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.
Fragmentation of activities and travel is defined here as the multiple sequencing of many relatively short activities and trips that happen in a person's daily schedule. These are combined with much longer activities and travel to form a complete schedule of activities and travel by each observed individual. Fragmentation of activity-travel schedul
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McBride, E. C., Davis, A. W., & Goulias, K. G. (2019). An Analysis of Accessibility, Social Interaction, and Activity-Travel Fragmentation in California (Report No. PSR-18-09). Pacific Southwest Region University Transportation Center (UTC). https://rosap.ntl.bts.gov/view/dot/54428
McBride, Elizabeth C, Adam W. Davis, and Konstadinos G. Goulias. An Analysis of Accessibility, Social Interaction, and Activity-Travel Fragmentation in California. Report no. PSR-18-09. Pacific Southwest Region University Transportation Center (UTC), 2019. https://rosap.ntl.bts.gov/view/dot/54428.
McBride, Elizabeth C, et al. An Analysis of Accessibility, Social Interaction, and Activity-Travel Fragmentation in California. Pacific Southwest Region University Transportation Center (UTC), 2019, Report no. PSR-18-09, ROSA P. https://rosap.ntl.bts.gov/view/dot/54428.
Researchers verified the ASR resistance property of the selected concrete mix designs of bridge girders by the precast producers (PCPs) in Texas by applying the developed combined performance-based approach. The specific objectives were: • Reproduce the selected precast mixes in the laboratory and test by the ACCT method to determine if the mixes a
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Mukhopadhyay, A., Liu, K. W., Jalal, M., & Hsu, J. L. (2019). Verification of ASR Resistance Property of the Selected Concrete Mix Designs by the Precast Industries in Texas: Project Summary (Report No. 5-6656-01). Texas A&M Transportation Institute. https://rosap.ntl.bts.gov/view/dot/60856
Mukhopadhyay, Anol, Kai-Wei Liu, Mostafa Jalal, and Jia-Lin Hsu. Verification of ASR Resistance Property of the Selected Concrete Mix Designs by the Precast Industries in Texas: Project Summary. Report no. 5-6656-01. Texas A&M Transportation Institute, 2019. https://rosap.ntl.bts.gov/view/dot/60856.
Mukhopadhyay, Anol, et al. Verification of ASR Resistance Property of the Selected Concrete Mix Designs by the Precast Industries in Texas: Project Summary. Texas A&M Transportation Institute, 2019, Report no. 5-6656-01, ROSA P. https://rosap.ntl.bts.gov/view/dot/60856.
Developing quality California-specific crash modification factors (CMFs) for bicycle-related safety countermeasures will support practitioners in making more informed decisions about infrastructure improvement projects. The researchers identified a comprehensive list of countermeasures, identified existing CMFs and reviewed their quality and applic
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Grembeck, O., & Griswold, J. (2019). Development of Crash Reduction Factors for Bicycle-Related Safety Countermeasures (Report No. CA19-3180). University of California, Berkeley. Safe Transportation Research and Education Center. https://rosap.ntl.bts.gov/view/dot/56816
Grembeck, Offer and Julia Griswold. Development of Crash Reduction Factors for Bicycle-Related Safety Countermeasures. Report no. CA19-3180. University of California, Berkeley. Safe Transportation Research and Education Center, 2019. https://rosap.ntl.bts.gov/view/dot/56816.
Grembeck, Offer, and Julia Griswold Development of Crash Reduction Factors for Bicycle-Related Safety Countermeasures. University of California, Berkeley. Safe Transportation Research and Education Center, 2019, Report no. CA19-3180, ROSA P. https://rosap.ntl.bts.gov/view/dot/56816.
Transportation finance has become increasingly unreliable in recent years, due to the declining revenue available from the motor fuel tax, increasing auto efficiency, and political reluctance to raise taxes. Some states have relied on toll revenue and other user fees to overcome these revenue challenges. However toll roads are often unpopular, due
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Weinreich, D., Scott, T., Reeves, S. M., & Hamidi, S. (2019). Making Tolling Transparent: Analyzing Processes Used to Allocate & Distribute Toll Highway Revenue in Multiple States. Center for Transportation, Equity, Decisions and Dollars (CTEDD) (UTC). https://rosap.ntl.bts.gov/view/dot/54414
Weinreich, David, Thomas Scott, S Matthew Reeves, and Shima Hamidi. Making Tolling Transparent: Analyzing Processes Used to Allocate & Distribute Toll Highway Revenue in Multiple States. Center for Transportation, Equity, Decisions and Dollars (CTEDD) (UTC), 2019. https://rosap.ntl.bts.gov/view/dot/54414.
Weinreich, David, et al. Making Tolling Transparent: Analyzing Processes Used to Allocate & Distribute Toll Highway Revenue in Multiple States. Center for Transportation, Equity, Decisions and Dollars (CTEDD) (UTC), 2019, ROSA P. https://rosap.ntl.bts.gov/view/dot/54414.
Using the information residing in connected vehicle Basic Safety Message (BSM) data, this project develops an algorithm that is capable of identifying the location of unwanted objects, i.e. debris on road segments. Vehicles’ lateral accelerations are used to detect lane changing and swerving behaviors to create density maps that pinpoint the locati
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Concas, S., & Kamrani, M. (2019). Development of a Real-Time Roadway Debris Hazard Spotting Tool Using Connected Vehicle Data to Enhance Roadway Safety and System Efficiency. Center for Transportation, Equity, Decisions and Dollars (CTEDD) (UTC). https://rosap.ntl.bts.gov/view/dot/53547
Concas, Sisinnio and Mohsen Kamrani. Development of a Real-Time Roadway Debris Hazard Spotting Tool Using Connected Vehicle Data to Enhance Roadway Safety and System Efficiency. Center for Transportation, Equity, Decisions and Dollars (CTEDD) (UTC), 2019. https://rosap.ntl.bts.gov/view/dot/53547.
Concas, Sisinnio, and Mohsen Kamrani Development of a Real-Time Roadway Debris Hazard Spotting Tool Using Connected Vehicle Data to Enhance Roadway Safety and System Efficiency. Center for Transportation, Equity, Decisions and Dollars (CTEDD) (UTC), 2019, ROSA P. https://rosap.ntl.bts.gov/view/dot/53547.
Partially grouted riprap (PGR) as a scour countermeasure is relatively new in the United States but has been used widely in Europe. Currently in Pennsylvania, the selection of appropriate scour countermeasures for bridge foundation protection have in general been limited in their applications to mainly dumped or hand-placed riprap, which can be dis
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Abboud, B., & Coe, J. (2019). Environmental and Cost Effectiveness of Partially Grouted Riprap for Scour Countermeasure (Report No. FHWA-PA-2019-004-TEM WO 001). Pennsylvania. Department of Transportation. Bureau of Planning and Research. https://rosap.ntl.bts.gov/view/dot/62351
Abboud, Bechara and Joseph Coe. Environmental and Cost Effectiveness of Partially Grouted Riprap for Scour Countermeasure. Report no. FHWA-PA-2019-004-TEM WO 001. Pennsylvania. Department of Transportation. Bureau of Planning and Research, 2019. https://rosap.ntl.bts.gov/view/dot/62351.
Abboud, Bechara, and Joseph Coe Environmental and Cost Effectiveness of Partially Grouted Riprap for Scour Countermeasure. Pennsylvania. Department of Transportation. Bureau of Planning and Research, 2019, Report no. FHWA-PA-2019-004-TEM WO 001, ROSA P. https://rosap.ntl.bts.gov/view/dot/62351.
Inaccessible routes between locations can be a major barrier to participation for people with physical disabilities. Even with regulations, inaccessible sidewalks continue to create problems for wheelchair users. Existing technologies do not offer a comprehensive solution to the measurement, data collection, and information storage and display of c
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Waters, S., Velan, P., Meadows, J., Toigo, Z., D’Innocenzo, M., Pearlman, J., Swisher, T., Yakupkovic, R., Myler, J., & Melville, D. (2019). Curb-Ramp Design (CRD) and Inspection System (CIS) (Report No. FHWA-PA-2019-002-PIT WO 15). Pennsylvania. Department of Transportation. Bureau of Planning and Research. https://rosap.ntl.bts.gov/view/dot/63068
Waters, S, P Velan, J Meadows, Z Toigo, M D’Innocenzo, J Pearlman, T Swisher, R Yakupkovic, J Myler, and D Melville. Curb-Ramp Design (CRD) and Inspection System (CIS). Report no. FHWA-PA-2019-002-PIT WO 15. Pennsylvania. Department of Transportation. Bureau of Planning and Research, 2019. https://rosap.ntl.bts.gov/view/dot/63068.
Waters, S, et al. Curb-Ramp Design (CRD) and Inspection System (CIS). Pennsylvania. Department of Transportation. Bureau of Planning and Research, 2019, Report no. FHWA-PA-2019-002-PIT WO 15, ROSA P. https://rosap.ntl.bts.gov/view/dot/63068.
The Pedestrian Safety Improvement Program is an effort of the California Department of Transportation (Caltrans) to identify and address problems with regard to pedestrian safety in California, with the long-term goal of substantially reducing pedestrian fatalities and injuries in California. The research presented in this report explores different
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Lu, J., Medury, A., & Grembek, O. (2019). Prioritizing High Collision Concentration Locations (HCCLs) identified using Pedestrian Safety Monitoring Report Tool (Report No. CA19-3110). University of California, Berkeley. Safe Transportation Research and Education Center. https://rosap.ntl.bts.gov/view/dot/54780
Lu, Jiajian, Aditya Medury, and Offer Grembek. Prioritizing High Collision Concentration Locations (HCCLs) identified using Pedestrian Safety Monitoring Report Tool. Report no. CA19-3110. University of California, Berkeley. Safe Transportation Research and Education Center, 2019. https://rosap.ntl.bts.gov/view/dot/54780.
Lu, Jiajian, et al. Prioritizing High Collision Concentration Locations (HCCLs) identified using Pedestrian Safety Monitoring Report Tool. University of California, Berkeley. Safe Transportation Research and Education Center, 2019, Report no. CA19-3110, ROSA P. https://rosap.ntl.bts.gov/view/dot/54780.
One of the primary functions of a bridge management system (BMS) is to inform data-driven, risk-based decision making by forecasting future network level needs and anticipating the costs and benefits of bridge replacement, rehabilitation, and preservation actions. Of these actions, bridge replacement projects account for the majority of the current
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Whelan, M. J., Cavalline, T. L., Phillips, P., & Rice, C. (2019). Improving Replacement Cost Data for NCDOT Highway Bridges (Report No. FHWA/NC/2017-09). North Carolina. Dept. of Transportation. https://rosap.ntl.bts.gov/view/dot/53594
Whelan, Matthew J, Tara L Cavalline, Patrick Phillips, and Corey Rice. Improving Replacement Cost Data for NCDOT Highway Bridges. Report no. FHWA/NC/2017-09. North Carolina. Dept. of Transportation, 2019. https://rosap.ntl.bts.gov/view/dot/53594.
Whelan, Matthew J, et al. Improving Replacement Cost Data for NCDOT Highway Bridges. North Carolina. Dept. of Transportation, 2019, Report no. FHWA/NC/2017-09, ROSA P. https://rosap.ntl.bts.gov/view/dot/53594.
Protected intersections are an integral component of Complete Streets and are used to facilitate safe crossings for bicyclists and pedestrians at intersections. Their placement is ideal after segments with protected bike lanes where drivers might not be aware of bicyclists’ presence. Protected intersections have the ability to increase drivers’ awa
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DatasetSupporting Files
Christofa, E., Knodler Jr., M. A., Deliali, A., & Campbell, N. (2019). Dissecting the Safety Benefits of Protected Intersection Design Features [supporting datasets]. Safety Research Using Simulation (SAFER-SIM) University Transportation Center. https://doi.org/10.7910/DVN/4CNELH
Christofa, Eleni, Michael A. Knodler Jr., Aikaterini Deliali, and Nicholas Campbell. Dissecting the Safety Benefits of Protected Intersection Design Features [supporting datasets]. Safety Research Using Simulation (SAFER-SIM) University Transportation Center, 2019. https://doi.org/10.7910/DVN/4CNELH.
Christofa, Eleni, et al. Dissecting the Safety Benefits of Protected Intersection Design Features [supporting datasets]. Safety Research Using Simulation (SAFER-SIM) University Transportation Center, 2019, ROSA P. https://doi.org/10.7910/DVN/4CNELH.
Data was collected over a total of 20 days, covering the period both before and after the locker installation at the Seattle Municipal Tower. Data collectors at the loading bay systematically tracked the number of trucks, total truck dwell time, truck parking location, the number and size distribution of parcels delivered, the number of packages pi
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DatasetSupporting Files
Goodchild, A. V. (2019). Final 50 Feet of the Urban Goods Delivery System: Pilot Test of an Innovative Improvement Strategy [supporting dataset]. Pacific Northwest Transportation Consortium (PacTrans) (UTC). https://doi.org/10.7910/DVN/UHYGAW
Goodchild, Anne V.. Final 50 Feet of the Urban Goods Delivery System: Pilot Test of an Innovative Improvement Strategy [supporting dataset]. Pacific Northwest Transportation Consortium (PacTrans) (UTC), 2019. https://doi.org/10.7910/DVN/UHYGAW.
Goodchild, Anne V. Final 50 Feet of the Urban Goods Delivery System: Pilot Test of an Innovative Improvement Strategy [supporting dataset]. Pacific Northwest Transportation Consortium (PacTrans) (UTC), 2019, ROSA P. https://doi.org/10.7910/DVN/UHYGAW.
The Illinois Department of Transportation (IDOT) continues to use a variety of reclaimed and recycled materials in highway construction. Recycled materials are used in highway construction to supplement aggregates, concrete, hot-mix asphalt (HMA), steel, and sealants, as well as for soil modification and pavement markings. This report summarizes th
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Morse, K. L. (2019). Illinois Highway Materials Sustainability Efforts 2018 (Report No. PRR 170). Illinois. Dept. of Transportation. Bureau of Research. https://rosap.ntl.bts.gov/view/dot/87579
Morse, Kelly L.. Illinois Highway Materials Sustainability Efforts 2018. Report no. PRR 170. Illinois. Dept. of Transportation. Bureau of Research, 2019. https://rosap.ntl.bts.gov/view/dot/87579.
Morse, Kelly L. Illinois Highway Materials Sustainability Efforts 2018. Illinois. Dept. of Transportation. Bureau of Research, 2019, Report no. PRR 170, ROSA P. https://rosap.ntl.bts.gov/view/dot/87579.
Researchers, auto manufacturers, technologists and governmental agencies have expressed concern that vehicle automation may necessitate the introduction of added displays to indicate vehicle intent in vehicle-to-pedestrian interactions. Displays of various types have been demonstrated on prototype systems with limited specification around the need
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Reimer, B. (2019). Exploration of Factors Impacting the Successful Adoption of External Vehicle Interfaces (Report No. MITR25-54). New England University Transportation Center. https://rosap.ntl.bts.gov/view/dot/43826
Reimer, Bryan. Exploration of Factors Impacting the Successful Adoption of External Vehicle Interfaces. Report no. MITR25-54. New England University Transportation Center, 2019. https://rosap.ntl.bts.gov/view/dot/43826.
Reimer, Bryan Exploration of Factors Impacting the Successful Adoption of External Vehicle Interfaces. New England University Transportation Center, 2019, Report no. MITR25-54, ROSA P. https://rosap.ntl.bts.gov/view/dot/43826.
The two primary considerations for highway work-zones are its effect on commuter mobility and worker safety which are often spoken of together. However, it must be noted that they conflict with each other. This research aims to study this generally inverse relationship and develop a Decision Support System (DSS) for work-zone traffic control for st
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Louis, J., & Fiawoyife, K. (2019). Commuter Mobility versus Work-zone Safety: An Empirical Study using Data Mining of Anonymous User Generated Trip Information. Pacific Northwest Transportation Consortium (PacTrans) (UTC). https://rosap.ntl.bts.gov/view/dot/55927
Louis, Joseph and Kenny Fiawoyife. Commuter Mobility versus Work-zone Safety: An Empirical Study using Data Mining of Anonymous User Generated Trip Information. Pacific Northwest Transportation Consortium (PacTrans) (UTC), 2019. https://rosap.ntl.bts.gov/view/dot/55927.
Louis, Joseph, and Kenny Fiawoyife Commuter Mobility versus Work-zone Safety: An Empirical Study using Data Mining of Anonymous User Generated Trip Information. Pacific Northwest Transportation Consortium (PacTrans) (UTC), 2019, ROSA P. https://rosap.ntl.bts.gov/view/dot/55927.
Nearly one-third of all rail-related fatalities in the U.S. result from an intentional act of suicide. Rail carrier-based strategies to prevent these incidents are not well understood, and empirical evidence of the effectiveness of known strategies is currently very limited. One such strategy is suicide intervention training to educate rail staff a
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Gabree, S. H., & Hiltunen, D. (2019). Review of Suicide Intervention Training Programs (Report No. DOT/FRA/ORD-19/31). United States. Federal Railroad Administration. Office of Research, Development & Technology. https://rosap.ntl.bts.gov/view/dot/48867
Gabree, Scott H. and Danielle Hiltunen. Review of Suicide Intervention Training Programs. Report no. DOT/FRA/ORD-19/31. United States. Federal Railroad Administration. Office of Research, Development & Technology, 2019. https://rosap.ntl.bts.gov/view/dot/48867.
Gabree, Scott H., and Danielle Hiltunen Review of Suicide Intervention Training Programs. United States. Federal Railroad Administration. Office of Research, Development & Technology, 2019, Report no. DOT/FRA/ORD-19/31, ROSA P. https://rosap.ntl.bts.gov/view/dot/48867.
Goals: Demonstrate shadow QA on projects, perform lab sensitivity analysis, explore forensic applications, and develop test procedure.
Wilson, B., & Sebesta, S. (2019). Qualify High Frequency GPR for Asphalt Mixture Construction (Report No. 0-6874-P6). Texas A&M Transportation Institute. https://rosap.ntl.bts.gov/view/dot/60838
Wilson, Bryan and Stephen Sebesta. Qualify High Frequency GPR for Asphalt Mixture Construction. Report no. 0-6874-P6. Texas A&M Transportation Institute, 2019. https://rosap.ntl.bts.gov/view/dot/60838.
Wilson, Bryan, and Stephen Sebesta Qualify High Frequency GPR for Asphalt Mixture Construction. Texas A&M Transportation Institute, 2019, Report no. 0-6874-P6, ROSA P. https://rosap.ntl.bts.gov/view/dot/60838.
Goals: Develop use of compaction monitoring system (CMS) for evaluation density under the breakdown roller. Using a compaction index (CI) concept. Identify key factors influencing the CI model. Develop updated factors, particularly for temperature and vibration. Identify how CMS could be used for process control or assurance.
Crockford, B., Liu, W., Im, S., & Rew, Y. (2019). Further Technology Readiness of Real-Time Asphalt Mixture Compaction Monitoring (Report No. 0-6874-P4). Texas A&M Transportation Institute. https://rosap.ntl.bts.gov/view/dot/60833
Crockford, Bill, Wenting Liu, Soohyok Im, and Younho Rew. Further Technology Readiness of Real-Time Asphalt Mixture Compaction Monitoring. Report no. 0-6874-P4. Texas A&M Transportation Institute, 2019. https://rosap.ntl.bts.gov/view/dot/60833.
Crockford, Bill, et al. Further Technology Readiness of Real-Time Asphalt Mixture Compaction Monitoring. Texas A&M Transportation Institute, 2019, Report no. 0-6874-P4, ROSA P. https://rosap.ntl.bts.gov/view/dot/60833.
Connected and automated vehicles (CAVs) are becoming increasingly prevalent, bringing with them potential for better safety and mobility. However, these vehicles can create many thousands of transactions in a flash, creating a challenge for current technologies that are not capable of transmitting such big data, privately, and securely. Distributed
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Cao, Y., Kurkcu, A., & Ozbay, K. (2019). Blockchain: A Safe, Efficient Solution for Driver Privacy and Connected Vehicle Transportation Data Sharing. Connected Cities for Smart Mobility toward Accessible and Resilient Transportation Center (C2SMART). https://rosap.ntl.bts.gov/view/dot/49464
Cao, Yingxi, Abdullah Kurkcu, and Kaan Ozbay. Blockchain: A Safe, Efficient Solution for Driver Privacy and Connected Vehicle Transportation Data Sharing. Connected Cities for Smart Mobility toward Accessible and Resilient Transportation Center (C2SMART), 2019. https://rosap.ntl.bts.gov/view/dot/49464.
Cao, Yingxi, et al. Blockchain: A Safe, Efficient Solution for Driver Privacy and Connected Vehicle Transportation Data Sharing. Connected Cities for Smart Mobility toward Accessible and Resilient Transportation Center (C2SMART), 2019, ROSA P. https://rosap.ntl.bts.gov/view/dot/49464.
Of the 4.1 million miles of federal and state highways in the U.S., 2.2 million miles (or 54%) are unpaved, gravel roads. In the Pacific Northwest and Alaska, unpaved gravel roads provide critical transportation access, with some communities relying on just a single highway for access into and out of town. In such cases, these highways become a cri
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Ibrahim, A., Sharma, S., Kassem, E., Nielsen, R., & Nasrin, S. (2019). Operational Safety of Gravel Roads in Rural and Tribal Communities: Vulnerability to Structural Failures and Geo-Hazards (Report No. INE/CSET 20.04). University of Alaska Fairbanks. Center for Safety Equity in Transportation (CSET). https://rosap.ntl.bts.gov/view/dot/60300
Ibrahim, Ahmed, Sunil Sharma, Emad Kassem, Richard Nielsen, and Sabreena Nasrin. Operational Safety of Gravel Roads in Rural and Tribal Communities: Vulnerability to Structural Failures and Geo-Hazards. Report no. INE/CSET 20.04. University of Alaska Fairbanks. Center for Safety Equity in Transportation (CSET), 2019. https://rosap.ntl.bts.gov/view/dot/60300.
Ibrahim, Ahmed, et al. Operational Safety of Gravel Roads in Rural and Tribal Communities: Vulnerability to Structural Failures and Geo-Hazards. University of Alaska Fairbanks. Center for Safety Equity in Transportation (CSET), 2019, Report no. INE/CSET 20.04, ROSA P. https://rosap.ntl.bts.gov/view/dot/60300.
California’s bridges provide vital transportation links, and their seismic performance impacts the entire state and thus, the nation. In order to accurately estimate the response of bridges under earthquake ground motions, highly detailed and accurate Finite Element (FE) models are necessary. While the nonlinear behaviors of most elements can be ca
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Taciroglu, E., & Ghahari, S. F. (2019). Development of Accurate Damping Models for Nonlinear Time History Analysis (Report No. CA18-3018, UCLA SGEL 2019-07). University of California. Dept. of Civil and Environmental Engineering. https://rosap.ntl.bts.gov/view/dot/56462
Taciroglu, Ertugrul and S Farid Ghahari. Development of Accurate Damping Models for Nonlinear Time History Analysis. Report no. CA18-3018, UCLA SGEL 2019-07. University of California. Dept. of Civil and Environmental Engineering, 2019. https://rosap.ntl.bts.gov/view/dot/56462.
Taciroglu, Ertugrul, and S Farid Ghahari Development of Accurate Damping Models for Nonlinear Time History Analysis. University of California. Dept. of Civil and Environmental Engineering, 2019, Report no. CA18-3018, UCLA SGEL 2019-07, ROSA P. https://rosap.ntl.bts.gov/view/dot/56462.
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