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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 2041 - 2060 of 36873 results
  • Division of Engineering Research OnCall Roc Agreement 34652 Task 11 Initial Guidance and Recommendations for Climate Informed Science Design Approach
    Division of Engineering Research On-Call (Roc), Agreement #34652. Task 11, Initial Guidance and Recommendations for Climate Informed Science Design Approach
    Bishop, Daniel ;
    Carpenter, Noah
    2023-10-01 | PDF
    A review of climate science reports relevant to extreme precipitation planning for their appropriateness and application to extreme precipitation design was completed for the Ohio Department of Transportation (ODOT) Office of Hydraulic Engineering. The report responds to questions posed by ODOT related to the climate science reports, encompassing a ...
  • Wetland Plant Species Composition Influences Site Water Use
    Wetland Plant Species Composition Influences Site Water Use
    Wright, Anna ;
    Sueltenfuss, Jeremy
    2023-10-01 | PDF
    The Colorado Department of Transportation (CDOT) is one of the leading organizations in wetland mitigation within the state of Colorado. In an effort to optimize and prioritize their mitigation activities, and to ensure they do not infringe on Colorado Water Law nor downstream water rights, CDOT was interested in understanding the water use of rest ...
  • Connected Autonomous Shuttle Supporting Innovation CASSI in Carys Bond Park
    Connected Autonomous Shuttle Supporting Innovation (CASSI) in Cary’s Bond Park
    Searcy, Sarah ;
    Curran, Shelley
    2023-10-01 | PDF
    The North Carolina Department of Transportation (NCDOT) partnered with Cary, NC (Cary) and Beep, Inc. (Beep) to bring a novel-design, all-electric, low-speed automated shuttle to Fred G. Bond Metro Park (Bond Park) in Cary for a 13-week pilot through the Connected Autonomous Shuttle Supporting Innovation (CASSI) program. Beep operated a Navya Auton ...
  • Domestic Airline Fares Consumer Report Second Quarter 2023 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: Second Quarter 2023 Passenger and Fare Information
    United States. Department of Transportation
    2023-10-01 | Domestic Airline Fares Consumer Report | PDF
    Each month the Department of Transportation releases an Air Travel Consumer Report that includes information about various service quality elements, including flight delays, mishandled baggage, over sales, and a variety of other types of consumer complaints. In response to an increasing number of inquiries from consumers about domestic airline pric ...
  • Effect of Longitudinal Joint Construction and Density on Asphalt Pavement Performance Phase I State of the Practice
    Effect of Longitudinal Joint Construction and Density on Asphalt Pavement Performance – Phase I – State of the Practice
    Akentuna, Moses ;
    Salari, Saman
    2023-10-01 | PDF
    The construction of longitudinal joints to specified densities significantly impacts the performance and service life of asphalt pavements. Ensuring proper compaction is essential to creating impermeable joints that can withstand water infiltration, prevent moisture damage, and enhance long-term performance. Various entities, including state depart ...
  • Drainage 101 Understanding and Managing Drainage Issues Implementation Summary
    Drainage 101: Understanding and Managing Drainage Issues [Implementation Summary]
    Arvidson, Tim ;
    Bot, Steve
    2023-10-01 | PDF
    This Implementation Summary relations to Report 2023RIC08, published April 2023.
  • District Highway Maintenance Research OnCall ROC Task 4 Best Practices for Using Slag in Chip Seal Treatments
    District Highway Maintenance Research On-Call (ROC) Task 4: Best Practices for Using Slag in Chip Seal Treatments
    Abbas, Ala R. ;
    Nazzal, Munir
    2023-10-01 | PDF
    This research-on-call (ROC) task was conducted to assist the Ohio Department of Transportation (ODOT) in gaining a better understanding of slag materials that can be used as chip seal aggregates and the potential benefits and drawbacks from using these materials with chip seal treatments. An online survey was conducted in this study to gather infor ...
  • Evaluation of Software Platforms for Transit Service Planning for Potential Statewide Applications Summary
    Evaluation of Software Platforms for Transit Service Planning for Potential Statewide Applications [Summary]
    Gan, Albert ;
    Matthews, Gabrielle
    2023-10-01 | PDF
    Transit agencies are increasingly using commercially available software platforms to assist in their service planning. These platforms vary in their applications, functionalities, and capabilities, among others. This project includes three focuses: (1) identifies and evaluates existing software platforms used by transit agencies for transit service ...
  • Financial Achievability Model Operationalization Case Studies and Analysis Summary
    Financial Achievability Model: Operationalization Case Studies and Analysis [Summary]
    Tuck, Jason ;
    Schriefer, Patricia (Born)
    2023-10-01 | PDF
    In a prior research project (BDK83 977-24), the Financial Achievability Model (FAM) was created for the Florida Department of Transportation Research Center. The Research Center can use the FAM in all phases of research to meet strategic objectives, including demonstrating the potential benefits of proposed projects, allowing for a more cost-effect ...
  • Effectiveness of Contrast Markings on Roadways and Orange Markings in Work Zones
    Effectiveness of Contrast Markings on Roadways and Orange Markings in Work Zones
    Williamson, Michael ;
    Lin, Ping
    2023-10-01 | PDF
    Lane departure crashes are a leading cause of fatalities and injury crashes on roadways. To solve this problem, innovative marking in the form of contrasted white on concrete sections and orange marking in work zones were evaluated for their safety benefits. A highway safety manual approach was taken to evaluate the crash reduction benefits from ea ...
  • Evaluation of Upgraded Head Restraints FMVSS 202a
    Evaluation of Upgraded Head Restraints: FMVSS 202a
    Díaz, E Acevedo
    2023-10-01 | PDF
    Beginning with vehicle model year 2010, FMVSS 202a established new requirements for head restraints in passenger vehicles. This study evaluates the effectiveness of head restraints in reducing cervical spine injuries, including whiplash injuries, for passenger vehicle occupants using NHTSA’s National Automotive Sampling System Crashworthiness Data ...
  • Transportation Equity Training for MnDOT Employees
    Transportation Equity Training for MnDOT Employees
    Abdulle, Abdullahi
    2023-10-01 | PDF
    Construction of freeways in the 1960s displaced thousands of homes and businesses as neighborhoods were cut in two or cleared. Primarily Black communities suffered significant economic burden and social impacts. Interstate 35W (I-35W), I-94 and State Highway 55, for example, cut through the Twin Cities in areas that were home to 82% of the city’s B ...
  • Traffic Safety Evaluation of Pedestrians and Bicyclists at Roundabouts in Minnesota
    Traffic Safety Evaluation of Pedestrians and Bicyclists at Roundabouts in Minnesota
    Wagner, Mark ;
    Leuer, Derek
    2023-10-01 | PDF
    By the end of 2022, nearly 450 roundabouts were installed on Minnesota roadways. An evaluation of traffic safety at roundabouts published by MnDOT in 2017 showed substantial decreases in fatal and serious injury crashes for all users at intersections after installation of a roundabout. The safety effects of roundabouts are largely due to geometric ...
  • Utilization of UHPC Bridge Superstructures in Texas Volume 1 UHPC Mixture Development and MaterialLevel Experiments
    Utilization of UHPC Bridge Superstructures in Texas— Volume 1: UHPC Mixture Development and Material-Level Experiments
    Hueste, Mary Beth D. ;
    Mukhopadhyay, Anol
    2023-10-01 | PDF
    The use of ultra-high performance concrete (UHPC) in Texas bridges has the potential to add substantial improvements to bridge construction. Advanced material properties and superior durability of UHPC can result in significant design and construction benefits. Within this context, this project evaluated the application of UHPC for precast, pretens ...
  • Bicycle and Pedestrian Safety Research Project
    Bicycle and Pedestrian Safety Research Project
    Jackson, Steve ;
    Raymond, Paula
    2023-10-01 | PDF
    Crash typing is the process of analyzing crash details to categorize crashes into similar groups, which can help identify hotspots, rising problems, and deploy the most effective countermeasures. This research analyzed crashes involving motor vehicles and bicycles or pedestrians in Idaho between 2012 and 2021. Using the PBCAT2 methodology, with sup ...
  • Exploring Agar as a Sustainable Alternative to PetroleumBased Binders
    Exploring Agar as a Sustainable Alternative to Petroleum-Based Binders
    Frey, Melissa R. ;
    Torres-Machi, Cristina
    2023-10-01 | PDF
    Over 90% of paved roads in the United States are surfaced with asphaltic materials comprised of aggregate and a non-renewable petroleum-based asphalt binder. The sourcing of such a vital civil engineering material is both environmentally(i.e., contributing to pollution as well as greenhouse gas and volatile organic compound emissions) and economica ...
  • Effectively Implementing Machine Learning with Office of Materials Technology
    Effectively Implementing Machine Learning with Office of Materials Technology
    Zhang, Yunfeng ;
    Xu, Jianshu
    2023-10-01 | PDF
    Machine learning models provide significant value for planning and asset management purposes by maximizing the usefulness of past data collection for decision-making and policy development. Newer and more powerful machine learning models not available in previous applications and research in highway transportation fields are investigated to address ...
  • Effectively Implementing Machine Learning with Office of Materials Technology Research Summary
    Effectively Implementing Machine Learning with Office of Materials Technology [Research Summary]
    Zhang, Yunfeng
    2023-10-01 | PDF
    Machine learning models provide significant value for planning and asset management purposes by maximizing the usefulness of past data collection for decision-making and policy development. Newer and more powerful machine learning models not available in previous applications and research in highway transportation fields are investigated to address ...
  • Erosion Resistant Rock Shoulder
    Erosion Resistant Rock Shoulder
    Song, Chung R. ;
    Wood, Richard L.
    2023-10-01 | PDF
    Highway shoulder rocks are exposed to continuous erosion force due to unexpected floodings caused by climate change. The evaluation methods of the erosion resistance of highway shoulder rocks are not currently well-developed. This study developed a new large-scale testing device, the University of Nebraska-Lincoln Erosion Testing Bed (UNLETB), whic ...
  • Effective PedestrianNonMotorized Crossing Enhancements Along Higher Speed Corridors
    Effective Pedestrian/Non-Motorized Crossing Enhancements Along Higher Speed Corridors
    Houten, Ron Van ;
    Kwigizile, Valerian
    2023-09-30 | PDF
    The purpose of this research was to examine crashes along higher speed roads (speed limit of 45 mph or more) excluding freeways, at signalized and unsignalized locations, determine predominant causes of these crashes, and to identify countermeasures for these crashes. Assessment of high crash corridors included an examination of the number of crash ...
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