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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 1961 - 1980 of 36873 results
  • Evaluating and Communicating the Value of Research Brochure and Task Checklists Factsheet
    Evaluating and Communicating the Value of Research Brochure and Task Checklists [Factsheet]
    Minnesota Local Road Research Board
    2023-11-01 | PDF
    This brochure accompanies Report 2023-39, "Evaluating and Communicating the Value of Research," published November 2023.
  • US191MT64 Wildlife Transportation Assessment
    US-191/MT-64 Wildlife & Transportation Assessment
    Fairbank, Elizabeth R. ;
    Penrod, Kristeen
    2023-11-01 | PDF
    The US Highway 191 (US-191)/Montana Highway 64 (MT-64) Wildlife & Transportation Assessment (the “Assessment”) improves understanding of the issues affecting driver safety, wildlife mortality, and wildlife movement along the major routes that connect Yellowstone National Park, the Custer Gallatin National Forest, and other public lands to the growi ...
  • Develop Bridge WeighinMotion Approach To Measure Live Loads on Texas Highways Technical Report
    Develop Bridge Weigh-in-Motion Approach To Measure Live Loads on Texas Highways: Technical Report
    Yarnold, Matthew ;
    Shi, Shengyi
    2023-11-01 | PDF
    This research study developed and quantitatively evaluated the concept of Bridge Weigh-In-Motion (B-WIM) for future application on Texas highways. The primary objective of B-WIM systems is to instrument a bridge to obtain the axle information (i.e., weights, number, speed, and spacings) and weight information (i.e., axles and gross) of trucks that ...
  • Bridge and Culvert Designs for Reduced WildlifeVehicle Conflicts and Improved Climate Resiliency Phase I
    Bridge and Culvert Designs for Reduced Wildlife-Vehicle Conflicts and Improved Climate Resiliency: Phase I
    Gómez, Alejandra ;
    Maerz, John
    2023-11-01 | PDF
    Wildlife vehicle conflicts (WVC) average over 14,000 crashes and cost more than $850M per year in Georgia (FHWA 2023). Our research team has undertaken a Phase I study to identify opportunities to simultaneously improve road safety, reduce wildlife vehicle conflicts (WVC), effectively ensure water and debris conveyance capacity, enhance ecosystem c ...
  • Determining the Effect on Asphalt Mixture Performance by Increasing New Asphalt Binder Content Due to Inactive RAP Binder in the Mixture
    Determining the Effect on Asphalt Mixture Performance by Increasing New Asphalt Binder Content Due to Inactive RAP Binder in the Mixture
    Yin, Fan ;
    Taylor, Adam
    2023-11-01 | PDF
    The project aimed to determine the impact of adding additional virgin binders in consideration of recycled binder availability (RBA) on the performance of asphalt mixtures containing reclaimed asphalt pavements (RAP). To that end, a literature review was first conducted to select a suitable RBA value (i.e., 80%) for RBA mixtures in Florida, followe ...
  • Montana Department of Transportation Research Peer Exchange Summary Report September 1213 2023
    Montana Department of Transportation Research Peer Exchange Summary Report (September 12–13, 2023)
    Walker-Keleher, Peter ;
    Eslinger, Shari
    2023-11-01 | PDF
    The Montana Department of Transportation (MDT) hosted a research peer exchange in Helena, Montana, on September 12-13, 2023. The objectives for this peer exchange were to identify actionable improvements to implement or change in the beginning (idea of contract) and the end of (research conclusion to implementation) of the research business process ...
  • Response of San Joaquin Kit Foxes to Road Construction Project Sites Mitigation Strategies to Minimize Project Delays and Impacts
    Response of San Joaquin Kit Foxes to Road Construction Project Sites: Mitigation Strategies to Minimize Project Delays and Impacts
    Cypher, Brian ;
    Noel, Erika
    2023-11-01 | PDF
    The California Department of Transportation (Caltrans) occasionally conducts construction projects within the range of the San Joaquin kit fox (Vulpes macrotis mutica), which is a Federally Endangered and California Threatened species. Caltrans routinely implements mitigation measures to avoid or minimize adverse impacts to kit foxes. However, kit ...
  • Speed Limit Change 55 mph to 60 mph Safety ReEvaluation
    Speed Limit Change (55 mph to 60 mph) Safety Re-Evaluation
    Saleem, Taha ;
    Srinivasan, Raghavan
    2023-11-01 | PDF
    The objective of this study was to evaluate the safety impacts of increasing the speed limit from 55 mph to 60 mph on twolane, two-way state highway road segments in Minnesota. An empirical Bayes (EB) before-after analysis was used to estimate crash modification factors (CMFs) for both segments and intersections. The segment analysis showed an 8 pe ...
  • Evaluation of Crumb Rubber Modification of Louisiana Mixtures Technical Summary
    Evaluation of Crumb Rubber Modification of Louisiana Mixtures [Technical Summary]
    Salari, Saman ;
    Cooper III, Samuel
    2023-11-01 | PDF
    The objective of this research was to evaluate the effect of CR modification on the performance of asphalt mixtures used in Louisiana.
  • Evaluating Benefits of Stratifying Cost of Injuries by Severity in CDOT BenefitCostAnalysis
    Evaluating Benefits of Stratifying Cost of Injuries by Severity in CDOT Benefit-Cost-Analysis
    McCarthy, Gillian ;
    Kononov, Jake
    2023-11-01 | PDF
    The aim of this study was to investigate whether stratifying the degree of injury by severity and assigning specific dollar costs to each severity level would enhance the quality of project selection. The results strongly suggest a distinction between a composite and a stratified approach in allocating injury crash costs within a Benefit Cost Analy ...
  • Fatality Reductions Abroad A Survey of Success From Foreign Jurisdictions
    Fatality Reductions Abroad: A Survey of Success From Foreign Jurisdictions
    Burbidge, Shaunna K. ;
    Anderson, Camille
    2023-11-01 | PDF
    Despite intensive efforts on the part of the Utah Department of Transportation (UDOT) and Vision Zero, fatalities in the state of Utah have seen only a modest decrease, with the most recent years exhibiting an uptick in fatalities. Achieving a goal of zero road fatalities is of great importance to UDOT. Using an extensive network of contacts abroad ...
  • Driver Behavior and Performance in HightoLow Speed Transition Zones
    Driver Behavior and Performance in High-to-Low Speed Transition Zones
    Srinivasan, Raghavan ;
    Chakraborty, Meghna
    2023-11-01 | PDF
    This study compiled site characteristics from 338 transition zones in North Carolina. Out of these locations, speed data were compiled from 50 locations (for 37 locations, speed data were compiled in the field; for the remaining 13 locations, INRIX was used to compile the data). These 50 locations represented 9 different categories of speed limit t ...
  • Evaluation of Crumb Rubber Modification of Louisiana Mixtures
    Evaluation of Crumb Rubber Modification of Louisiana Mixtures
    Salari, Saman ;
    Mata, David
    2023-11-01 | PDF
    Since 2008, the Louisiana Department of Transportation and Development (DOTD) has permitted the use of crumb rubber modifiers (CRM) in hot mix asphalt (HMA) mixtures in accordance with its specifications. However, crumb rubber (CR)modification has presented unique challenges during the design and production of the mixtures. Louisiana DOTD district ...
  • Highway Safety Culture Assessment through Louisianas Regions
    Highway Safety Culture Assessment through Louisiana’s Regions
    Schneider, Helmut ;
    Smith, Scott
    2023-11-01 | PDF
    Human behavior and errors in human judgment account for a large proportion of roadway crashes in the United States. Most priorities in Louisiana’s Strategic Highway Safety Plan involve human behavior. A comprehensive understanding of highway safety culture throughout Louisiana’s regions will enhance the state’s public outreach and education efforts ...
  • Evaluation of NearMiss Crashes Using a VideoBased Tool Summary
    Evaluation of Near-Miss Crashes Using a Video-Based Tool [Summary]
    Kondyli, Alexandra ;
    Schrock, Steven D.
    2023-11-01 | PDF
    This research investigated the prediction accuracy of a video-based tool developed by Transoft Solutions for predicting near-miss crashes at signalized intersections. The research team selected two signalized intersections in Overland Park, Kansas, and collected two weeks of video data from both locations. Only weekday data were collected for the t ...
  • OSTR Research Roundup Newsletter November 2023
    OST-R Research Roundup Newsletter: November 2023
    United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
    2023-11-01 | OST-R Research Roundup | PDF
    News from across OST-R and its research community.
  • Exploration of Drone and Remote Sensing Technologies in Highway Embankment Monitoring and Management Phase I Report
    Exploration of Drone and Remote Sensing Technologies in Highway Embankment Monitoring and Management (Phase I) [Report]
    Zhang, Zhongjie ;
    Chen, Qiming
    2023-11-01 | PDF
    Monitoring the spatial-temporal variation of surface moisture content in highway soil embankment/dam has a practical implication for earth embankment/dam safety. The knowledge of soil moisture content on the surface of earth embankment/dams can help engineers monitor the dynamic evolvement of slope stability due to the adverse effect of excessive m ...
  • A Synthesis of Economic Impact Assessment of Transit Services
    A Synthesis of Economic Impact Assessment of Transit Services
    Peng, Zhong-Ren ;
    Liu, Yanghe
    2023-11-01 | PDF
    This report provides an in-depth synthesis of the economic impact assessment of transit services in the United States from 2003 to 2023, focusing on Benefit-Cost Analysis (BCA) and Economic Impact Analysis (EIA) methodologies. It examines their application in public transit systems and highlights geographical variations and trends. The report analy ...
  • BMP For Issues with Asphalt Centerline Joint and Intelligent Compaction for Local Agencies
    BMP For Issues with Asphalt Centerline Joint and Intelligent Compaction for Local Agencies
    Haider, Syed W. ;
    Muslim, Hamad Bin
    2023-11-01 | PDF
    It is well-known that longitudinal joint construction quality is critical to flexible pavement life. The maintenance activities caused by longitudinal joint deterioration's direct or indirect effects and raveling problems along the centerline paving joint of asphalt roadways have become challenging for many highway agencies. A poorly constructed jo ...
  • Evaluating and Communicating the Value of Research
    Evaluating and Communicating the Value of Research
    Saeedi, Rahil ;
    Yuan, Jia
    2023-11-01 | PDF
    In FY2022, the MnDOT Office of Research and Innovation managed a total of 215 active and completed projects, of which 75 received partial or full funding from the Local Road Research Board (LRRB). Evaluating the benefits of this research and effectively communicating the benefits to diverse audiences serves several important purposes. It helps both ...
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