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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 2221 - 2240 of 36114 results
  • The Economic and Societal Impact of Motor Vehicle Crashes 2019 Revised
    The Economic and Societal Impact of Motor Vehicle Crashes, 2019 (Revised)
    Blincoe, Lawrence J. ;
    Miller, Ted R
    2023-02-01 | PDF
    In 2019 there were 36,500 people killed, 4.5 million people injured, and 23 million vehicles damaged in motor vehicle crashes in the United States. The economic costs of these crashes totaled $340 billion, including lost productivity, medical, legal and court costs, emergency service, insurance administration, congestion, property damage, and workp ...
  • Use of Hot Water Pressure Wash Surface Preparation and HRCSA Coatings in Bridge Maintenance
    Use of Hot Water Pressure Wash Surface Preparation and HRCSA Coatings in Bridge Maintenance
    Qi, Xiaoning
    2023-02-01 | PDF
    In this Transportation Research Synthesis (TRS), state-of-the-art practice of highway bridge maintenance painting using high-ratio calcium sulfonate alkyd (HRCSA) and hot water pressure wash (HWPW) is reviewed and different state DOTs are surveyed. In summary, low-toxic HRCSA causes less pollution, eliminates waiting time between layers of coatings ...
  • Eastern Massasauga Rattlesnake Ohio Population Survey and Survey Technique Development
    Eastern Massasauga Rattlesnake: Ohio Population Survey and Survey Technique Development
    Hoffman, Andrew ;
    Amber, Evan
    2023-02-01 | PDF
    The Eastern Massasauga Rattlesnake (Sistrurus catenatus; EMR) has declined through most of its range and is endangered in Ohio and federally threatened. Areas that EMR may inhabit must be surveyed prior to approving development projects. Therefore, comprehensive, fast, and affordable survey techniques for the EMR are of interest to government and n ...
  • Criteria and Guidelines for ThreeLane Road Design and Operation
    Criteria and Guidelines for Three-Lane Road Design and Operation
    Davis, Gary A. ;
    Hourdos, John
    2023-02-01 | PDF
    A 4-3 conversion involves changing a four-lane undivided road into one with two general travel lanes separated by a two-way left turn lane. A commonly-used guideline states that a 4-3 conversion can be considering as long as the road’s average annual daily traffic (AADT) volume does not exceed 15,000 vehicles/day but opinions vary, from lowering th ...
  • Implementation of the AASHTO MechanisticEmpirical Design Guide AASHTOWare Pavement ME Design for Pavement Rehabilitation
    Implementation of the AASHTO Mechanistic-Empirical Design Guide (AASHTOWare Pavement ME Design) for Pavement Rehabilitation
    Islam, Shuvo ;
    Hossain, Mustaque
    2023-02-01 | PDF
    The AASHTOWare Pavement ME Design (PMED) is a novel design method for new and rehabilitated pavement designs based on mechanistic-empirical design principles. The design process includes several empirical models calibrated with pavement performance data from pavement sections throughout the United States. Improved accuracy of the design process req ...
  • Riprap Filters and Stability of RiprapCovered Slopes Technical Report
    Riprap Filters and Stability of Riprap-Covered Slopes: Technical Report
    Sfeir, Jerome ;
    Briaud, Jean-Louis
    2023-02-01 | PDF
    This research report documents the outcome of a study performed on riprap filters (granular and geosynthetic) and the stability of riprap-covered slopes. Erosion of the underlying soil through the riprap is likely to happen if there is a sufficient gap in grain size between the soil and the riprap. This gap is often the case, which is why a filter ...
  • Investigating Project Bundling Practices for Transportation Construction Projects
    Investigating Project Bundling Practices for Transportation Construction Projects
    Shan, Yongwei ;
    Shrestha, Saurav
    2023-02-01 | PDF
    Project Bundling is an innovative contract procurement strategy that is being widely used in bridge and highway projects to save project delivery time and costs. The guidebook developed by FHWA on project bundling also provides a wealth of information on project bundling. However, the guidebook is primarily focused on the project bundling practices ...
  • Domestic Airline Fares Consumer Report Third Quarter 2022 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: Third Quarter 2022 Passenger and Fare Information
    United States. Department of Transportation
    2023-02-01 | 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 ...
  • Speed Safety Cameras SSC Transportation Research Synthesis
    Speed Safety Cameras (SSC) Transportation Research Synthesis
    Moore-Ritchie, Chelsea ;
    Kienitz, Heather
    2023-02-01 | PDF
    Since the mid-1990s, the use of Speed Safety Cameras (SSCs), also referred to as Automated Speed Enforcement (ASE), as a speed reduction countermeasure has been growing across the US. Minnesota does not currently permit SSCs by law, but recent interest from community leaders has led to the reconsideration of the use of SSCs on Minnesota roadways. T ...
  • Rural Community Transit Strategies Building on Expanding and Enhancing Existing Assets and Programs
    Rural Community Transit Strategies: Building on, Expanding, and Enhancing Existing Assets and Programs
    Fisher, Thomas ;
    Vogel, M.
    2023-02-01 | PDF
    This project involved the development of innovative sharing-economy strategies to address rural transit challenges in Greater Minnesota. Many transit services and transportation network companies (TNC’s) like Uber and Lyft do not provide services to commuters outside metro areas, forcing most residents in Greater Minnesota to own automobiles. Meanw ...
  • Update of Commercial Vessel Past Point Data for Designing Bridges Across Navigable Florida Waterway
    Update of Commercial Vessel Past Point Data for Designing Bridges Across Navigable Florida Waterway
    Consolazio, Gary R. ;
    Davidson, Michael T.
    2023-02-01 | PDF
    When designing a bridge that spans over a navigable waterway, the risk associated with potential vessel collisions must be evaluated to ensure that the structure possesses sufficient impact resistance. Typically, the probability-based risk assessment procedure specified by AASHTO is employed for this purpose. The procedure requires collection of da ...
  • Geoarchaeological Survey Methods for Enhanced DecisionMaking in the Ohio Department of Transportations Project Development Process Fact Sheet
    Geoarchaeological Survey Methods for Enhanced Decision-Making in the Ohio Department of Transportation’s Project Development Process [Fact Sheet]
    Dam, Seth Van ;
    Laswell, Jeff
    2023-02-01 | PDF
    The objective of this geophysical technical research was to aid the Ohio Department of Transportation’s (ODOT) Office of Environmental Services (OES) to provide a baseline understanding of geophysical techniques and their applications to various types of archaeological investigative situations, and to provide recommendations for the implementation ...
  • Development of Environmental Product Declarations EPDs for Sustainable Pavement Procurement
    Development of Environmental Product Declarations (EPDs) for Sustainable Pavement Procurement
    Senseney, Christopher T
    2023-02-01 | PDF
    The Colorado Department of Transportation (CDOT) funded this project to assess the current state-of-the-practice of EPDs in pavement material manufacturing; to educate stakeholders regarding pavement life cycle assessment (LCA) and EPDs; and to help develop protocols CDOT and pavement material producers can use to integrate EPDs that are uniquely s ...
  • 2023 Progress Report on the National Roadway Safety Strategy
    2023 Progress Report on the National Roadway Safety Strategy
    United States. Department of Transportation. Office of the Secretary of Transportation
    2023-02-01 | PDF
    This report provided an update on the roadway safety problem, an overview of the Departmental actions underway to address the ongoing crisis on our roadways, a description of new priority actions that will build on the NRSS, and an explanation of how USDOT is working with stakeholders to further advance safety to save lives and prevent harm to all ...
  • Fiber Reinforced Concrete for Bridge Deck Overlays
    Fiber Reinforced Concrete for Bridge Deck Overlays
    Amini, Kamran ;
    Vaddey, Pavan
    2023-02-01 | PDF
    This report reviews available research literature and reports on Fiber Reinforced Concrete (FRC) mixtures to recognize best practices of using FRC overlay mixtures and identify products with the potential of being successfully utilized in Missouri. State DOT representatives were surveyed to consolidate the current state of practice as it relates to ...
  • Field Evaluation of Geophysical Applications for DOTD Project Capsule
    Field Evaluation of Geophysical Applications for DOTD [Project Capsule]
    Ferguson, Nicholas
    2023-02-01 | PDF
    This research will evaluate the effectiveness of the Electrical Resistivity, Seismic Refraction, and Cross-hole Tomography geophysical methods in Louisiana soils and provide detailed descriptions of each method, including their applicability to geotechnical engineering, pros and cons, and cost of each method and required equipment. This research wi ...
  • School Zone Speed Limits SZLSs Transportation Research Synthesis
    School Zone Speed Limits (SZLSs) Transportation Research Synthesis
    Moore-Ritchie, Chelsea ;
    Kienitz, Heather
    2023-02-01 | PDF
    Minnesota statute provides for a wide range of school zone speed limits (SZSLs) from which local authorities may select. This Transportation Research Synthesis summarizes the current research regarding setting SZSLs, effective methods and procedures for setting school zone speed limits and known spillover or other unintended consequences for settin ...
  • Best Types of Commodity Flow Data for Freight Railroad and Ports and Waterways Studies
    Best Types of Commodity Flow Data for Freight, Railroad, and Ports and Waterways Studies
    Fonseca, Camila ;
    Zeerak, Raihana
    2023-02-01 | PDF
    The understanding of freight movement is critical to economic development and competitiveness and to make decisions regarding the transportation system. Despite the increased interest in freight planning and modeling, freight data are limited in availability and granularity, and the existing sources are incomplete or outdated. This research analyze ...
  • Automated Extraction of Weather Variables from Imagery
    Automated Extraction of Weather Variables from Imagery
    Wiener, Gerry ;
    Petzke, William
    2023-02-01 | PDF
    Department of transportation (DOT) maintenance supervisors utilize a variety of tools including maintenance decision support systems (MDSS) to gain a better understanding of current and future road surface conditions (RSC) during winter weather. MDSS automatically attempt to deduce current RSC based on road weather information system (RWIS) and oth ...
  • UserCentered Design for Railroad Automation Phase I
    User-Centered Design for Railroad Automation: Phase I
    Cowen, Michael B. ;
    Haaren, Michael H.
    2023-02-01 | PDF
    This document is the final report for Phase I of a two-phase research project, “User-Centered Design for Railroad Automation (UCD-Rail),” to develop and demonstrate an improved interface between human operators and advanced automation in rail systems. Applying user-centered design methodology, Phase I offers a new rail systems user interface concep ...
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