The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations.
Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.
The objective of this project was to conduct experimental testing on fence designs that are effective in preventing diamondback terrapins (Malaclemys terrapin) from entering roadways to prevent the species from being impacted by road mortality. The diamondback terrapin is listed as a State Species of Concern in the State of Georgia. They are the on
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Andrews, K. M., & Crossman, A. C. (2025). Experimental Tests for an Effective Barrier Design to Exclude Diamondback Terrapins (Malaclemys terrapin) from Roads (Report No. FHWA-GA-25-2233). Georgia. Dept. of Transporation. Office of Performance-Based Management and Research. https://rosap.ntl.bts.gov/view/dot/79324
Andrews, Kimberly M and Abbey C Crossman. Experimental Tests for an Effective Barrier Design to Exclude Diamondback Terrapins (Malaclemys terrapin) from Roads. Report no. FHWA-GA-25-2233. Georgia. Dept. of Transporation. Office of Performance-Based Management and Research, 2025. https://rosap.ntl.bts.gov/view/dot/79324.
Andrews, Kimberly M, and Abbey C Crossman Experimental Tests for an Effective Barrier Design to Exclude Diamondback Terrapins (Malaclemys terrapin) from Roads. Georgia. Dept. of Transporation. Office of Performance-Based Management and Research, 2025, Report no. FHWA-GA-25-2233, ROSA P. https://rosap.ntl.bts.gov/view/dot/79324.
The overarching goal of this study was to advance the deployment of innovative pavement technologies prevalent in the state of Missouri. In this study, the focus was on evaluating recycled polymers for use in asphalt mixtures and Balanced Mixture Design (BMD) implementation. Nine test sections were constructed on I-155 near Hayti, MO. Six sections
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Buttlar, W. G. (2025). Implementation of Balanced Mixture Design in Missouri Test Sections with Modifiers [Summary]. Missouri. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/80357
Buttlar, William G.. Implementation of Balanced Mixture Design in Missouri Test Sections with Modifiers [Summary]. Missouri. Department of Transportation, 2025. https://rosap.ntl.bts.gov/view/dot/80357.
Buttlar, William G. Implementation of Balanced Mixture Design in Missouri Test Sections with Modifiers [Summary]. Missouri. Department of Transportation, 2025, ROSA P. https://rosap.ntl.bts.gov/view/dot/80357.
Certain types of waste ashes can increase the decarbonation of cement and concrete, providing a use for the waste ashes and promoting sustainability.
Wang, K. (2025). Beneficial Use of Iowa Waste Ashes in Concrete through Carbon Sequestration [Tech Transfer Summary]. Iowa State University. Institute for Transportation. https://rosap.ntl.bts.gov/view/dot/82855
Wang, Kejin. Beneficial Use of Iowa Waste Ashes in Concrete through Carbon Sequestration [Tech Transfer Summary]. Iowa State University. Institute for Transportation, 2025. https://rosap.ntl.bts.gov/view/dot/82855.
Wang, Kejin Beneficial Use of Iowa Waste Ashes in Concrete through Carbon Sequestration [Tech Transfer Summary]. Iowa State University. Institute for Transportation, 2025, ROSA P. https://rosap.ntl.bts.gov/view/dot/82855.
The South Dakota Department of Transportation (SDDOT) is pursuing a statewide Traffic Operations Center (TOC) to improve transportation on its roadways. The effort required to establish a TOC is significant; thus, the SDDOT commissioned a feasibility study and report. The project gathered stakeholder input, performed research on nationwide practice
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Bittner, M., Hvizdos, K., Smith, T., & Stribiak, J. (2025). Feasibility of a Traffic Operations Center for South Dakota (Report No. SD2022-08). South Dakota. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/80601
Bittner, Mike, Kate Hvizdos, Ted Smith, and Jason Stribiak. Feasibility of a Traffic Operations Center for South Dakota. Report no. SD2022-08. South Dakota. Department of Transportation, 2025. https://rosap.ntl.bts.gov/view/dot/80601.
Bittner, Mike, et al. Feasibility of a Traffic Operations Center for South Dakota. South Dakota. Department of Transportation, 2025, Report no. SD2022-08, ROSA P. https://rosap.ntl.bts.gov/view/dot/80601.
United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
2025-01-01
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OST-R Research Roundup
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News from across OST-R and its research community.
United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology (2025). OST-R Research Roundup: January 2025. United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology. https://rosap.ntl.bts.gov/view/dot/79604
United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology. OST-R Research Roundup: January 2025. United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology, 2025. https://rosap.ntl.bts.gov/view/dot/79604.
United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology OST-R Research Roundup: January 2025. United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology, 2025, ROSA P. https://rosap.ntl.bts.gov/view/dot/79604.
The Wireless charging pavements, which leverage induction charging via primary and secondary coils in concrete pavements, allow an EV to charge either while stationary or traveling as fast as 62 miles per hour (mph) (e.g., the Qualcomm developed testbed). Wireless charging pavements can help reduce the “range anxiety” of EV owners and eventually in
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Aziz, H. A. (2025). Wireless Charging Revenue Generation from Kansas Pavements [Technical Summary] (Report No. K-TRAN: KSU-22-7). Kansas State University. Transportation Center. https://rosap.ntl.bts.gov/view/dot/79629
Aziz, H.M. Abdul. Wireless Charging Revenue Generation from Kansas Pavements [Technical Summary]. Report no. K-TRAN: KSU-22-7. Kansas State University. Transportation Center, 2025. https://rosap.ntl.bts.gov/view/dot/79629.
Aziz, H.M. Abdul Wireless Charging Revenue Generation from Kansas Pavements [Technical Summary]. Kansas State University. Transportation Center, 2025, Report no. K-TRAN: KSU-22-7, ROSA P. https://rosap.ntl.bts.gov/view/dot/79629.
This Phase II report builds on Phase I findings, further examining the application of the Low Power Wide Area Network (LPWAN) technologies in supporting transportation system operations and management. Phase I included a literature review to understand the current state of LPWAN applications and an online survey targeting transportation professiona
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Yang, H., Cetin, M., Shen, Y., Yan, Z., & Wang, J. (2025). Supporting Transportation System Management and Operations Using Internet of Things Technology: Phase II Field Tests (Report No. VTRC 25-R7). Virginia Transportation Research Council (VTRC). https://rosap.ntl.bts.gov/view/dot/79341
Yang, Hong, Mecit Cetin, Yuzhong Shen, Zizheng Yan, and Junqing Wang. Supporting Transportation System Management and Operations Using Internet of Things Technology: Phase II Field Tests. Report no. VTRC 25-R7. Virginia Transportation Research Council (VTRC), 2025. https://rosap.ntl.bts.gov/view/dot/79341.
Yang, Hong, et al. Supporting Transportation System Management and Operations Using Internet of Things Technology: Phase II Field Tests. Virginia Transportation Research Council (VTRC), 2025, Report no. VTRC 25-R7, ROSA P. https://rosap.ntl.bts.gov/view/dot/79341.
Incident management teams (IMTs) minimize crash impacts and create a safer highway network for people and communities. Research has shown that optimizing the IMT fleet has strong benefits to the roadway network, but future models indicate that increasing IMT presence may have diminishing returns after excessive roadway saturation. The Utah Departme
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Schultz, G. G., Hill, A. W., & Warner, N. G. (2025). Using Unmanned Aerial Systems to Facilitate Traffic Incident Management (Report No. UT–24.20). Utah. Dept. of Transportation. Division of Research. https://rosap.ntl.bts.gov/view/dot/79785
Schultz, Grant G., Adam W. Hill, and Nathan G. Warner. Using Unmanned Aerial Systems to Facilitate Traffic Incident Management. Report no. UT–24.20. Utah. Dept. of Transportation. Division of Research, 2025. https://rosap.ntl.bts.gov/view/dot/79785.
Schultz, Grant G., et al. Using Unmanned Aerial Systems to Facilitate Traffic Incident Management. Utah. Dept. of Transportation. Division of Research, 2025, Report no. UT–24.20, ROSA P. https://rosap.ntl.bts.gov/view/dot/79785.
United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Behavioral Safety Research
2025-01-01
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This Traffic Tech briefly summarizes the full report, Effects of Education on Speeding Behavior, examining the effect of speeding education on speeding behavior.
United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Behavioral Safety Research (2025). Effects of Education on Speeding [Traffic Tech] (Report No. DOT HS 813 652). United States. Department of Transportation. National Highway Traffic Safety Administration. https://rosap.ntl.bts.gov/view/dot/79107
United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Behavioral Safety Research. Effects of Education on Speeding [Traffic Tech]. Report no. DOT HS 813 652. United States. Department of Transportation. National Highway Traffic Safety Administration, 2025. https://rosap.ntl.bts.gov/view/dot/79107.
United States. Department of Transportation. National Highway Traffic Safety Administration. Office of Behavioral Safety Research Effects of Education on Speeding [Traffic Tech]. United States. Department of Transportation. National Highway Traffic Safety Administration, 2025, Report no. DOT HS 813 652, ROSA P. https://rosap.ntl.bts.gov/view/dot/79107.
Led by the Integrated Mobility Division (IMD), the North Carolina Department of Transportation (NCDOT)'s Connected Autonomous Shuttle Supporting Innovation (CASSI) is the state's flagship automated shuttle pilot program. CASSI introduces the public to automated vehicle technology through free shared rides and showcases how the technology works for
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Searcy, S., & Good, A. R. (2025). Connected Autonomous Shuttle Supporting Innovation (CASSI) Program Development. North Carolina. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/80392
Searcy, Sarah and Amanda R. Good. Connected Autonomous Shuttle Supporting Innovation (CASSI) Program Development. North Carolina. Department of Transportation, 2025. https://rosap.ntl.bts.gov/view/dot/80392.
Searcy, Sarah, and Amanda R. Good Connected Autonomous Shuttle Supporting Innovation (CASSI) Program Development. North Carolina. Department of Transportation, 2025, ROSA P. https://rosap.ntl.bts.gov/view/dot/80392.
The objective of this research project was to determine where, when, and why a prime or cure is needed for a pavement layer. Materials such as prime coats, curing materials, seal coats, and tack coats are typically considered nonstructural but integral to the pavement structure. Some materials can be used for multiple purposes, such as to prime, bo
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Goehl, D., Sebesta, S., Bierman, C., Liu, K. W., & Hsu, J. L. (2025). Best Practices for the Use of Prime in Texas Pavement Structures (Report No. FHWA/TX-24/0-7103-R1). Texas A&M Transportation Institute. https://rosap.ntl.bts.gov/view/dot/80595
Goehl, Darlene, Stephen Sebesta, Carl Bierman, Kai-Wei Liu, and Jia-Lin Hsu. Best Practices for the Use of Prime in Texas Pavement Structures. Report no. FHWA/TX-24/0-7103-R1. Texas A&M Transportation Institute, 2025. https://rosap.ntl.bts.gov/view/dot/80595.
Goehl, Darlene, et al. Best Practices for the Use of Prime in Texas Pavement Structures. Texas A&M Transportation Institute, 2025, Report no. FHWA/TX-24/0-7103-R1, ROSA P. https://rosap.ntl.bts.gov/view/dot/80595.
Indiana’s 2016 House Enrolled Act (HEA) 1001 provided a funding mechanism for transportation infrastructure that required Local Public Agencies (LPAs) to have an Asset Management Plan (AMP) to be eligible for funding. In 2022, the Indiana General Assembly desired to know the extent to which LPAs had adopted AMPs in response to this legislation. Thi
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Ajagu, R., Song, D., Holguin Mejia, D. O., Benny, D., Pourgholamali, M., Mwamba, I. C., Sinha, K. C., & Labi, S. (2025). Assessing the Asset Management Programs of Locals: Bridges and Pavement Conditions (Report No. FHWA/IN/JTRP-2025/02). Purdue University. Joint Transportation Research Program. https://rosap.ntl.bts.gov/view/dot/81797
Ajagu, Richard, Dongyoon Song, David O Holguin Mejia, Deepak Benny, Mohammadhosein Pourgholamali, Isaiah C Mwamba, Kumares C. Sinha, and Samuel Labi. Assessing the Asset Management Programs of Locals: Bridges and Pavement Conditions. Report no. FHWA/IN/JTRP-2025/02. Purdue University. Joint Transportation Research Program, 2025. https://rosap.ntl.bts.gov/view/dot/81797.
Ajagu, Richard, et al. Assessing the Asset Management Programs of Locals: Bridges and Pavement Conditions. Purdue University. Joint Transportation Research Program, 2025, Report no. FHWA/IN/JTRP-2025/02, ROSA P. https://rosap.ntl.bts.gov/view/dot/81797.
This report presents a guidebook for the management of environmental risk in the post-let phases of alternative delivery projects. Common challenges to environmental analysis and permitting are presented, in addition to a series of best practices and opportunities to promote efficient outcomes within the context of public-private partnerships, incl
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Kingsley, G., Ashuri, B., Whetsell, T., Hamilton, P., Choi, J. W., Kaufman, M., Broderick, K., Safikhanli, M., & Thu, M. (2025). Post-Let Environmental Analysis and Permitting for Alternative Delivery Projects (Report No. FHWA-GA-25-2224). Georgia. Department of Transportation. Office of Performance-Based Management & Research. https://rosap.ntl.bts.gov/view/dot/79323
Kingsley, Gordon, Baabak Ashuri, Travis Whetsell, Parker Hamilton, Jung Won Choi, Mira Kaufman, Kelsi Broderick, Mahammad Safikhanli, and Moe Thu. Post-Let Environmental Analysis and Permitting for Alternative Delivery Projects. Report no. FHWA-GA-25-2224. Georgia. Department of Transportation. Office of Performance-Based Management & Research, 2025. https://rosap.ntl.bts.gov/view/dot/79323.
Kingsley, Gordon, et al. Post-Let Environmental Analysis and Permitting for Alternative Delivery Projects. Georgia. Department of Transportation. Office of Performance-Based Management & Research, 2025, Report no. FHWA-GA-25-2224, ROSA P. https://rosap.ntl.bts.gov/view/dot/79323.
The objective of this project was to identify and compare suitable technologies that could provide cost-effective and reliable information about occupancy levels. The team assessed numerous technologies, including Wi-Fi, Bluetooth, infrared sensors, cameras, and crowd-sourced data.
Sun, Y., & Matthews, G. (2025). Evaluating and Validating Technology Options for Estimating Transit Vehicle Occupancy in Real Time [Summary] (Report No. BED30-977-03). Florida. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/79408
Sun, Yanshou and Gabrielle Matthews. Evaluating and Validating Technology Options for Estimating Transit Vehicle Occupancy in Real Time [Summary]. Report no. BED30-977-03. Florida. Department of Transportation, 2025. https://rosap.ntl.bts.gov/view/dot/79408.
Sun, Yanshou, and Gabrielle Matthews Evaluating and Validating Technology Options for Estimating Transit Vehicle Occupancy in Real Time [Summary]. Florida. Department of Transportation, 2025, Report no. BED30-977-03, ROSA P. https://rosap.ntl.bts.gov/view/dot/79408.
Tennessee does not currently have procedures or specification requirements that fully support the use of optimized gradations in concrete mixtures. This research project focused on optimizing aggregate gradation for concrete mixtures used by the Tennessee Department of Transportation (TDOT), aiming to improve concrete durability, economy, and susta
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Saykat, S., Napper, C., Abd-Elssamd, A., & Ma, Z. J. (2025). Optimized Aggregate Gradations for Concrete Mixture Designs (Report No. RES2023-16). Tennessee. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/80478
Saykat, Sazzadul, Caleb Napper, Ammar Abd-Elssamd, and Z John Ma. Optimized Aggregate Gradations for Concrete Mixture Designs. Report no. RES2023-16. Tennessee. Department of Transportation, 2025. https://rosap.ntl.bts.gov/view/dot/80478.
Saykat, Sazzadul, et al. Optimized Aggregate Gradations for Concrete Mixture Designs. Tennessee. Department of Transportation, 2025, Report no. RES2023-16, ROSA P. https://rosap.ntl.bts.gov/view/dot/80478.
Efficient road management requires collecting and analyzing various geospatial data related to transportation corridors. Mobile Mapping Systems (MMS), integrated with GNSS/INS units, RGB cameras, and LiDAR technology, enable the collection of geo-tagged imagery and 3D point cloud data across roadway networks. Acquired data helps in the inventory an
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Shin, S. Y., Kim, H., Goel, A., Jung, J., & Habib, A. (2025). Development of a Web Portal for the Management, Visualization, and Analysis of Collected Mobile LiDAR Data Along Indiana’s Transportation Corridors (Report No. FHWA/IN/JTRP-2025/05). Purdue University. Joint Transportation Research Program. https://doi.org/10.5703/1288284317846
Shin, Sang-Yeop, Hanjin Kim, Arnav Goel, Jinha Jung, and Ayman Habib. Development of a Web Portal for the Management, Visualization, and Analysis of Collected Mobile LiDAR Data Along Indiana’s Transportation Corridors. Report no. FHWA/IN/JTRP-2025/05. Purdue University. Joint Transportation Research Program, 2025. https://doi.org/10.5703/1288284317846.
Shin, Sang-Yeop, et al. Development of a Web Portal for the Management, Visualization, and Analysis of Collected Mobile LiDAR Data Along Indiana’s Transportation Corridors. Purdue University. Joint Transportation Research Program, 2025, Report no. FHWA/IN/JTRP-2025/05, ROSA P. https://doi.org/10.5703/1288284317846.
The objective of this research project was to develop a reliable method for estimating the in-pile grout volume of auger cast piles. The study also sought to standardize best practices to ensure compliance with Federal Highway Administration (FHWA) recommendations and State requirements.
Castellanos, J., Mullins, G., & Mee, T. (2025). Estimating the As-Placed Grout Volume of Auger Cast Piles – Part 1 [Summary] (Report No. BED25-977-04). Florida. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/80053
Castellanos, Juan, Gray Mullins, and Tristen Mee. Estimating the As-Placed Grout Volume of Auger Cast Piles – Part 1 [Summary]. Report no. BED25-977-04. Florida. Department of Transportation, 2025. https://rosap.ntl.bts.gov/view/dot/80053.
Castellanos, Juan, et al. Estimating the As-Placed Grout Volume of Auger Cast Piles – Part 1 [Summary]. Florida. Department of Transportation, 2025, Report no. BED25-977-04, ROSA P. https://rosap.ntl.bts.gov/view/dot/80053.
To date, most of this research has focused on understanding transportation insecurity at the national level. But there is likely wide variation in patterns of transportation insecurity by state, region, and city, with implications for policy. In this paper we examine what transportation insecurity looks like in Detroit. We do so by considering the
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Wileden, Lydia, and Alexandra K. Murphy Transportation Insecurity in the Motor City. University of Michigan, 2025, ROSA P. https://rosap.ntl.bts.gov/view/dot/89185.
This report presents the findings from focus groups conducted in 2024. The primary objective of the research was to provide a comprehensive analysis of the impact of Act 130 within Pennsylvania's unique context. The study examines the specific benefits and challenges of Highly Automated Vehicles (HAVs), with a focus on workforce development, econom
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Herrmann, D., Tobias, K., Pan, Y., Hu, X., Menon, N., Gayah, V., Guler, I., Ranjbari, A., & Qian, S. (2025). PennDOT Act 130 Reporting: Evaluating the Impact of Connected and Automated Vehicles to the Commonwealth of Pennsylvania (Report No. PSU WO 012). Pennsylvania. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/89151
Herrmann, Derrick, Kevin Tobias, Yuyan Pan, Xianbiao Hu, Nikhil Menon, Vikash Gayah, Ilgin Guler, Andisheh Ranjbari, and Sean Qian. PennDOT Act 130 Reporting: Evaluating the Impact of Connected and Automated Vehicles to the Commonwealth of Pennsylvania. Report no. PSU WO 012. Pennsylvania. Department of Transportation, 2025. https://rosap.ntl.bts.gov/view/dot/89151.
Herrmann, Derrick, et al. PennDOT Act 130 Reporting: Evaluating the Impact of Connected and Automated Vehicles to the Commonwealth of Pennsylvania. Pennsylvania. Department of Transportation, 2025, Report no. PSU WO 012, ROSA P. https://rosap.ntl.bts.gov/view/dot/89151.
2025 CCAT Global Symposium on mobility innovation.
Nie, Y. (., Murphy, A. K., Chen, Y., Dai, T., Kivestu, P., Bella, G., & Stathopoulos, A. (2025). Learning Transportation Insecurity from Mobile Phone Data. Northwestern University. https://rosap.ntl.bts.gov/view/dot/89263
Nie, Yu (Marco), Alexandra K. Murphy, Ying Chen, Tianxing Dai, Peeter Kivestu, Gretchen Bella, and Amanda Stathopoulos. Learning Transportation Insecurity from Mobile Phone Data. Northwestern University, 2025. https://rosap.ntl.bts.gov/view/dot/89263.
Nie, Yu (Marco), et al. Learning Transportation Insecurity from Mobile Phone Data. Northwestern University, 2025, ROSA P. https://rosap.ntl.bts.gov/view/dot/89263.
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