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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 3881 - 3900 of 36011 results
  • Traffic Safety Improvements at Low Water CrossingsSummary Webinar
    Traffic Safety Improvements at Low Water Crossings—Summary Webinar
    Dobrovolny, Chiara S ;
    Glancy, Chris
    2021-01-07 | PDF
    The research explored strategies and techniques designed to discourage motorists from entering flooded grade crossings resulting in lives saved • Increased the level of knowledge of TxDOT personnel related to the issues and potential solutions for improving safety at LWCs on TxDOT highways. • The research has the potential to improve the quality of ...
  • 2020 GDOT Employee Survey
    2020 GDOT Employee Survey
    DeMeester, Karen ;
    Simmons, Brian
    2021-01-01 | PDF
    The Georgia Department of Transportation (GDOT) 2020 Employee Survey was performed by a research team that included faculty from the University of Georgia College of Engineering and Carl Vinson Institute of Government, in collaboration with GDOT. The research study aimed to increase the response rate and the usefulness of the feedback from the GDOT ...
  • TOD and ParkandRide Which is Appropriate Where
    TOD and Park-and-Ride: Which is Appropriate Where?
    Niles, John S ;
    Pogodzinski, J M
    2021-01-01 | PDF
    Despite the sharp drop in transit ridership throughout the USA that began in March 2020, two different uses of land near transit stations continue to be implemented in the United States to promote ridership. Since 2010, transit agencies have given priority to multi-family residential construction referred to as transit oriented development (TOD), w ...
  • An Enhanced GDOT Pavement Preservation Guide with Optimal Timing of Pavement Preservation
    An Enhanced GDOT Pavement Preservation Guide with Optimal Timing of Pavement Preservation
    Tsai, Yichang ;
    Wang, Zhaohua
    2021-01-01 | PDF
    The objectives of this research are 1) to develop the first version of the comprehensive pavement preservation guide, covering project selection, specification, material selection, construction procedure, quality assurance (QA)/quality control (QC), along with the Web-based pavement preservation interactive tool (PPIT) that enables Georgia Departme ...
  • 2020 Kentucky Transportation Cabinet Maintenance Customer Survey
    2020 Kentucky Transportation Cabinet Maintenance Customer Survey
    Gibson, Bryan ;
    Connair, Katherine
    2021-01-01 | PDF
    The Kentucky Transportation Cabinet (KYTC) periodically surveys drivers to understand their perceptions of the agency’s maintenance activities. In 2020, Qualtrics in conjunction with the Kentucky Transportation Center surveyed 2,100 licensed drivers throughout the state to gauge their perceptions of highway maintenance, identify areas of strength a ...
  • Integration of Automated Vehicle Sensing with Adaptive Signal Control for Enhanced Mobility
    Integration of Automated Vehicle Sensing with Adaptive Signal Control for Enhanced Mobility
    Smith, Stephen F. ;
    Hawkes, Allen
    2021-01-01 | PDF
    This report summarizes the results of a one-year project aimed at exploiting vehicle-to-infrastructure (V2I) communication to enhance the effectiveness of real-time adaptive traffic signal control systems. As originally formulated, the project’s goal was to explore the potential of using the sensing capabilities of connected autonomous vehicles (CA ...
  • TimeBased Modeling of Concrete Bridge Deck Deterioration Using Probabilistic Models
    Time-Based Modeling of Concrete Bridge Deck Deterioration Using Probabilistic Models
    Guler, S I ;
    Radlinska, Aleksandra
    2021-01-01 | PDF
    This research developed a robust, self-learning, probabilistic model to predict the service life of concrete bridge decks and subsequently other infrastructure components. The model originated from the existing performance data for 22,000 bridge decks in the State of Pennsylvania and utilized advanced statistical tools, including Bayesian probabili ...
  • Bidding of Accelerated Bridge Construction Projects: Case Studies and Consensus Building [supporting datasets]
    Freeseman, Katelyn ;
    Shane, Jennifer S.
    2021-01-01 | ZIP
    Accelerated bridge construction (ABC) is a solution for upgrading substandard bridges that reduces construction and closure times and minimizes exposure of the traveling public and road workers to construction activities. To take full advantage of the benefits of ABC, agencies should decide which projects are appropriate for ABC and how to bid thes ...
    Dataset Supporting Files
  • Impact of Transitways on Travel on Parallel and Adjacent Roads and Parkandride Facilities
    Impact of Transitways on Travel on Parallel and Adjacent Roads and Park-and-ride Facilities
    Webb, Alex ;
    Tao, Tao
    2021-01-01 | PDF
    Transitways such as light rail transit (LRT) and bus rapid transit (BRT) provide fast, reliable, and high-capacity transit service. Transitways have the potential to attract more riders and take a portion of the automobile mode share, reducing the growth of automobile traffic. Park-and-ride (PNR) facilities can complement transit service by providi ...
  • Investigating Potential Solutions to the Barrier Effect of Interstate 80 on Pronghorn Movements
    Investigating Potential Solutions to the Barrier Effect of Interstate 80 on Pronghorn Movements
    Robb, Benjamin S ;
    Rudd, William J
    2021-01-01 | PDF
    Pronghorn rely on long-distance migrations to access seasonal resources and mitigate the consequences of severe winters and droughts. When barriers sever routes to alternative habitats then pronghorn populations may decline as a result of loss of habitat. Wyoming highways and interstates include woven-wire ROW fencing along the road. Such fencing c ...
  • Guidance for Evaluating Traffic Safety Culture Strategies
    Guidance for Evaluating Traffic Safety Culture Strategies
    Austin, Eric ;
    Otto, Jay
    2021-01-01 | PDF
    This project conducted a literature review of current practices in the evaluation of traffic safety culture strategies. This review focused on transportation safety literature but also extended to evaluating safety culture in other public health sectors. A description of the literature was provided as a report, which was also converted to a journal ...
  • Improving the Foundation Layers for Concrete Pavements Lessons Learned and a Framework for Mechanistic Assessment of Pavement Foundations
    Improving the Foundation Layers for Concrete Pavements: Lessons Learned and a Framework for Mechanistic Assessment of Pavement Foundations
    White, David J. ;
    Vennapusa, Pavana K. R.
    2021-01-01 | PDF
    This report summarizes the key findings and lessons learned from the series of field, laboratory, and advanced numerical studies performed under Federal Highway Administration (FHWA) Transportation Pooled Fund Study TPF-5(183). This research program was established by the partnering state departments of transportation (DOTs) to identify opportuniti ...
  • GTFSRide Transit Ridership Data Standard Ecosystem Development
    GTFS-Ride: Transit Ridership Data Standard Ecosystem Development
    Porter, J. David ;
    Carleton, Phillip
    2021-01-01 | PDF
    This report documents the results of a research project whose objective was to build on the results of project SPR 803 to identify the value proposition for adoption of the GTFS-ride data standard and to continue to develop an ecosystem of supporting software tools. By completing this project, the current state of practice, level of technical capab ...
  • Hierarchical Prioritybased Control of Signalized Intersections in SemiConnected Corridors
    Hierarchical Priority-based Control of Signalized Intersections in Semi-Connected Corridors
    Hajbabaie, Ali ;
    Mehrabipour, Mehrzad
    2021-01-01 | PDF
    In this project, the authors developed an efficient distributed yet coordinated algorithm to control signalized intersections in connected and semi-connected corridors. The research enhances traffic signal optimization formulations to allow for the incorporation of connected vehicles and existing point detector data in the models, the distribution ...
  • Promoting the Transportation Systems Management and Operations Program in Kansas
    Promoting the Transportation Systems Management and Operations Program in Kansas
    Kondyli, Alexandra ;
    Schrock, Steven D.
    2021-01-01 | PDF
    This research investigated the current level of Transportation Systems Management and Operations (TSMO) implementation and integration within the Kansas Department of Transportation (KDOT) at the headquarters and all areas and districts in Kansas. This investigation is of particular importance to KDOT because it will initiate implementation of a st ...
  • Access to Opportunities Primer
    Access to Opportunities Primer
    Bhusal, Samikchhya ;
    Blumenberg, Evelyn
    2021-01-01 | PDF
    Transportation allows people to reach the opportunities that they need to participate in social and economic life. It enables workers to get to jobs to earn a living, students to get to school to obtain an education, or people to see a doctor to get healthy. But for people who lack transportation, whether it be because they do not own vehicles or b ...
  • Global Disruptions in the Transportation Sector The Effect of Ridehailing Services and the COVID19 Pandemic
    Global Disruptions in the Transportation Sector: The Effect of Ridehailing Services and the COVID-19 Pandemic
    Malik, Jai
    ORCID ICON IMG
    2021-01-01 | PDF
    In this study we explore the factors that affect the use of ridehailing services (Uber, Lyft) as well as adoption of shared (pooled) ridehailing (UberPOOL, Lyft Share) using data collected in California in fall 2018 using cross-sectional travel surveys. We estimate a semi-ordered bivariate probit model using this dataset. Among other findings, the ...
  • Modeling Operational Performance of Urban Roads with Heterogeneous Traffic Conditions
    Modeling Operational Performance of Urban Roads with Heterogeneous Traffic Conditions
    Kodupuganti, Swapneel R ;
    Mathew, Sonu
    2021-01-01 | PDF
    The rapid growth in population and related demand for travel during the past few decades has had a catalytic effect on traffic congestion, air quality, and safety in many urban areas. Transportation managers and planners have planned for new facilities to cater to the needs of users of alternative modes of transportation (e.g., public transportatio ...
  • Effectiveness of Entertaining NonTrafficRelated Messages on Dynamic Message Signs
    Effectiveness of Entertaining, Non-Traffic-Related Messages on Dynamic Message Signs
    Kondyli, Alexandra ;
    Schrock, Steven D.
    2021-01-01 | PDF
    This research used a fixed-base driving simulator to determine the effects of dynamic message signs (DMSs) on driver behavior. A DMS notifies drivers with safety, weather, incident, or traffic condition messages. Recently, however, state Departments of Transportation (DOTs) display safety messages with entertaining content. The Kansas DOT (KDOT) wa ...
  • Application of Industrial Ecology Principles in the Bioenergy Sector in California
    Application of Industrial Ecology Principles in the Bioenergy Sector in California
    Ro, Jin Wook
    2021-01-01 | PDF
    Bioenergy has long been a promising solution to reduce the greenhouse gas (GHG) emissions from the transportation, electric power, and natural gas sectors, and thus, it has been promoted by policies in the interest of climate change mitigation globally. In the United States, environmental policies such as the federal Renewable Fuel Standard (RFS) a ...
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