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 inverted T-beam system is well suited for short to medium spans, and can be built quickly and efficiently. The system was developed for Virginia, based on a similar system used in Minnesota, and has been used in two structures in the commonwealth. Previous research helped to develop the original details, but additional research was recommended
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Edwin, E. B. A., Gilbertson, B., Pulumati, V., & Roberts-Wollmann, C. L. (2020). Refinement of the Inverted T-Beam System for Virginia (Report No. FHWA/VTRC 20-R25). Virginia Transportation Research Council (VTRC). https://rosap.ntl.bts.gov/view/dot/54879
Edwin, Ezra Bin Arif, Becky Gilbertson, Vijaykanth Pulumati, and C L Roberts-Wollmann. Refinement of the Inverted T-Beam System for Virginia. Report no. FHWA/VTRC 20-R25. Virginia Transportation Research Council (VTRC), 2020. https://rosap.ntl.bts.gov/view/dot/54879.
Edwin, Ezra Bin Arif, et al. Refinement of the Inverted T-Beam System for Virginia. Virginia Transportation Research Council (VTRC), 2020, Report no. FHWA/VTRC 20-R25, ROSA P. https://rosap.ntl.bts.gov/view/dot/54879.
This document describes a pilot project that evaluated the potential for developing standardized criteria that railroads can use to determine the probable intent (i.e., suicide or accident) of individuals involved in trespasser strikes on railroad right-of-way in the United States. These criteria are designed to help railroads better understand sui
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Chase, S. G., & Hiltunen, D. (2020). Consistent Trespasser Intent Determination Criteria Pilot Project (Report No. DOT/FRA/ORD-20/15). United States. Department of Transportation. Federal Railroad Administration. https://rosap.ntl.bts.gov/view/dot/48842
Chase, Stephanie G. and Danielle Hiltunen. Consistent Trespasser Intent Determination Criteria Pilot Project. Report no. DOT/FRA/ORD-20/15. United States. Department of Transportation. Federal Railroad Administration, 2020. https://rosap.ntl.bts.gov/view/dot/48842.
Chase, Stephanie G., and Danielle Hiltunen Consistent Trespasser Intent Determination Criteria Pilot Project. United States. Department of Transportation. Federal Railroad Administration, 2020, Report no. DOT/FRA/ORD-20/15, ROSA P. https://rosap.ntl.bts.gov/view/dot/48842.
University of Florida researchers examined the effectiveness of ASCT in one of several pilot locations where ASCT is being implemented. The research team conducted a literature review and an overview of industry practice on Regional Traffic Operations Programs (RTOP). This task proved especially valuable in focusing the goals and further tasks of t
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Ponnaluri, R., Vega, P., & Elefteriadou, A. (. (2020). Evaluation of Arterial Corridor Improvements and Traffic Management Plans in Florida [Summary] (Report No. BDV31-977-44). Florida. Department of Transportation. Research Center. https://rosap.ntl.bts.gov/view/dot/68218
Ponnaluri, Raj, Pete Vega, and Ageliki (Lily) Elefteriadou. Evaluation of Arterial Corridor Improvements and Traffic Management Plans in Florida [Summary]. Report no. BDV31-977-44. Florida. Department of Transportation. Research Center, 2020. https://rosap.ntl.bts.gov/view/dot/68218.
Ponnaluri, Raj, et al. Evaluation of Arterial Corridor Improvements and Traffic Management Plans in Florida [Summary]. Florida. Department of Transportation. Research Center, 2020, Report no. BDV31-977-44, ROSA P. https://rosap.ntl.bts.gov/view/dot/68218.
The purpose of this project was to develop a training program by capturing knowledge from MnDOT Subject Matter Experts in an area of knowledge that is essential to the functioning of MnDOT in performing its statutory required function of constructing and maintaining the road and bridge infrastructure for the State of Minnesota. The project uses the
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This research examined how and whether blanket applications of 1–3 inches of compost over bare soil can improve slope stabilization and whether such applications can aid in the establishment of native grasses and forbs, particularly for sloping roadside conditions on Massachusetts Dept. of Transportation (MassDOT) jurisdictional roadways. The resea
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Ahern, J., Ramage, C., Piantedosi, M., & Bayer, A. (2020). Compost Blankets for Erosion Control and Vegetation Establishment (Report No. 20-012). University of Massachusetts at Amherst. https://rosap.ntl.bts.gov/view/dot/50418
Ahern, Jack, Christopher Ramage, Michael Piantedosi, and Amanda Bayer. Compost Blankets for Erosion Control and Vegetation Establishment. Report no. 20-012. University of Massachusetts at Amherst, 2020. https://rosap.ntl.bts.gov/view/dot/50418.
Ahern, Jack, et al. Compost Blankets for Erosion Control and Vegetation Establishment. University of Massachusetts at Amherst, 2020, Report no. 20-012, ROSA P. https://rosap.ntl.bts.gov/view/dot/50418.
RoadHAT is a tool developed by the Center for Road Safety and implemented for the INDOT safety management practice to help identify both safety needs and relevant road improvements. This study has modified the tool to facilitate a quick and convenient comparison of various design alternatives in the preliminary design stage for scoping small and me
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Tarko, A. P., Romero, M., Lizarazo, C., & Pineda, R. (2020). Statistical Analysis of Safety Improvements and Integration Into Project Design Process (Report No. FHWA/IN/JTRP-2020/09). Purdue University. Joint Transportation Research Program. https://doi.org/10.5703/1288284317121
Tarko, Andrew P., Mario Romero, Cristhian Lizarazo, and Raul Pineda. Statistical Analysis of Safety Improvements and Integration Into Project Design Process. Report no. FHWA/IN/JTRP-2020/09. Purdue University. Joint Transportation Research Program, 2020. https://doi.org/10.5703/1288284317121.
Tarko, Andrew P., et al. Statistical Analysis of Safety Improvements and Integration Into Project Design Process. Purdue University. Joint Transportation Research Program, 2020, Report no. FHWA/IN/JTRP-2020/09, ROSA P. https://doi.org/10.5703/1288284317121.
This evaluation determined the change in crash frequency, type or severity associated with longitudinal rectangular rumble strips on rural two-lane undivided and rural four-lane divided Minnesota roadways constructed between 2012 and 2018. Crash Modification Factors (CMFs) were estimated using cross-sectional analysis to compare crash experience of
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Storm, R., Klump, S., Kosta, O., Raad, M., & Wemple, E. (2020). Rectangular Rumble Strip Safety Evaluation (Report No. MN 2020-07). Minnesota. Department of Transportation. https://rosap.ntl.bts.gov/view/dot/53993
Storm, Richard, Sam Klump, Olga Kosta, May Raad, and Elizabeth Wemple. Rectangular Rumble Strip Safety Evaluation. Report no. MN 2020-07. Minnesota. Department of Transportation, 2020. https://rosap.ntl.bts.gov/view/dot/53993.
Storm, Richard, et al. Rectangular Rumble Strip Safety Evaluation. Minnesota. Department of Transportation, 2020, Report no. MN 2020-07, ROSA P. https://rosap.ntl.bts.gov/view/dot/53993.
The research conducted in this project was undertaken to gain insight into the load path and intensity of the longitudinal braking force in highway bridge substructures, specifically shorter span, simply-supported bridges. To evaluate braking force magnitude and distribution, two types of field tests were conducted static tests and dynamic braking
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Marshall, J. D., Anderson, J. B., Barnes, R. W., Barr, M. D., Quinn, A. J., & Wu, H. (2020). Experimental Determination of Braking Force Distribution in Steel Pile Bent Bridges (Report No. ALDOT 930-928). Auburn University. Dept. of Civil Engineering. https://rosap.ntl.bts.gov/view/dot/64902
Marshall, Justin D., J Brian Anderson, Robert W. Barnes, Matthew D Barr, Anna J Quinn, and Hongyang Wu. Experimental Determination of Braking Force Distribution in Steel Pile Bent Bridges. Report no. ALDOT 930-928. Auburn University. Dept. of Civil Engineering, 2020. https://rosap.ntl.bts.gov/view/dot/64902.
Marshall, Justin D., et al. Experimental Determination of Braking Force Distribution in Steel Pile Bent Bridges. Auburn University. Dept. of Civil Engineering, 2020, Report no. ALDOT 930-928, ROSA P. https://rosap.ntl.bts.gov/view/dot/64902.
Software algorithms used in Positive Train Control (PTC) systems designed to predict passenger train stopping distance and enforce a penalty brake application must be evaluated to verify their performance, which can be challenging due to variations in operational and equipment characteristics. The Federal Railroad Administration contracted Transpor
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Dasher, J., & Morrison, K. (2020). Evaluation of PTC Braking Enforcement Algorithms for Passenger and Commuter Trains (Report No. DOT/FRA/ORD-20/16). United States. Department of Transportation. Federal Railroad Administration. https://rosap.ntl.bts.gov/view/dot/48882
Dasher, Jeremy and Kenny Morrison. Evaluation of PTC Braking Enforcement Algorithms for Passenger and Commuter Trains. Report no. DOT/FRA/ORD-20/16. United States. Department of Transportation. Federal Railroad Administration, 2020. https://rosap.ntl.bts.gov/view/dot/48882.
Dasher, Jeremy, and Kenny Morrison Evaluation of PTC Braking Enforcement Algorithms for Passenger and Commuter Trains. United States. Department of Transportation. Federal Railroad Administration, 2020, Report no. DOT/FRA/ORD-20/16, ROSA P. https://rosap.ntl.bts.gov/view/dot/48882.
The loss of functionality and the development of distress in concrete pavements is often attributable to the poor subbase and subgrade conditions and/or loss of support due to the development of the voids underneath the slab. Subgrade soil stabilization can be used as an effective approach to restore the functionality of the subgrades in patching p
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Behnood, A., & Olek, J. (2020). Development of Subgrade Stabilization and Slab Undersealing Solutions for PCC Pavements Restoration and Repairs (Report No. FHWA/IN/JTRP-2020/13). Purdue University. Joint Transportation Research Program. https://doi.org/10.5703/1288284317128
Behnood, Ali and Jan Olek. Development of Subgrade Stabilization and Slab Undersealing Solutions for PCC Pavements Restoration and Repairs. Report no. FHWA/IN/JTRP-2020/13. Purdue University. Joint Transportation Research Program, 2020. https://doi.org/10.5703/1288284317128.
Behnood, Ali, and Jan Olek Development of Subgrade Stabilization and Slab Undersealing Solutions for PCC Pavements Restoration and Repairs. Purdue University. Joint Transportation Research Program, 2020, Report no. FHWA/IN/JTRP-2020/13, ROSA P. https://doi.org/10.5703/1288284317128.
In 2018, the Virginia Department of Transportation (VDOT) initiated this study to improve its understanding of past road diets in Virginia. Of interest were how road diets have been analyzed, how their performance has been quantified, how other states and localities have optimized their practices relating to road diets (e.g., public participation p
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Ohlms, P. B., Dougald, L. E., & MacKnight, H. E. (2020). How’s That Diet Working: Performance of Virginia Road Diets (Report No. FHWA/VTRC 20-R19). Virginia Transportation Research Council (VTRC). https://rosap.ntl.bts.gov/view/dot/54878
Ohlms, Peter B., Lance E. Dougald, and Hannah E MacKnight. How’s That Diet Working: Performance of Virginia Road Diets. Report no. FHWA/VTRC 20-R19. Virginia Transportation Research Council (VTRC), 2020. https://rosap.ntl.bts.gov/view/dot/54878.
Ohlms, Peter B., et al. How’s That Diet Working: Performance of Virginia Road Diets. Virginia Transportation Research Council (VTRC), 2020, Report no. FHWA/VTRC 20-R19, ROSA P. https://rosap.ntl.bts.gov/view/dot/54878.
The purpose of this research was to explore candidate booster performance metrics that have the potential to identify less effective booster systems, since current FMVSS No. 213 booster performance requirements can be met without a booster. A combination of volunteer testing of belt fit and posture along with dynamic sled tests of booster seats was
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Klinich, K. D., Jones, M. H., Manary, M. A., Ebert, S. H., Boyle, K. J., Malik, L. J., Orton, N. R., & Reed, M. P. (2020). Investigation of Potential Design and Performance Criteria for Booster Seats Through Volunteer and Dynamic Testing (Report No. DOT HS 812 919). United States. Department of Transportation. National Highway Traffic Safety Administration. https://doi.org/10.21949/1530188
Klinich, Kathleen DeSantis, Monica H. Jones, Miriam A. Manary, Sheila H. Ebert, Kyle J. Boyle, Laura J. Malik, Nichole R. Orton, and Matthew P. Reed. Investigation of Potential Design and Performance Criteria for Booster Seats Through Volunteer and Dynamic Testing. Report no. DOT HS 812 919. United States. Department of Transportation. National Highway Traffic Safety Administration, 2020. https://doi.org/10.21949/1530188.
Klinich, Kathleen DeSantis, et al. Investigation of Potential Design and Performance Criteria for Booster Seats Through Volunteer and Dynamic Testing. United States. Department of Transportation. National Highway Traffic Safety Administration, 2020, Report no. DOT HS 812 919, ROSA P. https://doi.org/10.21949/1530188.
The main goal of this project was to establish protocols for conducting efficient chemical stabilization design for problematic soils with and without soluble sulfates within the state of Montana. A major portion of chemical stabilization protocols involves the selection of type and amount of the additives. The proper selection of type and concentr
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Supporting Files
Chittoori, B. C. S. (2020). Guidelines for Chemically Stabilizing Problematic Soils: Final Report (Report No. FHWA/MT-20-002/9389-522/FR). Montana. Department of Transportation. Research Management Unit. https://doi.org/10.21949/1518309
Chittoori, Bhaskar C S. Guidelines for Chemically Stabilizing Problematic Soils: Final Report. Report no. FHWA/MT-20-002/9389-522/FR. Montana. Department of Transportation. Research Management Unit, 2020. https://doi.org/10.21949/1518309.
Chittoori, Bhaskar C S Guidelines for Chemically Stabilizing Problematic Soils: Final Report. Montana. Department of Transportation. Research Management Unit, 2020, Report no. FHWA/MT-20-002/9389-522/FR, ROSA P. https://doi.org/10.21949/1518309.
The project introduces a new index of geographic opportunity that improves upon existing measures to analyze the spatial mismatch between job growth and populations in urban settings. Past measures of job accessibility have relied on measures of linear distance between populations and job, actual commute times for those working, or much simpler reg
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DatasetSupporting Files
Painter, G., Boarnet, M. G., & Swayne, M. (2020). Examining the Geography of Opportunity through a New Public Transit Opportunity Index [supporting datasets] (Report No. PSR-17-09). University of Southern California. https://doi.org/10.7910/DVN/HCAMST
Painter, Gary, Marlon G Boarnet, and Madison Swayne. Examining the Geography of Opportunity through a New Public Transit Opportunity Index [supporting datasets]. Report no. PSR-17-09. University of Southern California, 2020. https://doi.org/10.7910/DVN/HCAMST.
Painter, Gary, et al. Examining the Geography of Opportunity through a New Public Transit Opportunity Index [supporting datasets]. University of Southern California, 2020, Report no. PSR-17-09, ROSA P. https://doi.org/10.7910/DVN/HCAMST.
The project introduces a new index of geographic opportunity that improves upon existing measures to analyze the spatial mismatch between job growth and populations in urban settings. Past measures of job accessibility have relied on measures of linear distance between populations and job, actual commute times for those working, or much simpler reg
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Painter, G., Boarnet, M. G., & Swayne, M. (2020). Examining the Geography of Opportunity through a New Public Transit Opportunity Index (Report No. PSR-17-09). University of Southern California. https://doi.org/10.7910/DVN/HCAMST
Painter, Gary, Marlon G Boarnet, and Madison Swayne. Examining the Geography of Opportunity through a New Public Transit Opportunity Index. Report no. PSR-17-09. University of Southern California, 2020. https://doi.org/10.7910/DVN/HCAMST.
Painter, Gary, et al. Examining the Geography of Opportunity through a New Public Transit Opportunity Index. University of Southern California, 2020, Report no. PSR-17-09, ROSA P. https://doi.org/10.7910/DVN/HCAMST.
The economic impacts of a major disruption to seaports and their associated transportation infrastructure can be extensive and can affect people in a region unequally. To estimate the aggregate and distributional economic consequences of such disruptions, we developed an integrated transportation-socioeconomic analysis model to analyze the impacts
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Wei, D., Koc, E., Rose, A., Chen, Z., & Soibelman, L. (2020). Socioeconomic Dimensions of Resilience to Seaport and Highway Transportation (Report No. PSR-18-07). California. Dept. of Transportation. Division of Research and Innovation. https://rosap.ntl.bts.gov/view/dot/54423
Wei, Dan, Eyuphan Koc, Adam Rose, Zhenhua Chen, and Lucio Soibelman. Socioeconomic Dimensions of Resilience to Seaport and Highway Transportation. Report no. PSR-18-07. California. Dept. of Transportation. Division of Research and Innovation, 2020. https://rosap.ntl.bts.gov/view/dot/54423.
Wei, Dan, et al. Socioeconomic Dimensions of Resilience to Seaport and Highway Transportation. California. Dept. of Transportation. Division of Research and Innovation, 2020, Report no. PSR-18-07, ROSA P. https://rosap.ntl.bts.gov/view/dot/54423.
Mobile smartphone applications may assist seniors in their mobility and connect them with the community. This project involves the development of a new version of the Urban Connector application to: (1) identify a metric of social connectivity from the mobility perspective from existing literature; (2) update the Urban Connector application to cons
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Cheu, R. L., Nunez-Mchiri, G. G., Rosales, N. V., Jimenez, U. C., Acosta, R. A. V., Becerra, D., Granados, R. P., & Briones, F. (2020). Exploring Social Connectivity and Transportation Needs of the Seniors Through a Mobile Smartphone Application. Cornell University. Center for Transportation, Environment, and Community Health. (CTECH). https://rosap.ntl.bts.gov/view/dot/55561
Cheu, Ruey Long, Guillermina Gina Nunez-Mchiri, Natalia Villanueva Rosales, Ubaldo Castro Jimenez, Raul Alejandro Vargas Acosta, Diana Becerra, Ruth Priscilla Granados, and Fernie Briones. Exploring Social Connectivity and Transportation Needs of the Seniors Through a Mobile Smartphone Application. Cornell University. Center for Transportation, Environment, and Community Health. (CTECH), 2020. https://rosap.ntl.bts.gov/view/dot/55561.
Cheu, Ruey Long, et al. Exploring Social Connectivity and Transportation Needs of the Seniors Through a Mobile Smartphone Application. Cornell University. Center for Transportation, Environment, and Community Health. (CTECH), 2020, ROSA P. https://rosap.ntl.bts.gov/view/dot/55561.
A new methodology to estimate the unknown pile length called Effective Dispersion Analysis of Reflections (EDAR) is developed. EDAR explicitly incorporates the dispersion properties of the wave generated on hammer impact to provide a length estimate. A software package is developed for seamless application of the EDAR methodology facilitating fata
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Guddati, M., Rahman, S., & Samu, V. (2020). Field Testing and Calibration of EDAR Method for Estimating Embedded Depth of Pile Foundation in North Carolina (Report No. FHWA/NC/2018-29). North Carolina State University. Research and Development Unit. https://rosap.ntl.bts.gov/view/dot/56267
Guddati, Murthy, Shamim Rahman, and Vivek Samu. Field Testing and Calibration of EDAR Method for Estimating Embedded Depth of Pile Foundation in North Carolina. Report no. FHWA/NC/2018-29. North Carolina State University. Research and Development Unit, 2020. https://rosap.ntl.bts.gov/view/dot/56267.
Guddati, Murthy, et al. Field Testing and Calibration of EDAR Method for Estimating Embedded Depth of Pile Foundation in North Carolina. North Carolina State University. Research and Development Unit, 2020, Report no. FHWA/NC/2018-29, ROSA P. https://rosap.ntl.bts.gov/view/dot/56267.
This report highlights the experiences, successes, challenges, and lessons learned of two national peer agencies (Capital Metro and Valley Metro) and four local peer agencies (Broward County Transit, Central Florida Regional Transportation Authority [LYNX], Jacksonville Transportation Authority, and Pinellas Suncoast Transit Authority) on implement
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Fijalkowski, J. (2020). Palm Beach TPA Enhanced Transit Peer Exchange: A TCPB Peer Exchange Event (Report No. DOT-VNTSC-FHWA-20-08). United States. Federal Transit Administration. Office of Planning and Environment. https://rosap.ntl.bts.gov/view/dot/44451
Fijalkowski, Jared. Palm Beach TPA Enhanced Transit Peer Exchange: A TCPB Peer Exchange Event. Report no. DOT-VNTSC-FHWA-20-08. United States. Federal Transit Administration. Office of Planning and Environment, 2020. https://rosap.ntl.bts.gov/view/dot/44451.
Fijalkowski, Jared Palm Beach TPA Enhanced Transit Peer Exchange: A TCPB Peer Exchange Event. United States. Federal Transit Administration. Office of Planning and Environment, 2020, Report no. DOT-VNTSC-FHWA-20-08, ROSA P. https://rosap.ntl.bts.gov/view/dot/44451.
The potential for automated vehicles (AVs) to reduce parking to allow for the conversion of on-and off-street parking to new uses, such as new space for walk, bike, and shared -micro-mobility services, and housing), has sparked significant interest among urban planners. AVs could drop-off and pick-up passengers in areas where parking costs are high
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DatasetSupporting Files
Rodier, C., & Chai, H. (2020). Automated Vehicles and Central Business District Parking: The Effects of Drop-off-Travel on Traffic Flow and Vehicle Emissions [supporting datasets] (Report No. NCST-UCD-RR-20-17, UCD-ITS-RR-20-33). University of California, Davis. https://doi.org/10.25338/B8DG7P
Rodier, Caroline and Huajun Chai. Automated Vehicles and Central Business District Parking: The Effects of Drop-off-Travel on Traffic Flow and Vehicle Emissions [supporting datasets]. Report no. NCST-UCD-RR-20-17, UCD-ITS-RR-20-33. University of California, Davis, 2020. https://doi.org/10.25338/B8DG7P.
Rodier, Caroline, and Huajun Chai Automated Vehicles and Central Business District Parking: The Effects of Drop-off-Travel on Traffic Flow and Vehicle Emissions [supporting datasets]. University of California, Davis, 2020, Report no. NCST-UCD-RR-20-17, UCD-ITS-RR-20-33, ROSA P. https://doi.org/10.25338/B8DG7P.
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