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.
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.
The construction of three partial-depth recycling (PDR) pilot projects was monitored in late 2021. These studies focused on the benefits of adding supplemental aggregates to PDR materials, comparison of emulsified asphalt (EA) and foamed asphalt (FA) recycling agents in PDR applications, comparison of the gradations produced by single- and multi-un
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Louw, S., & Jones, D. (2022). 2021 Cold Recycling Pilot Projects: Construction and Quality Control (Report No. UCPRC-TM-2022-03). California. Department of Transportation. https://doi.org/10.7922/G2N58JQ0
Louw, Stephanus and David Jones. 2021 Cold Recycling Pilot Projects: Construction and Quality Control. Report no. UCPRC-TM-2022-03. California. Department of Transportation, 2022. https://doi.org/10.7922/G2N58JQ0.
Louw, Stephanus, and David Jones 2021 Cold Recycling Pilot Projects: Construction and Quality Control. California. Department of Transportation, 2022, Report no. UCPRC-TM-2022-03, ROSA P. https://doi.org/10.7922/G2N58JQ0.
This study utilized Roadside Analysis Program Version 3 (RSAPv3) simulation because it implements previous crash statistics and could be readily updated with local data. With the help of KDOT staff, the research team synthesized traffic operation data and geometric features on rural roads in Kansas and carried out crash simulations using RSAPv3 to
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Wang, P., & Fitzsimmons, E. J. (2022). Guardrail Evaluation for Hazards on Low-Volume Rural Roadways in Kansas Using RSAP (Report No. K-TRAN: KSU-19-4). Kansas Department of Transportation. Bureau of Research. https://rosap.ntl.bts.gov/view/dot/60788
Wang, Peng and Eric J. Fitzsimmons. Guardrail Evaluation for Hazards on Low-Volume Rural Roadways in Kansas Using RSAP. Report no. K-TRAN: KSU-19-4. Kansas Department of Transportation. Bureau of Research, 2022. https://rosap.ntl.bts.gov/view/dot/60788.
Wang, Peng, and Eric J. Fitzsimmons Guardrail Evaluation for Hazards on Low-Volume Rural Roadways in Kansas Using RSAP. Kansas Department of Transportation. Bureau of Research, 2022, Report no. K-TRAN: KSU-19-4, ROSA P. https://rosap.ntl.bts.gov/view/dot/60788.
University of Michigan. Transportation Research Institute
2022-01-01
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The Safety Pilot Model Deployment (SPMD) study was run in the Ann Arbor, MI area and involved over 2,000 vehicles. The study goal was to pilot a connected-vehicle system that included roadside units (RSUs) fixed to specific intersections and vehicle-based communication units. Data were collected from RSUs as well as vehicles. Each vehicle was equip
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Dataset
University of Michigan. Transportation Research Institute (2022). Safety Pilot Model Deployment: WSU Basic Safety Messages. University of Michigan. Transportation Research Institute. https://rosap.ntl.bts.gov/view/dot/66785
University of Michigan. Transportation Research Institute. Safety Pilot Model Deployment: WSU Basic Safety Messages. University of Michigan. Transportation Research Institute, 2022. https://rosap.ntl.bts.gov/view/dot/66785.
University of Michigan. Transportation Research Institute Safety Pilot Model Deployment: WSU Basic Safety Messages. University of Michigan. Transportation Research Institute, 2022, ROSA P. https://rosap.ntl.bts.gov/view/dot/66785.
The expected crash frequency is the long-term average crash count for a specific site. It is extensively used to systematically evaluate the crash risk associated with roadway elements. To estimate the expected crashes, the Empirical Bayesian (EB) approach is typically employed. The EB method is a computationally convenient approximation to the Ful
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Khodadadi, A., Tsapakis, I., Shirazi, M., Das, S., & Lord, D. (2022). Derivation of the Empirical Bayesian Method for the Negative Binomial-Lindley Generalized Linear Model With Application in Traffic Safety. Safety through Disruption (Safe-D) University Transportation Center (UTC). https://rosap.ntl.bts.gov/view/dot/62519
Khodadadi, Ali, Ioannis Tsapakis, Mohammadali Shirazi, Subasish Das, and Dominique Lord. Derivation of the Empirical Bayesian Method for the Negative Binomial-Lindley Generalized Linear Model With Application in Traffic Safety. Safety through Disruption (Safe-D) University Transportation Center (UTC), 2022. https://rosap.ntl.bts.gov/view/dot/62519.
Khodadadi, Ali, et al. Derivation of the Empirical Bayesian Method for the Negative Binomial-Lindley Generalized Linear Model With Application in Traffic Safety. Safety through Disruption (Safe-D) University Transportation Center (UTC), 2022, ROSA P. https://rosap.ntl.bts.gov/view/dot/62519.
The spatial mismatch between demand and supply over time is a significant concern in a bike-share service. One primary strategy to fill the mismatch is to rebalance a shared bike fleet by vans or trucks. The more vans operators use to meet the demand, the more vehicle miles traveled (VMT) the system produces, offsetting the VMT reduction benefit th
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Fukushige, T. (2022). Incentive-Based Approach to Rebalancing a Dock-Less E-Bike-Share System for Sustainability. University of California, Davis. https://rosap.ntl.bts.gov/view/dot/67015
Fukushige, Tatsuya. Incentive-Based Approach to Rebalancing a Dock-Less E-Bike-Share System for Sustainability. University of California, Davis, 2022. https://rosap.ntl.bts.gov/view/dot/67015.
Fukushige, Tatsuya Incentive-Based Approach to Rebalancing a Dock-Less E-Bike-Share System for Sustainability. University of California, Davis, 2022, ROSA P. https://rosap.ntl.bts.gov/view/dot/67015.
The California Department of Transportation (Caltrans) has a growing need to be able to quantify its greenhouse gas (GHG) emissions and the other environmental impacts of pavement operations, and to consider GHG and those other impacts in pavement management, conceptual design, design, materials selection, and construction project delivery decision
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Lea, J., Harvey, J. T., Saboori, A., & Butt, A. A. (2022). eLCAP: A Web Application for Environmental Life Cycle Assessment for Pavements (Report No. UCPRC-TM-2018-04). California. Department of Transportation. Department of Research, Innovation and System Information. https://doi.org/10.7922/G2ST7N5G
Lea, Jon, John T Harvey, Arash Saboori, and Ali Azhar Butt. eLCAP: A Web Application for Environmental Life Cycle Assessment for Pavements. Report no. UCPRC-TM-2018-04. California. Department of Transportation. Department of Research, Innovation and System Information, 2022. https://doi.org/10.7922/G2ST7N5G.
Lea, Jon, et al. eLCAP: A Web Application for Environmental Life Cycle Assessment for Pavements. California. Department of Transportation. Department of Research, Innovation and System Information, 2022, Report no. UCPRC-TM-2018-04, ROSA P. https://doi.org/10.7922/G2ST7N5G.
This study investigated the performance, safety, and public percerptions on US-23 Flex route. Overall, crashes were reduced by roughly 17 percent across the entire corridor in both directions. The improvements were significantly more pronounced in the SB direction, where crashes were reduced by 34 percent overall and more than 50 percent during the
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Kassens-Noor, E., Savolainen, P. T., Gates, T. J., Cai, M., Cai, Q., Jashami, H., Megat-Johari, M. U., Decaminada, T., Herin, G., & Zockaie, A. (2022). Evaluation of an Active Traffic Management System with Part-Time Use of the Inside Shoulder (Report No. SPR-1706). Michigan Department of Transportation. Research Administration. https://rosap.ntl.bts.gov/view/dot/61951
Kassens-Noor, Eva, Peter T. Savolainen, Timothy J. Gates, Meng Cai, Qing Cai, Hisham Jashami, Megat-Usamah Megat-Johari, Travis Decaminada, Gabrielle Herin, and Ali Zockaie. Evaluation of an Active Traffic Management System with Part-Time Use of the Inside Shoulder. Report no. SPR-1706. Michigan Department of Transportation. Research Administration, 2022. https://rosap.ntl.bts.gov/view/dot/61951.
Kassens-Noor, Eva, et al. Evaluation of an Active Traffic Management System with Part-Time Use of the Inside Shoulder. Michigan Department of Transportation. Research Administration, 2022, Report no. SPR-1706, ROSA P. https://rosap.ntl.bts.gov/view/dot/61951.
The main objective of this project was to evaluate construction issues and characterize the long-term performance of compacted concrete pavement (CCP). Three CCP test cells were designed and constructed in Scott County, Missouri, as part of a larger construction project. The total pavement length was 42 ft for the three cells. Cell 1 and Cell 2 wer
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Khayat, K. H., Farzadnia, N., & Abdelrazik, A. (2022). Compacted Concrete Pavement [2022] (Report No. cmr 22-001). Missouri. Department of Transportation. Construction and Materials Division. https://rosap.ntl.bts.gov/view/dot/60860
Khayat, Kamal H., Nima Farzadnia, and Ahmed Abdelrazik. Compacted Concrete Pavement [2022]. Report no. cmr 22-001. Missouri. Department of Transportation. Construction and Materials Division, 2022. https://rosap.ntl.bts.gov/view/dot/60860.
Khayat, Kamal H., et al. Compacted Concrete Pavement [2022]. Missouri. Department of Transportation. Construction and Materials Division, 2022, Report no. cmr 22-001, ROSA P. https://rosap.ntl.bts.gov/view/dot/60860.
Ohio transportation projects are largely founded on three types of foundations: spread footings, drilled shafts, and driven piles. Spread footings are often used in areas where rock is near the surface or where there is competent soil and the structural loads are relatively light. Drilled shafts are almost always socketed into rock, and consequentl
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Bilgin, Ömer and Jamal Nusairat. Pile Driving Setup for Ohio Soils [Fact Sheet]. Ohio. Department of Transportation, 2022. https://rosap.ntl.bts.gov/view/dot/72892.
Bilgin, Ömer, and Jamal Nusairat Pile Driving Setup for Ohio Soils [Fact Sheet]. Ohio. Department of Transportation, 2022, ROSA P. https://rosap.ntl.bts.gov/view/dot/72892.
When a through travel lane on an arterial road is dropped shortly beyond a signalized intersection, there can be a negative impact on capacity as drivers try to preemptively merge before the intersection. This research seeks to increase understanding of the factors that impact the utilization of discontinued (short) lanes and develop standards for
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Lunt, C., Bassett, D., Clark, C., & Hooper, I. (2022). Predicting Lane Utilization at Signalized Intersections in Advance of Arterial Lane Drops (Report No. UT-22.01). Utah Department of Transportation. https://rosap.ntl.bts.gov/view/dot/61517
Lunt, Camille, David Bassett, Calvin Clark, and Ivan Hooper. Predicting Lane Utilization at Signalized Intersections in Advance of Arterial Lane Drops. Report no. UT-22.01. Utah Department of Transportation, 2022. https://rosap.ntl.bts.gov/view/dot/61517.
Lunt, Camille, et al. Predicting Lane Utilization at Signalized Intersections in Advance of Arterial Lane Drops. Utah Department of Transportation, 2022, Report no. UT-22.01, ROSA P. https://rosap.ntl.bts.gov/view/dot/61517.
The purpose of this project was to understand and analyze the nature of personnel gaps at the Division of Transportation System Development (DTSD) and offer recommendations on how best to address some of the gaps. The UWM-IPIT project team conducted gap analysis using a variety of methodologies: SWOT analysis, attrition analysis over time, areas of
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Singh, R., Qin, X., Gottlieb, M., & Fouad, N. A. (2022). WisDOT Workforce Development and Readiness Project (Report No. 0092-21-62). Wisconsin. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/67677
Singh, Romila, Xiao Qin, Mark Gottlieb, and Nadya A Fouad. WisDOT Workforce Development and Readiness Project. Report no. 0092-21-62. Wisconsin. Department of Transportation, 2022. https://rosap.ntl.bts.gov/view/dot/67677.
Singh, Romila, et al. WisDOT Workforce Development and Readiness Project. Wisconsin. Department of Transportation, 2022, Report no. 0092-21-62, ROSA P. https://rosap.ntl.bts.gov/view/dot/67677.
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