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.
Traffic calming features improve conditions for non-motorized modes of travel such as walking and biking. Physical changes to the roadway can create an environment that naturally slows traffic and increases pedestrian visibility in the immediate vicinity (Federal Highway Administration, 2016). Beyond injury and crash prevention, additional benefits
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MacFarlane, J. (2022). Primer Pop-Up Traffic Calming & Placemaking (Report No. 4W8403). Montana State University. Western Transportation Institute. https://rosap.ntl.bts.gov/view/dot/78447
MacFarlane, Jennifer. Primer Pop-Up Traffic Calming & Placemaking. Report no. 4W8403. Montana State University. Western Transportation Institute, 2022. https://rosap.ntl.bts.gov/view/dot/78447.
MacFarlane, Jennifer Primer Pop-Up Traffic Calming & Placemaking. Montana State University. Western Transportation Institute, 2022, Report no. 4W8403, ROSA P. https://rosap.ntl.bts.gov/view/dot/78447.
This report combines a cost baseline analysis with five case studies of California rail projects (four local transit projects and California’s High-Speed Rail project) to identify the causes of high project costs, slow deployment, and overruns/delays beyond initial project estimates. Baselines were developed from an analysis of two prominent transi
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Elkind, E. N., Segal, K., Lamm, T., & Maroulis, M. (2022). Getting Back on Track: Policy Solutions to Improve California Rail Transit Projects (Report No. UC-ITS-2021-22). University of California Institute of Transportation Studies. http://doi.org/10.7922/G2V986CM
Elkind, Ethan N, Katie Segal, Ted Lamm, and Michael Maroulis. Getting Back on Track: Policy Solutions to Improve California Rail Transit Projects. Report no. UC-ITS-2021-22. University of California Institute of Transportation Studies, 2022. http://doi.org/10.7922/G2V986CM.
Elkind, Ethan N, et al. Getting Back on Track: Policy Solutions to Improve California Rail Transit Projects. University of California Institute of Transportation Studies, 2022, Report no. UC-ITS-2021-22, ROSA P. http://doi.org/10.7922/G2V986CM.
This dissertation presents several aspects of short-notice wildfire evacuation, using empirical findings from the 2018 Camp Fire in Butte County, California. I examine the manner and timing in which people find out about and begin evacuating in a short notice wildfire. Using these findings, I build a simulation model of such a disaster, and examine
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Grajdura, S. A. (2022). Mixed Methods Approaches to Wildfire Evacuation: Modeling Behavior, Simulation, and Equity. University of California, Davis. https://rosap.ntl.bts.gov/view/dot/72581
Grajdura, Sarah Allison. Mixed Methods Approaches to Wildfire Evacuation: Modeling Behavior, Simulation, and Equity. University of California, Davis, 2022. https://rosap.ntl.bts.gov/view/dot/72581.
Grajdura, Sarah Allison Mixed Methods Approaches to Wildfire Evacuation: Modeling Behavior, Simulation, and Equity. University of California, Davis, 2022, ROSA P. https://rosap.ntl.bts.gov/view/dot/72581.
Chloride deicers have been applied by the Oregon Department of Transportation (ODOT) to Interstate Route 5 (I–5) from the Oregon-California border north to mile marker 10 for several years in the high-elevation area known as the Siskiyou Pass. Magnesium chloride (MgCl2) and sodium chloride (NaCl) are applied to keep the interstate highway safe for
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Stonewall, A. J., Yates, M. C., & Granato, G. E. (2022). Assessing the Impact of Chloride Deicer Application in the Siskiyou Pass, Southern Oregon (Report No. 2022–5091). United States. Geological Survey (USGS). https://doi.org/10.3133/sir20225091
Stonewall, Adam J, Matthew C Yates, and Gregory E. Granato. Assessing the Impact of Chloride Deicer Application in the Siskiyou Pass, Southern Oregon. Report no. 2022–5091. United States. Geological Survey (USGS), 2022. https://doi.org/10.3133/sir20225091.
Stonewall, Adam J, et al. Assessing the Impact of Chloride Deicer Application in the Siskiyou Pass, Southern Oregon. United States. Geological Survey (USGS), 2022, Report no. 2022–5091, ROSA P. https://doi.org/10.3133/sir20225091.
Promising advances in autonomous vehicle (AV) technology have fueled industry and research fields to dedicate significant efforts to the study of the integration of AVs into the traffic network. While most studies anticipate a beneficial role of AVs, contributing to improved traffic efficiency and roadway safety, the underlying assumptions on the i
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Hunter, M., Guin, A., Saroj, A., & Bae, J. I. (2022). Development of Tools to Model Driver Behavior in a Cooperative and Driverless Vehicle Mixed Roadway Environment (Report No. FHWA-GA-22-18-23). Georgia. Department of Transportation. Office of Performance-Based Management & Research. https://rosap.ntl.bts.gov/view/dot/61620
Hunter, Michael, Angshuman Guin, Abhilasha Saroj, and Jong In Bae. Development of Tools to Model Driver Behavior in a Cooperative and Driverless Vehicle Mixed Roadway Environment. Report no. FHWA-GA-22-18-23. Georgia. Department of Transportation. Office of Performance-Based Management & Research, 2022. https://rosap.ntl.bts.gov/view/dot/61620.
Hunter, Michael, et al. Development of Tools to Model Driver Behavior in a Cooperative and Driverless Vehicle Mixed Roadway Environment. Georgia. Department of Transportation. Office of Performance-Based Management & Research, 2022, Report no. FHWA-GA-22-18-23, ROSA P. https://rosap.ntl.bts.gov/view/dot/61620.
Culverts can be an impediment to fish passage, impacting fish populations and spawning of both migratory and non-migratory species. With increased opportunities to invest in both water resources and infrastructure, prioritizing and selecting potential locations for culvert replacement to remove fish barriers is timely. In this project, we engaged w
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Daniels, N. K., Bowman, J., Sullivan, N., Mackey, A., Che, D., & Sapkota, B. (2022). Division of Planning Research On-Call Task#8 - Assessment and Prioritization of Culverts for Enhanced Fish Passage (Report No. FHWA/OH-2022-05). Ohio. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/72884
Daniels, Natalie Kruse, Jen Bowman, Nora Sullivan, Amy Mackey, Daniel Che, and Binay Sapkota. Division of Planning Research On-Call Task#8 - Assessment and Prioritization of Culverts for Enhanced Fish Passage. Report no. FHWA/OH-2022-05. Ohio. Department of Transportation, 2022. https://rosap.ntl.bts.gov/view/dot/72884.
Daniels, Natalie Kruse, et al. Division of Planning Research On-Call Task#8 - Assessment and Prioritization of Culverts for Enhanced Fish Passage. Ohio. Department of Transportation, 2022, Report no. FHWA/OH-2022-05, ROSA P. https://rosap.ntl.bts.gov/view/dot/72884.
Thermal Integrity Profiling (TIP) methods have emerged as a viable concrete integrity test method alternative to crosshole sonic logging (CSL). The objective of this study was to evaluate TIP methods for potential implementation on MoDOT drilled shaft projects. The study included a review of experience from previous research and project application
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Boeckmann, A., Yeskoo, R. A., & Axtell, P. (2022). Use of Thermal Integrity Profiling (TIP) in Drilled Shaft Evaluation (Report No. cmr 22-002). Missouri. Department of Transportation. Construction and Materials Division. https://rosap.ntl.bts.gov/view/dot/60851
Boeckmann, Andrew, R Andrew Yeskoo, and Paul Axtell. Use of Thermal Integrity Profiling (TIP) in Drilled Shaft Evaluation. Report no. cmr 22-002. Missouri. Department of Transportation. Construction and Materials Division, 2022. https://rosap.ntl.bts.gov/view/dot/60851.
Boeckmann, Andrew, et al. Use of Thermal Integrity Profiling (TIP) in Drilled Shaft Evaluation. Missouri. Department of Transportation. Construction and Materials Division, 2022, Report no. cmr 22-002, ROSA P. https://rosap.ntl.bts.gov/view/dot/60851.
The U.S. Department of Transportation (USDOT or Department) is committed to pursuing a comprehensive approach to advancing equity for all. In response to Executive Order 13985: Advancing Racial Equity and Support for Underserved Communities Through the Federal Government, this Equity Action Plan highlights key actions that USDOT will undertake to e
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United States. Department of Transportation (2022). U.S. Department of Transportation Equity Action Plan. United States. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/66378
United States. Department of Transportation. U.S. Department of Transportation Equity Action Plan. United States. Department of Transportation, 2022. https://rosap.ntl.bts.gov/view/dot/66378.
United States. Department of Transportation U.S. Department of Transportation Equity Action Plan. United States. Department of Transportation, 2022, ROSA P. https://rosap.ntl.bts.gov/view/dot/66378.
This report details the implementation of a wireless structural monitoring and bridge weigh-in-motion system. The goal of the project is to develop, install, and maintain a wireless structural monitoring system to perform long-term bridge weigh-in-motion. The developed system adopts the Martlet wireless sensing system for data collection and monito
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Bolander, P., & Wang, Y. (2022). Continuous Field Validation of a Wireless Structural Monitoring and Bridge Weigh-in-Motion (BWIM) System (Report No. FHWA-GA-22-1827). Georgia. Department of Transportation. Office of Performance-Based Management & Research. https://rosap.ntl.bts.gov/view/dot/61162
Bolander, Peter and Yang Wang. Continuous Field Validation of a Wireless Structural Monitoring and Bridge Weigh-in-Motion (BWIM) System. Report no. FHWA-GA-22-1827. Georgia. Department of Transportation. Office of Performance-Based Management & Research, 2022. https://rosap.ntl.bts.gov/view/dot/61162.
Bolander, Peter, and Yang Wang Continuous Field Validation of a Wireless Structural Monitoring and Bridge Weigh-in-Motion (BWIM) System. Georgia. Department of Transportation. Office of Performance-Based Management & Research, 2022, Report no. FHWA-GA-22-1827, ROSA P. https://rosap.ntl.bts.gov/view/dot/61162.
2022-01-01
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Domestic Airline Fares Consumer Report
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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 (2022). Domestic Airline Fares Consumer Report: Third Quarter 2021 Passenger and Fare Information. United States. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/75807
United States. Department of Transportation. Domestic Airline Fares Consumer Report: Third Quarter 2021 Passenger and Fare Information. United States. Department of Transportation, 2022. https://rosap.ntl.bts.gov/view/dot/75807.
United States. Department of Transportation Domestic Airline Fares Consumer Report: Third Quarter 2021 Passenger and Fare Information. United States. Department of Transportation, 2022, ROSA P. https://rosap.ntl.bts.gov/view/dot/75807.
There is limited research on the effects of variable message sign (VMS) message content on revealed driver behavior. This study investigated the associations of message content with diversion rate during crash incidents using 5 years of VMS message history within a section of I-15 in the state of Utah. The diversion rate was found to be higher when
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Acharya, S., & Mekker, M. (2022). Evaluating the Impact of Detour Messaging on Actual Driver Detour Behavior (Report No. UT-21.31). Utah. Dept. of Transportation. Research Division. https://rosap.ntl.bts.gov/view/dot/61158
Acharya, Sailesh and Michelle Mekker. Evaluating the Impact of Detour Messaging on Actual Driver Detour Behavior. Report no. UT-21.31. Utah. Dept. of Transportation. Research Division, 2022. https://rosap.ntl.bts.gov/view/dot/61158.
Acharya, Sailesh, and Michelle Mekker Evaluating the Impact of Detour Messaging on Actual Driver Detour Behavior. Utah. Dept. of Transportation. Research Division, 2022, Report no. UT-21.31, ROSA P. https://rosap.ntl.bts.gov/view/dot/61158.
Workshop on Implementation of Portable Weigh in Motion (WIM) Technology on Texas Highways.
Texas A&M Transportation Institute (2022). Implementation of Portable Weigh-in-Motion (WIM) Technology on Texas Highways: Workshop (Report No. Project 5 6940 01). Texas A&M Transportation Institute. https://rosap.ntl.bts.gov/view/dot/64296
Texas A&M Transportation Institute. Implementation of Portable Weigh-in-Motion (WIM) Technology on Texas Highways: Workshop. Report no. Project 5 6940 01. Texas A&M Transportation Institute, 2022. https://rosap.ntl.bts.gov/view/dot/64296.
Texas A&M Transportation Institute Implementation of Portable Weigh-in-Motion (WIM) Technology on Texas Highways: Workshop. Texas A&M Transportation Institute, 2022, Report no. Project 5 6940 01, ROSA P. https://rosap.ntl.bts.gov/view/dot/64296.
Resilient modulus (MR) is a key factor in the Mechanistic Empirical Pavement Design Guide (MEPDG) which was adopted by INDOT in January 2009. The resilient modulus can be determined in new pavement projects from subgrade soil samples collected at the site. However, for a pavement rehabilitation project, it becomes difficult to obtain soil informati
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Gupta, K., Park, S. S., Bobet, A., & Nantung, T. (2022). Improved Reliability of FWD Test Results and Correlations With Resilient Modulus (Report No. FHWA/IN/JTRP-2022/07). Purdue University. Joint Transportation Research Program. https://doi.org/10.5703/1288284317370
Gupta, Kanika, Sung Soo Park, Antonio Bobet, and Tommy Nantung. Improved Reliability of FWD Test Results and Correlations With Resilient Modulus. Report no. FHWA/IN/JTRP-2022/07. Purdue University. Joint Transportation Research Program, 2022. https://doi.org/10.5703/1288284317370.
Gupta, Kanika, et al. Improved Reliability of FWD Test Results and Correlations With Resilient Modulus. Purdue University. Joint Transportation Research Program, 2022, Report no. FHWA/IN/JTRP-2022/07, ROSA P. https://doi.org/10.5703/1288284317370.
Nine test sites across the state of Oklahoma were investigated using the Seismic Cone Penetration Test with pore water pressure measurement (SCPTu). Field testing was conducted during wet and dry periods to observe the effect of moisture conditions on the data collected from the field. Disturbed and undisturbed samples were collected at each site t
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Miller, G. A., Abuawad, T. Z., & Nevels, J. (2022). Demonstration of the Applicability of the New CPTU/SCPTU Correlations With Soil Parameter Evaluation (Report No. FHWA-OK-22-01). Oklahoma. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/67199
Miller, Gerald A., Tareq Z Abuawad, and James Nevels. Demonstration of the Applicability of the New CPTU/SCPTU Correlations With Soil Parameter Evaluation. Report no. FHWA-OK-22-01. Oklahoma. Department of Transportation, 2022. https://rosap.ntl.bts.gov/view/dot/67199.
Miller, Gerald A., et al. Demonstration of the Applicability of the New CPTU/SCPTU Correlations With Soil Parameter Evaluation. Oklahoma. Department of Transportation, 2022, Report no. FHWA-OK-22-01, ROSA P. https://rosap.ntl.bts.gov/view/dot/67199.
Interest in hydrogen as a clean source of energy has grown considerably over the past decade. With its ambitious climate goals and a vibrant economy, California looks poised to become one of the major hydrogen hubs in the country. However, insufficient infrastructure to support demand and lack of economies of scale, are critical factors that have i
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Vijayakumar, V. (2022). Understanding the Evolution of Hydrogen Supply Chains in the Western United States: An Optimization-Based Approach Focusing on California as a Future Hydrogen Hub. University of California, Davis. https://rosap.ntl.bts.gov/view/dot/73766
Vijayakumar, Vishnu. Understanding the Evolution of Hydrogen Supply Chains in the Western United States: An Optimization-Based Approach Focusing on California as a Future Hydrogen Hub. University of California, Davis, 2022. https://rosap.ntl.bts.gov/view/dot/73766.
Vijayakumar, Vishnu Understanding the Evolution of Hydrogen Supply Chains in the Western United States: An Optimization-Based Approach Focusing on California as a Future Hydrogen Hub. University of California, Davis, 2022, ROSA P. https://rosap.ntl.bts.gov/view/dot/73766.
Individuals who walk and cycle experience a variety of health and economic benefits while simultaneously benefiting their local environments and communities. It is essential to correctly obtain pedestrian and bicyclist counts for better design and planning of active transportation-related facilities. In recent years, crowdsourcing has seen a rise i
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Cheng, W., Zhang, Y., & Clay, E. (2022). Comprehensive Performance Assessment of Passive Crowdsourcing for Counting Pedestrians and Bikes (Report No. 22-03, CA-MTI-2025). Mineta Transportation Institute. https://doi.org/10.31979/mti.2022.2025
Cheng, Wen, Yongping Zhang, and Edward Clay. Comprehensive Performance Assessment of Passive Crowdsourcing for Counting Pedestrians and Bikes. Report no. 22-03, CA-MTI-2025. Mineta Transportation Institute, 2022. https://doi.org/10.31979/mti.2022.2025.
Cheng, Wen, et al. Comprehensive Performance Assessment of Passive Crowdsourcing for Counting Pedestrians and Bikes. Mineta Transportation Institute, 2022, Report no. 22-03, CA-MTI-2025, ROSA P. https://doi.org/10.31979/mti.2022.2025.
Concrete for pavements must be proportioned so that the concrete is economical and durable. Because ordinary Portland cement (OPC) is the most costly component and is generally less durable than the aggregates, the OPC should be minimized. OPC significantly contributes to CO₂ during manufacturing. Therefore, minimizing the OPC will also make the co
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Trejo, D., Vaddey, N. P., Vasudevan, G. D., Isgor, O. B., & Amirkhanian, A. N. (2022). Constructability and Durability of Concrete Pavements (Report No. FHWA-OR-RD-22-10). Oregon Department of Transportation. Research Section. https://rosap.ntl.bts.gov/view/dot/60654
Trejo, David, Naga Pavan Vaddey, Gokul Dev Vasudevan, O Burkan Isgor, and Armen N. Amirkhanian. Constructability and Durability of Concrete Pavements. Report no. FHWA-OR-RD-22-10. Oregon Department of Transportation. Research Section, 2022. https://rosap.ntl.bts.gov/view/dot/60654.
Trejo, David, et al. Constructability and Durability of Concrete Pavements. Oregon Department of Transportation. Research Section, 2022, Report no. FHWA-OR-RD-22-10, ROSA P. https://rosap.ntl.bts.gov/view/dot/60654.
Work zones are an essential component of any state transportation agency’s construction and maintenance operations. As such, agencies apply numerous practices in order to keep their workers safe during construction operations. These strategies typically fall under the following categories: work zone traffic control (e.g., arrow boards, variable mes
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Ash, J. E., Ma, J., Tang, M., & Wang, J. (2022). Assess the Effectiveness of Type 2 and Type 3 Safety Vests for Day and Night Use – Phase 2 (Report No. FHWA/OH-2022-02). Ohio. Dept. of Transportation. https://rosap.ntl.bts.gov/view/dot/73238
Ash, John E, Jiaqi Ma, Ming Tang, and Julian Wang. Assess the Effectiveness of Type 2 and Type 3 Safety Vests for Day and Night Use – Phase 2. Report no. FHWA/OH-2022-02. Ohio. Dept. of Transportation, 2022. https://rosap.ntl.bts.gov/view/dot/73238.
Ash, John E, et al. Assess the Effectiveness of Type 2 and Type 3 Safety Vests for Day and Night Use – Phase 2. Ohio. Dept. of Transportation, 2022, Report no. FHWA/OH-2022-02, ROSA P. https://rosap.ntl.bts.gov/view/dot/73238.
An increase in pile resistance over time after installation, due to an increase in soil resistance, is referred to as pile setup. Until recently, pile setup was not commonly considered in ODOT’s standard driven pile design procedures. If substantial pile driving losses are encountered during pile installation, then either pile driving is stopped fo
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Bilgin, �., Alzahrani, S., Narsavage, P., Nusairat, J., & DiMaggio, J. A. (2022). Pile Driving Setup for Ohio Soils: Final Report (Report No. FHWA/OH-2022-09). Ohio. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/72891
Bilgin, Ömer, Saeed Alzahrani, Peter Narsavage, Jamal Nusairat, and Jerry A. DiMaggio. Pile Driving Setup for Ohio Soils: Final Report. Report no. FHWA/OH-2022-09. Ohio. Department of Transportation, 2022. https://rosap.ntl.bts.gov/view/dot/72891.
Bilgin, Ömer, et al. Pile Driving Setup for Ohio Soils: Final Report. Ohio. Department of Transportation, 2022, Report no. FHWA/OH-2022-09, ROSA P. https://rosap.ntl.bts.gov/view/dot/72891.
Nearly every aspect of social, economic, and political life in California is linked by its transportation systems. These systems can be seamless and somewhat transparent when they work well, but their failings can be glaring and deeply problematic when they leave people, goods, or places behind. Debates over how to address the state’s long-standing
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Wasserman, J. L., Taylor, B. D., Gahbauer, J., Mutate, J., Garrett, M., Ding, H., Pinski, M., Rios Gutierrez, N., & Rios Gutierrez, A. (2022). The Future of Transportation and Urban Planning: A California 100 Report on Policies and Future Scenarios. University of California, Los Angeles. Institute of Transportation Studies. https://doi.org/10.13140/RG.2.2.10404.24966
Wasserman, Jacob L., Brian D. Taylor, John Gahbauer, Juan Mutate, Mark Garrett, Hao Ding, Miriam Pinski, Nataly Rios Gutierrez, and Alejandra Rios Gutierrez. The Future of Transportation and Urban Planning: A California 100 Report on Policies and Future Scenarios. University of California, Los Angeles. Institute of Transportation Studies, 2022. https://doi.org/10.13140/RG.2.2.10404.24966.
Wasserman, Jacob L., et al. The Future of Transportation and Urban Planning: A California 100 Report on Policies and Future Scenarios. University of California, Los Angeles. Institute of Transportation Studies, 2022, ROSA P. https://doi.org/10.13140/RG.2.2.10404.24966.
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