their fleet. The study involved product search and review of candidate systems, procurement, installation, and extensive field testing of two selected chargers, the EVESCO EVES-6060-NA and the FreeWire Boost Charger 200, under diverse operating conditions. Researchers conducted comprehensive evaluations including vehicle compatibility testing, charging performance analysis, infrastructure requirements assessment, and battery management optimization. The methodology incorporated technical and economic factors such as installation requirements, compatibility with different vehicle types, charging efficiency, and battery degradation over time, measuring parameters such as charging efficiency (87-91%), power delivery (25-45kW for EVES-6060-NA, up to 200kW for FreeWire), and operational constraints. The findings revealed critical operational insights for both systems, with the EVES-6060-NA demonstrating compatibility with all of tested Caltrans fleet Electric vehicles (all seven Caltrans‑ priority vehicles) vehicle but limited public DCFC compatibility (35% success rate), while the FreeWire Boost Charger 200 analysis identified some battery degradation concerns with current operating parameters and recommended operational setpoint adjustments to extend battery life. The results highlight that while the EVESCO EVES-6060-NA offers fully mobile charging with moderate power delivery, the FreeWire Boost Charger 200 provides higher throughput but requires more site preparation and permitting. Both chargers help alleviate infrastructure constraints by allowing partial or full operation without immediate reliance on high-capacity utility connections. This study provides Caltrans with actionable recommendations for implementing mobile and semi-permanent charging solutions while highlighting critical considerations for procurement planning, operational deployment, and long-term asset management to promote the rapid and reliable electrification of their vehicle fleet. AN - dot:90477 ET - Final Report: September 2023 - July 2025 KW - Direct current KW - Battery chargers KW - Electrical equipment KW - Electric vehicle charging KW - Portable equipment KW - Installation KW - Evaluation KW - Analysis KW - Mobile applications KW - Infrastructure KW - Deployment KW - Fleet safety KW - Field tests KW - Direct Current Fast Charger (DCFC) KW - Mobile Electric Vehicle Charging station KW - Battery Degradation KW - CCS1 KW - NACS KW - Portable EV Charging KW - Portable DC fast charger KW - Battery Emulator KW - EVSE LA - English PB - Advanced Highway Maintenance and Construction Technology Research Center (Calif.) PY - 2025-09-30 SN - CA25-4409 TI - Mobile Electric Vehicle DCFC Infrastructure Deployment Opportunities M3 - Tech Report N1 - United States N1 - T65A0749 Task 4409 UR - https://rosap.ntl.bts.gov/view/dot/90477 ER -
Aviation News: September 1994

United States. Department of Transportation. Federal Aviation Administration

1994-09-01 | FAA Aviation News | PDF

Aviation News was published from 1961-circa 2002 in the interest of aviation safety and to acquaint readers with the policies and programs of the Federal Aviation Administration (previously the Federal Aviation Agency). The magazine focused on flight safety by creating awareness of technical, regulatory, and procedural matters affecting the safe op ...

05/01/2026

Title : Aviation News: September 1994 Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration Published Date : 1994-09-01 Series : FAA Aviation News DOI : https://doi.org/10.21949/szw6-4816 United States. Department of Transportation. Federal Aviation Administration (1994). Aviation News: September 1994. https://doi.org/10.21949/szw6-4816 United States. Department of Transportation. Federal Aviation Administration "Aviation News: September 1994" (1994), https://doi.org/10.21949/szw6-4816 United States. Department of Transportation. Federal Aviation Administration "Aviation News: September 1994" , 1994, https://doi.org/10.21949/szw6-4816 Export RIS Citation Information. TY - Newsletters A2 - United States. Department of Transportation. Federal Aviation Administration AB - Aviation News was published from 1961-circa 2002 in the interest of aviation safety and to acquaint readers with the policies and programs of the Federal Aviation Administration (previously the Federal Aviation Agency). The magazine focused on flight safety by creating awareness of technical, regulatory, and procedural matters affecting the safe operation of aircraft. The magazine’s title changed over the years between FAA Aviation News, Aviation News, and FAA General Aviation News. AN - dot:90476 DO - https://doi.org/10.21949/szw6-4816 ET - Vol. 33, No. 6 KW - Aviation safety KW - Aeronautics KW - Aviation KW - News KW - Air pilots KW - Policy, legislation and regulation KW - Air transportation crashes KW - Survival KW - Weather conditions LA - English PB - United States. Department of Transportation. Federal Aviation Administration PY - 1994-09-01 T2 - FAA Aviation News TI - Aviation News: September 1994 M3 - Newsletters N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90476 ER -
Aviation News: July-August 1994

United States. Department of Transportation. Federal Aviation Administration

1994-07-01 | FAA Aviation News | PDF

Aviation News was published from 1961-circa 2002 in the interest of aviation safety and to acquaint readers with the policies and programs of the Federal Aviation Administration (previously the Federal Aviation Agency). The magazine focused on flight safety by creating awareness of technical, regulatory, and procedural matters affecting the safe op ...

05/01/2026

Title : Aviation News: July-August 1994 Corporate Creator(s) : United States. Department of Transportation. Federal Aviation Administration Published Date : 1994-07-01 Series : FAA Aviation News DOI : https://doi.org/10.21949/jh5p-ky27 United States. Department of Transportation. Federal Aviation Administration (1994). Aviation News: July-August 1994. https://doi.org/10.21949/jh5p-ky27 United States. Department of Transportation. Federal Aviation Administration "Aviation News: July-August 1994" (1994), https://doi.org/10.21949/jh5p-ky27 United States. Department of Transportation. Federal Aviation Administration "Aviation News: July-August 1994" , 1994, https://doi.org/10.21949/jh5p-ky27 Export RIS Citation Information. TY - Newsletters A2 - United States. Department of Transportation. Federal Aviation Administration AB - Aviation News was published from 1961-circa 2002 in the interest of aviation safety and to acquaint readers with the policies and programs of the Federal Aviation Administration (previously the Federal Aviation Agency). The magazine focused on flight safety by creating awareness of technical, regulatory, and procedural matters affecting the safe operation of aircraft. The magazine’s title changed over the years between FAA Aviation News, Aviation News, and FAA General Aviation News. AN - dot:90475 DO - https://doi.org/10.21949/jh5p-ky27 ET - Vol. 33, No. 5 KW - Aviation safety KW - Aeronautics KW - Aviation KW - News KW - Air pilots KW - Policy, legislation and regulation KW - Air transportation crashes KW - Survival KW - Weather conditions LA - English PB - United States. Department of Transportation. Federal Aviation Administration PY - 1994-07-01 T2 - FAA Aviation News TI - Aviation News: July-August 1994 M3 - Newsletters N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90475 ER -
DOT Today: February 1992

United States. Department of Transportation ...

1992-02-01 | DOT Today | PDF

DOT Today was an official publication of the U.S. Department of Transportation distributed to employees nationwide. It compiled news releases, wire stories, trade journal articles, and information provided by the various operating administrations within the USDOT.

05/01/2026

Title : DOT Today: February 1992 Corporate Creator(s) : United States. Department of Transportation;United States. Department of Transportation. Office of the Secretary. Office of Public Affairs; Published Date : 1992-02-01 Series : DOT Today DOI : https://doi.org/10.21949/mag8-nv31 United States. Department of Transportation (1992). DOT Today: February 1992. https://doi.org/10.21949/mag8-nv31 United States. Department of Transportation "DOT Today: February 1992" (1992), https://doi.org/10.21949/mag8-nv31 United States. Department of Transportation "DOT Today: February 1992" , 1992, https://doi.org/10.21949/mag8-nv31 Export RIS Citation Information. TY - Newsletters A2 - United States. Department of Transportation A2 - United States. Department of Transportation. Office of the Secretary. Office of Public Affairs AB - DOT Today was an official publication of the U.S. Department of Transportation distributed to employees nationwide. It compiled news releases, wire stories, trade journal articles, and information provided by the various operating administrations within the USDOT. AN - dot:90474 DO - https://doi.org/10.21949/mag8-nv31 ET - Vol. 1, No. 5 KW - News KW - Employee communications KW - Transportation departments KW - Federal government agencies KW - Government employees KW - Management and organization KW - Awards KW - Employee benefits KW - Transportation safety LA - English PB - United States. Department of Transportation PY - 1992-02-01 T2 - DOT Today TI - DOT Today: February 1992 M3 - Newsletters N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90474 ER -
DOT Today: January 1992

United States. Department of Transportation ...

1992-01-01 | DOT Today | PDF

DOT Today was an official publication of the U.S. Department of Transportation distributed to employees nationwide. It compiled news releases, wire stories, trade journal articles, and information provided by the various operating administrations within the USDOT.

05/01/2026

Title : DOT Today: January 1992 Corporate Creator(s) : United States. Department of Transportation;United States. Department of Transportation. Office of the Secretary. Office of Public Affairs; Published Date : 1992-01-01 Series : DOT Today DOI : https://doi.org/10.21949/10th-1e71 United States. Department of Transportation (1992). DOT Today: January 1992. https://doi.org/10.21949/10th-1e71 United States. Department of Transportation "DOT Today: January 1992" (1992), https://doi.org/10.21949/10th-1e71 United States. Department of Transportation "DOT Today: January 1992" , 1992, https://doi.org/10.21949/10th-1e71 Export RIS Citation Information. TY - Newsletters A2 - United States. Department of Transportation A2 - United States. Department of Transportation. Office of the Secretary. Office of Public Affairs AB - DOT Today was an official publication of the U.S. Department of Transportation distributed to employees nationwide. It compiled news releases, wire stories, trade journal articles, and information provided by the various operating administrations within the USDOT. AN - dot:90473 DO - https://doi.org/10.21949/10th-1e71 ET - Vol. 1, No. 4 KW - News KW - Employee communications KW - Transportation departments KW - Federal government agencies KW - Government employees KW - Management and organization KW - Awards KW - Employee benefits KW - Transportation safety LA - English PB - United States. Department of Transportation PY - 1992-01-01 T2 - DOT Today TI - DOT Today: January 1992 M3 - Newsletters N1 - United States UR - https://rosap.ntl.bts.gov/view/dot/90473 ER -

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