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.
Iowa has three classes of public roads: state primary highways, county (secondary) roads, and city streets. Among these, Iowa county roads serve rural Iowa transport needs by assuring a public road connection (i.e., to local access roads) for serving as conduits that channel the flow of people and commodities to and from towns and terminals (i.e.,
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Citir, N., Ceylan, H., Kim, S., Waid, D., Moore, B. P., & Cho, I. H. (2023). Pavement Structural Analysis Tool (PSAT) for Iowa Local Roads (Report No. IHRB Project TR-762). Iowa State University. Institute for Transportation. https://rosap.ntl.bts.gov/view/dot/68841
Citir, Nazik, Halil Ceylan, Sunghwan Kim, Danny Waid, Brian P Moore, and In-Ho Cho. Pavement Structural Analysis Tool (PSAT) for Iowa Local Roads. Report no. IHRB Project TR-762. Iowa State University. Institute for Transportation, 2023. https://rosap.ntl.bts.gov/view/dot/68841.
Citir, Nazik, et al. Pavement Structural Analysis Tool (PSAT) for Iowa Local Roads. Iowa State University. Institute for Transportation, 2023, Report no. IHRB Project TR-762, ROSA P. https://rosap.ntl.bts.gov/view/dot/68841.
This study developed a user-friendly tool that allows local agencies to understand the current structural capacities of their pavement assets, prioritize their preservation and rehabilitation needs, and make better-informed pavement infrastructure decisions.
Ceylan, H., Kim, S., Cho, I. H., Waid, D., Moore, B. P., & Citir, N. (2023). Development of Pavement Structural Analysis Tool (PSAT) for Iowa Local Roads [Summary]. Iowa State University. Institute for Transportation. https://rosap.ntl.bts.gov/view/dot/68840
Ceylan, Halil, Sunghwan Kim, In Ho Cho, Danny Waid, Brian P Moore, and Nazik Citir. Development of Pavement Structural Analysis Tool (PSAT) for Iowa Local Roads [Summary]. Iowa State University. Institute for Transportation, 2023. https://rosap.ntl.bts.gov/view/dot/68840.
Ceylan, Halil, et al. Development of Pavement Structural Analysis Tool (PSAT) for Iowa Local Roads [Summary]. Iowa State University. Institute for Transportation, 2023, ROSA P. https://rosap.ntl.bts.gov/view/dot/68840.
The Maryland Commuter Survey (MCS) is a new survey of adult workers in Maryland designed to measure annual trends in commuting and remote work. The 2022 MCS is its first iteration, providing baseline understanding of commuting rates and patterns as Maryland exits the COVID-19 pandemic. This survey and future iterations will shed light on topics inc
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The objectives of this research project were to test the visibility and recognition of ELMs with different color patterns and to conduct a performance test of the ELMs on an OGFC surface. This project also developed recommendations and specifications for ELMs on OGFC surfaces.
Byram, K., & Ali, H. (2023). Express Lane Marker Color Human Factors Study on Concrete and Open-Graded Friction Course [Summary]. Florida Department of Transportation. https://rosap.ntl.bts.gov/view/dot/75125
Byram, Karen and Hesham Ali. Express Lane Marker Color Human Factors Study on Concrete and Open-Graded Friction Course [Summary]. Florida Department of Transportation, 2023. https://rosap.ntl.bts.gov/view/dot/75125.
Byram, Karen, and Hesham Ali Express Lane Marker Color Human Factors Study on Concrete and Open-Graded Friction Course [Summary]. Florida Department of Transportation, 2023, ROSA P. https://rosap.ntl.bts.gov/view/dot/75125.
This research project involved the following: • Online survey: An online survey was conducted in this study to document the current state-of-the-practice by Ohio LPAs regarding the use of 404LVT asphalt mix design specifications. • Laboratory study: A laboratory testing plan was designed and implemented in this study to examine the effects of vario
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Abbas, A. R., Nazzal, M., Farash, M., Matouq, Y., Quasem, T., & Mansour, M. (2023). Optimizing the Performance of Item 404-Low Volume Traffic Mixes [Fact Sheet] (Report No. 114248). Ohio. Dept. of Transportation. Office of Research and Development. https://rosap.ntl.bts.gov/view/dot/73201
Abbas, Ala R., Munir Nazzal, Mohammad Farash, Younis Matouq, Tanvir Quasem, and Mustafa Mansour. Optimizing the Performance of Item 404-Low Volume Traffic Mixes [Fact Sheet]. Report no. 114248. Ohio. Dept. of Transportation. Office of Research and Development, 2023. https://rosap.ntl.bts.gov/view/dot/73201.
Abbas, Ala R., et al. Optimizing the Performance of Item 404-Low Volume Traffic Mixes [Fact Sheet]. Ohio. Dept. of Transportation. Office of Research and Development, 2023, Report no. 114248, ROSA P. https://rosap.ntl.bts.gov/view/dot/73201.
Most local public agencies (LPAs) in Ohio follow the Ohio Department of Transportation (ODOT) specifications for designing asphalt mixtures placed on low‐volume roads, with the majority of these agencies using Type 1 surface mixes prepared using PG 64‐22 asphalt binders. As an alternative, some LPAs use a mix known as 404LVT, which is a fine-graded
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Abbas, A. R., Nazzal, M., Farash, M., Matouq, Y., Quasem, T., & Mansour, M. (2023). Optimizing the Performance of Item 404-Low Volume Traffic Mixes (Report No. FHWA/OH-2022-32). Ohio. Dept. of Transportation. Office of Research and Development. https://rosap.ntl.bts.gov/view/dot/73170
Abbas, Ala R., Munir Nazzal, Mohammad Farash, Younis Matouq, Tanvir Quasem, and Mustafa Mansour. Optimizing the Performance of Item 404-Low Volume Traffic Mixes. Report no. FHWA/OH-2022-32. Ohio. Dept. of Transportation. Office of Research and Development, 2023. https://rosap.ntl.bts.gov/view/dot/73170.
Abbas, Ala R., et al. Optimizing the Performance of Item 404-Low Volume Traffic Mixes. Ohio. Dept. of Transportation. Office of Research and Development, 2023, Report no. FHWA/OH-2022-32, ROSA P. https://rosap.ntl.bts.gov/view/dot/73170.
The Inlet Protection Comparison for Sediment Control on Roadway Construction research project intends to provide Ohio Department of Transportation (ODOT) with performance data associated with key criteria for manufactured inlet protection devices in order to assess which products are appropriate for inlet sediment controls on ODOT roadway construct
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Tangirala, A., Kerns, J., Winston, R. J., Tirpak, A., & Grimm, A. (2023). Inlet Protection Comparison for Sediment Control on Roadway Construction [Fact Sheet]. Ohio. Department of Transportation. Office of Statewide Planning and Research. https://rosap.ntl.bts.gov/view/dot/73179
Tangirala, Anil, Justin Kerns, Ryan J Winston, Andrew Tirpak, and Alec Grimm. Inlet Protection Comparison for Sediment Control on Roadway Construction [Fact Sheet]. Ohio. Department of Transportation. Office of Statewide Planning and Research, 2023. https://rosap.ntl.bts.gov/view/dot/73179.
Tangirala, Anil, et al. Inlet Protection Comparison for Sediment Control on Roadway Construction [Fact Sheet]. Ohio. Department of Transportation. Office of Statewide Planning and Research, 2023, ROSA P. https://rosap.ntl.bts.gov/view/dot/73179.
Strength loss in high plasticity clay soils is a common occurrence along roadways in western and central Alabama and has considerable impact on pavement distress and slope failures. Approximately $16 million was spent to repair slope failures in western and central Alabama between 2005 and 2015 with many of these failures occurring in areas with hi
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Xuan, M., Montgomery, J., Anderson, B. J., & Kiernan, M. (2023). Characterizing Strength Loss in High Plasticity Clays along Alabama Highways (Report No. 930-988). Auburn University. Highway Research Center. https://rosap.ntl.bts.gov/view/dot/68341
Xuan, Mengwei, Jack Montgomery, Brian J Anderson, and Michael Kiernan. Characterizing Strength Loss in High Plasticity Clays along Alabama Highways. Report no. 930-988. Auburn University. Highway Research Center, 2023. https://rosap.ntl.bts.gov/view/dot/68341.
Xuan, Mengwei, et al. Characterizing Strength Loss in High Plasticity Clays along Alabama Highways. Auburn University. Highway Research Center, 2023, Report no. 930-988, ROSA P. https://rosap.ntl.bts.gov/view/dot/68341.
Each month the Department of Transportation releases an Air Travel Consumer Report that includes information about various service quality elements, including flight delays, mishandled baggage, over sales, and a variety of other types of consumer complaints. In response to an increasing number of inquiries from consumers about domestic airline pric
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United States. Department of Transportation (2023). Domestic Airline Fares Consumer Report: First Quarter 2006 Passenger and Fare Information. United States. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/76430
United States. Department of Transportation. Domestic Airline Fares Consumer Report: First Quarter 2006 Passenger and Fare Information. United States. Department of Transportation, 2023. https://rosap.ntl.bts.gov/view/dot/76430.
United States. Department of Transportation Domestic Airline Fares Consumer Report: First Quarter 2006 Passenger and Fare Information. United States. Department of Transportation, 2023, ROSA P. https://rosap.ntl.bts.gov/view/dot/76430.
The goal of this project was to explore the fuel efficiencies of SPaT broadcasts interacting with CVs to control speed along connected corridors. The findings from this investigation could then be used to inform possible future SPaT deployments.
Rowe, D., & Levin, M. W. (2023). Using Signal Phasing and Timing Data to Reduce Fuel Use [Technical Summary] (Report No. 2023-06). Minnesota. Department of Transportation. Office of Research & Innovation. https://rosap.ntl.bts.gov/view/dot/67167
Rowe, Daniel and Michael W. Levin. Using Signal Phasing and Timing Data to Reduce Fuel Use [Technical Summary]. Report no. 2023-06. Minnesota. Department of Transportation. Office of Research & Innovation, 2023. https://rosap.ntl.bts.gov/view/dot/67167.
Rowe, Daniel, and Michael W. Levin Using Signal Phasing and Timing Data to Reduce Fuel Use [Technical Summary]. Minnesota. Department of Transportation. Office of Research & Innovation, 2023, Report no. 2023-06, ROSA P. https://rosap.ntl.bts.gov/view/dot/67167.
This report summarizes the results of a research task that was conducted to document the Ohio Department of Transportation (ODOT) current state-of-the-practice for crack sealing, identify best practices used or researched by state DOTs for crack sealing, and identify new methods and equipment for crack sealing that can improve the efficiency, respo
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Nazzal, M. D., Abbas, A. R., Berner, C., & Swaleh, S. (2023). District Highway Maintenance Research On-Call (ROC) 2023-09- Task 1: Evaluation of the Use Robotic Systems for Improving Crack Sealing Process (Report No. FHWA/OH-2023-07). Ohio. Dept. of Transportation. https://rosap.ntl.bts.gov/view/dot/73200
Nazzal, Munir D, Ala R. Abbas, Chris Berner, and Safaa Swaleh. District Highway Maintenance Research On-Call (ROC) 2023-09- Task 1: Evaluation of the Use Robotic Systems for Improving Crack Sealing Process. Report no. FHWA/OH-2023-07. Ohio. Dept. of Transportation, 2023. https://rosap.ntl.bts.gov/view/dot/73200.
Nazzal, Munir D, et al. District Highway Maintenance Research On-Call (ROC) 2023-09- Task 1: Evaluation of the Use Robotic Systems for Improving Crack Sealing Process. Ohio. Dept. of Transportation, 2023, Report no. FHWA/OH-2023-07, ROSA P. https://rosap.ntl.bts.gov/view/dot/73200.
Given the novelty of the Flashing Yellow Arrow (FYA) in Massachusetts, this research study provides MassDOT with a greater understanding of their impacts from an approach-level perspective. More so, this study provides the agency with a holistic overview of infrastructure and operational impacts at each of these intersections, ultimately leading to
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Tainter, F., Fitzpatrick, C., & Hannon, T. (2023). Evaluating the Safety Impacts of Flashing Yellow Permissive Left-Turn Indications in Massachusetts: Approach-Level Analysis (Report No. 23-036). Massachusetts. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/67221
Tainter, Francis, Cole Fitzpatrick, and Thomas Hannon. Evaluating the Safety Impacts of Flashing Yellow Permissive Left-Turn Indications in Massachusetts: Approach-Level Analysis. Report no. 23-036. Massachusetts. Department of Transportation, 2023. https://rosap.ntl.bts.gov/view/dot/67221.
Tainter, Francis, et al. Evaluating the Safety Impacts of Flashing Yellow Permissive Left-Turn Indications in Massachusetts: Approach-Level Analysis. Massachusetts. Department of Transportation, 2023, Report no. 23-036, ROSA P. https://rosap.ntl.bts.gov/view/dot/67221.
This research identifies opportunities to enhance revenue including yield management, creative fare schemes and campaigns, partnerships attractions and institutions. As part of this effort, the authors interviewed overseas rail operators to provide examples of revenue enhancement as well as operators such as Brightline and Amtrak to identify exampl
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Waldt, P., Atallah, S., Hartman, R. J., & Watson, T. (2023). Methods for Increasing Missouri’s Passenger Rail Business Revenues (Report No. cmr 23-006). Missouri. Department of Transportation. Construction and Materials Division. https://rosap.ntl.bts.gov/view/dot/66997
Waldt, Peter, Stephanie Atallah, Ronald J. Hartman, and Tim Watson. Methods for Increasing Missouri’s Passenger Rail Business Revenues. Report no. cmr 23-006. Missouri. Department of Transportation. Construction and Materials Division, 2023. https://rosap.ntl.bts.gov/view/dot/66997.
Waldt, Peter, et al. Methods for Increasing Missouri’s Passenger Rail Business Revenues. Missouri. Department of Transportation. Construction and Materials Division, 2023, Report no. cmr 23-006, ROSA P. https://rosap.ntl.bts.gov/view/dot/66997.
This research is focused on updating the New Jersey Department of Transportation (NJDOT) Statewide Capital Investment Strategy (SCIS), which outlines NJDOT’s strategy to comprehensively invest in deficiencies and improvements to address statewide system goals. The update of the SCIS is a requirement under the Transportation Trust Fund Authority Act
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Patel, A., & Ukpah, P. (2023). Statewide Capital Investment Strategy and Update (Report No. NJ-2023-002). New Jersey. Department of Transportation. Bureau of Research. https://rosap.ntl.bts.gov/view/dot/68836
Patel, Alpesh and Priscilla Ukpah. Statewide Capital Investment Strategy and Update. Report no. NJ-2023-002. New Jersey. Department of Transportation. Bureau of Research, 2023. https://rosap.ntl.bts.gov/view/dot/68836.
Patel, Alpesh, and Priscilla Ukpah Statewide Capital Investment Strategy and Update. New Jersey. Department of Transportation. Bureau of Research, 2023, Report no. NJ-2023-002, ROSA P. https://rosap.ntl.bts.gov/view/dot/68836.
Historically, apart from a very limited number of specifically authorized exceptions, WisDOT has been required to utilize the design-bid-build method of project delivery. Over the years, several studies have been undertaken, and proposals made, to expand the department’s authority to utilize alternative methods of project delivery, including design
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Qin, X., & Gottlieb, M. (2023). Pilot Design Build Program Evaluation [Research Brief] (Report No. Project 0092-22-68). Wisconsin. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/67835
Qin, Xiao and Mark Gottlieb. Pilot Design Build Program Evaluation [Research Brief]. Report no. Project 0092-22-68. Wisconsin. Department of Transportation, 2023. https://rosap.ntl.bts.gov/view/dot/67835.
Qin, Xiao, and Mark Gottlieb Pilot Design Build Program Evaluation [Research Brief]. Wisconsin. Department of Transportation, 2023, Report no. Project 0092-22-68, ROSA P. https://rosap.ntl.bts.gov/view/dot/67835.
The goal of the Safe Corridor Program is to identify corridors with high rates of serious and fatal injury crashes and reduce these crashes in the short-term through the use enforcement and engineering. Both components contribute to the goal of reducing serious injury crashes by encouraging drivers to change poor behaviors within safety corridors a
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Hopwood, C., Motamed, M., & Ni, X. (2023). Updating 2019 Safe Corridors Reports [Technical Brief] (Report No. NJ-2023-003). New Jersey. Department of Transportation. Bureau of Research. https://rosap.ntl.bts.gov/view/dot/68061
Hopwood, Cory, Megan Motamed, and Xuenan Ni. Updating 2019 Safe Corridors Reports [Technical Brief]. Report no. NJ-2023-003. New Jersey. Department of Transportation. Bureau of Research, 2023. https://rosap.ntl.bts.gov/view/dot/68061.
Hopwood, Cory, et al. Updating 2019 Safe Corridors Reports [Technical Brief]. New Jersey. Department of Transportation. Bureau of Research, 2023, Report no. NJ-2023-003, ROSA P. https://rosap.ntl.bts.gov/view/dot/68061.
Intelligent compaction (IC) is a roller-based innovative technology that provides real-time compaction monitoring and control. IC can monitor roller passes, vibration frequencies/amplitudes, and stiffness-related values of compacted materials or intelligent compaction measurement Values (ICMV). Various ICMVs have been introduced since 1978. Based o
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Chang, G. K., TaghaviGhalesari, A., Gilliland, A., Nazarian, S., Tirado, C., & Rocha, S. (2023). Evaluation of Level 3-4 Intelligent Compaction Measurement Values (ICMV) for Soils Subgrade and Aggregate Subbase Compaction (Report No. NRRA202304). National Road Research Alliance. https://rosap.ntl.bts.gov/view/dot/67892
Chang, George K, Abbas TaghaviGhalesari, Amanda Gilliland, Soheil Nazarian, Cesar Tirado, and Sergio Rocha. Evaluation of Level 3-4 Intelligent Compaction Measurement Values (ICMV) for Soils Subgrade and Aggregate Subbase Compaction. Report no. NRRA202304. National Road Research Alliance, 2023. https://rosap.ntl.bts.gov/view/dot/67892.
Chang, George K, et al. Evaluation of Level 3-4 Intelligent Compaction Measurement Values (ICMV) for Soils Subgrade and Aggregate Subbase Compaction. National Road Research Alliance, 2023, Report no. NRRA202304, ROSA P. https://rosap.ntl.bts.gov/view/dot/67892.
The project and risk management policies and strategies used by other DOTs in the country were evaluated. The purpose is to gain insight into how they measure and manage project development and delivery, and ultimately obtain ideas to improve ODOT’s own project management methods.
Aros-Vera, F. (2023). Division of Planning Research On-Call (ROC) Task#12 - Survey of Risk Management Policies for Transportation Agencies (Report No. FHWA/OH-2023-01). Ohio. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/72882
Aros-Vera, Felipe. Division of Planning Research On-Call (ROC) Task#12 - Survey of Risk Management Policies for Transportation Agencies. Report no. FHWA/OH-2023-01. Ohio. Department of Transportation, 2023. https://rosap.ntl.bts.gov/view/dot/72882.
Aros-Vera, Felipe Division of Planning Research On-Call (ROC) Task#12 - Survey of Risk Management Policies for Transportation Agencies. Ohio. Department of Transportation, 2023, Report no. FHWA/OH-2023-01, ROSA P. https://rosap.ntl.bts.gov/view/dot/72882.
In previous research, investigators developed and deployed two warning systems, including MN-QWARN, which was installed on a segment of Interstate 94 (I-94) with a historically high crash rate. This system targeted shockwaves or initial stages of congestion based on the understanding that not all congestion events create high risks for crashes. Cer
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Hourdos, J. (2023). Improving and Expanding the Queue Warning System (Report No. 2023-05TS). Minnesota. Department of Transportation. Office of Research & Innovation. https://rosap.ntl.bts.gov/view/dot/67834
Hourdos, John. Improving and Expanding the Queue Warning System. Report no. 2023-05TS. Minnesota. Department of Transportation. Office of Research & Innovation, 2023. https://rosap.ntl.bts.gov/view/dot/67834.
Hourdos, John Improving and Expanding the Queue Warning System. Minnesota. Department of Transportation. Office of Research & Innovation, 2023, Report no. 2023-05TS, ROSA P. https://rosap.ntl.bts.gov/view/dot/67834.
The primary objectives of this study are to develop a detector performance monitoring system for both off-line and on-line applications, and to implement such a system for the Eastern Shore region’s current and proposed sensors, including: evaluate the data quality and reliability of the six sensors deployed in the Eastern Shore region; assess the
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Lin, Y. T., Chen, Y. H., Huang, Y. L., Cheng, Y., & Chan, G. L. (2023). Off-line and Real-time Evaluations of Eastern-Shore Sensors With a Generalized Detection Performance Monitoring System (Report No. SPR- Part B MD-23-SHA/UM/6-8). Maryland. Dept. of Transportation. https://rosap.ntl.bts.gov/view/dot/66973
Lin, Yi-Ting, Yen-Hsiang Chen, Yen-Lin Huang, Yao Cheng, and Gang-Len Chan. Off-line and Real-time Evaluations of Eastern-Shore Sensors With a Generalized Detection Performance Monitoring System. Report no. SPR- Part B MD-23-SHA/UM/6-8. Maryland. Dept. of Transportation, 2023. https://rosap.ntl.bts.gov/view/dot/66973.
Lin, Yi-Ting, et al. Off-line and Real-time Evaluations of Eastern-Shore Sensors With a Generalized Detection Performance Monitoring System. Maryland. Dept. of Transportation, 2023, Report no. SPR- Part B MD-23-SHA/UM/6-8, ROSA P. https://rosap.ntl.bts.gov/view/dot/66973.
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