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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.

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Showing 3521 - 3540 of 36151 results
  • Use of Flashing AmberWhite Lights on Paving Equipment in Work Zones
    Use of Flashing Amber-White Lights on Paving Equipment in Work Zones
    Hurwitz, David ;
    Gambatese, John A.
    2021-07-01 | PDF
    Safety treatments to mitigate speeding inside work zones is of perennial interest among construction partners. Prior research by ODOT and OSU captured the effect of flashing blue lights on speeding behavior. This study extended that effort to evaluate flashing amber and white lights. Three case studies were conducted on Interstates 5 and 205 during ...
  • Cognitive Attention and Its Application in Countermeasures on a Curve Section
    Cognitive Attention and Its Application in Countermeasures on a Curve Section
    Shen, Junan ;
    Gao, Weinan
    2021-07-01 | PDF
    To reduce crashes and improve traffic safety on roads, this project explored a methodology of evaluating the safety countermeasures based on cognitive attention and driving performance with eye-tracking and driving simulation technologies and comprehensive analysis of eye movements, driving performance, and short-term memory. An experiment for data ...
  • An Enhanced NetworkLevel Curve Safety Assessment and Monitoring Using Mobile Devices
    An Enhanced Network-Level Curve Safety Assessment and Monitoring Using Mobile Devices
    Tsai, Yichang (James) ;
    Yu, Pingzhou Lucas
    2021-07-01 | PDF
    A disproportionally high number of serious vehicle crashes (25% of fatal crashes) occur on horizontal curves, even though curves represent only a fraction of the roadway network (5% of highway miles) (FHWA, 2021; Atkinson et al., 2016). The in-service curve characteristics information, including curve radius, superelevation, and BBI angles, are ext ...
  • Where are Used Electric Vehicles and Who are the Buyers
    Where are Used Electric Vehicles and Who are the Buyers?
    Tal, Gil ;
    Lee, Jae Hyun
    2021-07-01 | PDF
    Very little research has been conducted on the second (and third, and thereafter) owners of new technologies. For light duty vehicles, the research has been focused on the first owners. In the case of plug-in electric vehicles (PEVs), understanding the secondary market is especially important for many reasons, including the vehicle market developme ...
  • No Ticket To Ride A Systematic Definition of Transit Insecurity
    No Ticket To Ride: A Systematic Definition of Transit Insecurity
    Nathan-Roberts, Dan ;
    Friedman-Biglin, Noah
    2021-07-01 | PDF
    The ability of persons and communities to reliably access transit is a pressing one that has not yet received significant attention in the literature on city planning, in public discourse, or in policy research. This scoping review focuses on factors that negatively impact a person or community’s ability to have reliable access to transit; we call ...
  • Guidance on Messaging to Avoid Psychological Reactance and Address Moral Disengagement
    Guidance on Messaging to Avoid Psychological Reactance and Address Moral Disengagement
    Otto, Jay ;
    Finley, Kari
    2021-07-01 | PDF
    The purpose of this project was to determine if the prevalence of psychological reactance and moral disengagement are higher among adult drivers who never or rarely wear their seat belts or who drive aggressively (i.e., speed, follow too closely, and pass excessively) and to identify potential messaging to minimize reactance and overcome moral dise ...
  • Race Class and the Production of and Exposure to Vehicular Pollution in Los Angeles
    Race, Class, and the Production of and Exposure to Vehicular Pollution in Los Angeles
    Boeing, Geoff ;
    Lu, Yougeng
    2021-07-01 | PDF
    Vehicular air pollution has created an ongoing public health crisis. Despite growing knowledge of racial injustice in exposure to vehicular particulate matter (PM2.5), less is known about the socio-demographics-mediated relationship between the production of and exposure to such pollution. This study assesses pollution burden with a unified indicat ...
  • Florida and Louisiana 2021 Peer Exchange Peer Exchange ataGlance The Effects of COVID19 on Research and Technology Transfer Process
    Florida and Louisiana 2021 Peer Exchange: Peer Exchange at-a-Glance: The Effects of COVID-19 on Research and Technology Transfer Process
    Florida. Department of Transportation  ...
    2021-07-01 | PDF
    The objectives of this peer exchange were to study the effects of COVID-19 on research delivery, technology transfer, and research operations. It was hosted by the Florida Department of Transportation (Florida DOT) and Louisiana Louisiana Department of Transportation and Development on July 20 and 21, 2021, in a virtual Zoom meeting. Guest agencies ...
  • Technology Review and Roadmap for Inventorying Complete Streets for Integration Into Pavement Asset Management Systems
    Technology Review and Roadmap for Inventorying Complete Streets for Integration Into Pavement Asset Management Systems
    Gadsby, April ;
    Tsai, Yichang (James)
    2021-07-01 | PDF
    Complete Streets provide mobility for all modes of transportation including active transportation. Complete Streets are being implemented in the US and transportation agencies must maintain these assets, which requires bringing them into asset management systems. Many gaps exist to include Complete Streets in asset management, and there is no compr ...
  • Speed Variation and Safety in Work Zones
    Speed Variation and Safety in Work Zones
    Gambatese, John A. ;
    Jin, Ziyu
    2021-07-01 | PDF
    In addition to lower speeds, the difference between vehicle speed and the average speed on the roadway has been identified as a factor in roadway crashes. For work zones, the potential for such speed variation from the average speed is magnified. The safety associated with speed variation in work zones affects both motorists driving through the wor ...
  • Division of Engineering Research on Call Agreement 34652 Task 1 Strength Reduction Method SRM Evaluation
    Division of Engineering Research on Call, Agreement #34652. Task 1, Strength Reduction Method (SRM) Evaluation
    Narsavage, Peter ;
    Pradel, Daniel
    2021-07-01 | PDF
    The Ohio Department of Transportation (ODOT) wishes to compare their current industry standard landslide stabilization analysis method using traditional Limit Equilibrium Methods (LEM) to the Strength Reduction Method (SRM) of stability analysis, by reanalyzing two landslide projects with various SRM and LEM software packages and comparing the resu ...
  • Methods To Analyze and Predict Interstate Travel Time Reliability
    Methods To Analyze and Predict Interstate Travel Time Reliability
    Zhang, Xiaoxiao ;
    Zhao, Mo
    2021-07-01 | PDF
    The Moving Ahead for Progress in the 21st Century Act (MAP-21) defined requirements for system reliability performance measures. Under MAP-21, state departments of transportation are responsible for reporting travel time reliability and for setting targets and showing progress toward those targets. In order to know how to improve travel time reliab ...
  • Evaluation of Roadway Concrete Barriers and Materials
    Evaluation of Roadway Concrete Barriers and Materials
    Shahriari, Vista ;
    Prabhakar, Pavana
    2021-07-01 | PDF
    The research objective was to investigate the causes and sources of distress observed in single-slope slip-formed roadway concrete barriers with the goal of developing strategies to ensure the long-term performance of these barriers in Wisconsin. To that end, barriers built between 2012 and 2015 and located in three different regions of WI were stu ...
  • Using Data Analytics in Forecasting Bridge Condition
    Using Data Analytics in Forecasting Bridge Condition
    Bell, Erin ;
    Kwiatkowski, Kyle
    2021-07-01 | PDF
    Reliable data-driven forecasting models allow for public agencies to plan for future needs and resource allocation. Conditions of bridge assets are managed through maintenance, preservation, rehabilitation and reconstruction. The New Hampshire Department of Transportation documents the appropriate timing of these treatments in Recommended Investmen ...
  • Performance of Interstate Rubblization in Illinois
    Performance of Interstate Rubblization in Illinois
    Lippert, David L. ;
    Thompson, Marshall R.
    2021-07-01 | PDF
    In Illinois, hot-mix asphalt overlaid concrete pavements typically exhibit reflective cracking of joints and cracks from the pavement below, resulting in shortened life and maintenance issues. Over the years, various patching, fabric, and crack and seat techniques were attempted with few positive results. This led to more aggressive techniques to e ...
  • Identifying and Prioritizing Target Regions to Conduct Outreach Activities to Improve Safety and Mobility of Aging Population
    Identifying and Prioritizing Target Regions to Conduct Outreach Activities to Improve Safety and Mobility of Aging Population
    Alluri, Priyanka ;
    Kodi, John
    2021-07-01 | PDF
    Florida leads the nation with over 20% of the population age 65 years and older, and this percentage is expected to continue to grow. As part of the strategies to improve the safety and mobility of the aging population, this research project developed a Geographic Information System (GIS)-based approach to identify and prioritize target regions to ...
  • Bump at the End of the Bridge Enhanced Remediation Decision Making via 3D Measurement and Advanced 3D Dynamic Analysis
    Bump at the End of the Bridge: Enhanced Remediation Decision Making via 3D Measurement and Advanced 3D Dynamic Analysis
    Camp, Charles V ;
    Pezeshk, Shahram
    2021-07-01 | PDF
    The Tennessee Department of Transportation (TDOT) and transportation departments across the country have long recognized that approach slabs and pavements at bridges are prone to both settlement and cracking, which have been widely recognized as the "bump at the end of the bridge" (BEB). This study seeks to provide guidance and aid TDOT officials i ...
  • Pollinator Habitat Along Highway Right of Way
    Pollinator Habitat Along Highway Right of Way
    Trauth, Kathleen M. ;
    Aloysius, Noel R
    2021-07-01 | PDF
    Pollinators are important components of our ecosystems, as well as being important contributors to agricultural production. Highway right of way (ROW) is one potential habitat for pollinators. The objectives of this study were to assess existing practices of other agencies for promoting pollinator habitat within the ROW and to identify potential lo ...
  • Harnessing Solar Energy Through Noise Barriers and Structural Snow Fencing
    Harnessing Solar Energy Through Noise Barriers and Structural Snow Fencing
    Yang, Mijia ;
    Yu, Yao
    2021-07-01 | PDF
    This research studied the possibility of harnessing solar energy through right-of-way associated structures, such as noise barriers and snow fences. A detailed survey was conducted of the general public, farmers, and utility companies to determine their acceptance of such an initiative. A large percentage of the general public, farmers, and utility ...
  • Balanced Asphalt Concrete Mix Performance in Utah Phase V Field Evaluation for Intermediate and LowTemperature Cracking
    Balanced Asphalt Concrete Mix Performance in Utah. Phase V: Field Evaluation for Intermediate and Low-Temperature Cracking
    Romero, Pedro
    2021-07-01 | PDF
    A follow-up study was conducted in which the performance of five asphalt pavements was documented after three years of field service in Utah. Cores were taken at each pavement section and brought to the lab where they were cut and tested using the BBR, the IFIT, and the IDEAL CT. The respective performance indices from these tests were compared to ...
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