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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 35888 results
  • Curved Integral Abutment Bridge Research Draft Final Report
    Curved Integral Abutment Bridge Research – Draft Final Report
    WSP USA Inc.  ...
    2022-12-28 | PDF
    The purpose of this research initiative is to investigate the effects of the degree of curvature on the behavior of curved integral abutment structures, with consideration for various skews, span lengths and layouts, and pile cantilever lengths. The results of this research will provide recommendations to implement findings through a design guideli ...
  • Competitive Bidding in Construction Contracting
    Competitive Bidding in Construction Contracting
    Liu, Hexu ;
    Kwigizile, Valerian
    2022-12-21 | PDF
    Competitive bidding and accurate cost estimation allow state departments of transportation (DOTs) to make effective use of budgeted funds to deliver construction projects. However, the different bidding procedures and practices in use affect the market competition in competitive bidding. For many state DOTs, including Michigan DOT (MDOT), obtaining ...
  • Public Perceptions of Transportation Fees Taxes and Electric Vehicles in North Carolina
    Public Perceptions of Transportation Fees, Taxes and Electric Vehicles in North Carolina
    Findley, Daniel ;
    Davis, Joy
    2022-12-15 | PDF
    This research effort is part of a collaborative research project between the North Carolina Department of Transportation (NCDOT) and North Carolina State University’s (NCSU’s) Institute for Transportation Research and Education. As North Carolina confronts increasing transportation budget deficits, reliable revenue generating mechanisms will become ...
  • GISBased Environmental LongTerm Monitoring Web Portal Phase III
    GIS-Based Environmental Long-Term Monitoring Web Portal Phase III
    Terry, Leigh
    2022-12-01 | PDF
    A GIS-based online portal was developed to store, analyze, and display data from multiple sources pertinent to the ALDOT Coliseum Boulevard groundwater contaminant plume site in Montgomery Alabama. These sources comprise various consultants involved with the site including geotechnical companies, water testing labs, law firms, and management person ...
  • PerformanceBased Asphalt Mixture Design PBD for Arkansas
    Performance-Based Asphalt Mixture Design (PBD) for Arkansas
    Hall, Kevin D. ;
    Castillo-Camarena, Elvis
    2022-12-01 | PDF
    This project sought to develop/adapt and implement a 'cracking test' for asphalt mixture design, to use in conjunction with the current Asphalt Pavement Analyzer rutting test to shift mixture design in Arkansas to a performance, rather than volumetric, basis. In addition, the project attempted to re-evaluate the effectiveness of the current method ...
  • ODOT Radar System for RealTime Traffic Flow Monitoring
    ODOT Radar System for Real-Time Traffic Flow Monitoring
    Refai, Hazem H. ;
    Habib, Mohamed Ali
    2022-12-01 | PDF
    This report presents research results and experiments that were designed to compare four traffic systems: Radar, AVC, HERE, and INRIX in terms of speed, volume, and travel time. The first three chapters introduce the systems, related studies, data collection procedures, and preprocessing techniques. The second three chapters detail the comparison r ...
  • Expanded Use of AVLGPS Technology Final Report
    Expanded Use of AVL/GPS Technology: Final Report
    Lee, Ming-Shiun ;
    Nelson, Dan
    2022-12-01 | PDF
    Summer road maintenance is a critical activity for highway maintenance agencies that involves a wide range of maintenance and construction vehicles that can be active at any given time, which makes vehicle and maintenance asset management challenges. Automated Vehicle Location (AVL) and Global Positioning Systems (GPS) technologies installed in win ...
  • Expanded Uses of AVLGPS Systems Maximize Value Research Brief
    Expanded Uses of AVL/GPS Systems Maximize Value [Research Brief]
    Gray, David ;
    Spoor, Steve
    2022-12-01 | PDF
    The goal of this project was to demonstrate applications for using AVL/GPS technologies to support winter and all-season maintenance activities. Clear Roads agencies also needed information about the transferability of the technologies to transition the systems between winter and other seasonal maintenance activities. A review of the literature pro ...
  • Enhancing Pedestrian Experiences at Roundabouts Technical Summary
    Enhancing Pedestrian Experiences at Roundabouts [Technical Summary]
    Gustafson, Joe ;
    Godavarthy, Ranjit
    2022-12-01 | PDF
    The goal of this project was to understand pedestrian issues with roundabouts, identify strategies to enhance the pedestrian experience and develop guidance for local agencies creating new roundabouts and evaluating existing ones. Researchers reviewed past studies and strategies to control pedestrian crossings in roundabouts and the most cost-effec ...
  • Quantifying the Impact of Wide Base Tires on Pavement Performance in Michigan
    Quantifying the Impact of Wide Base Tires on Pavement Performance in Michigan
    You, Zhanping ;
    Yin, Lei
    2022-12-01 | PDF
    Since dual tires (DT) have been the trucking industry standard for many decades, existing modeling of the stresses imparted to the pavement through the tires is based on DTs. However, the freight industry has started to use wide base single tires (WBT) due to their economic benefits. This study aimed to investigate the use of WBTs in Michigan (MI) ...
  • Flooding Monitoring and Prediction System Development
    Flooding Monitoring and Prediction System Development
    Refai, Hazem H. ;
    Mousselli, Abdullah
    2022-12-01 | PDF
    The first half of this report details the design of a flooding emulation system to evaluate LiDAR-, radar-, and ultrasonic-based devices for monitoring water level rise and measure water flow speed. The second half of the report describes the incorporation of NOAA data with data collected at ODOT weather station to predict the potential of flooding ...
  • Commodity Flow Data for Freight Network Infrastructure Planning Technical Summary
    Commodity Flow Data for Freight Network Infrastructure Planning [Technical Summary]
    Andrusko, Andrew ;
    Fonseca-Sarmiento, Camila
    2022-12-01 | PDF
    The goal of this project was to understand existing data sources to determine which are the most helpful for MnDOT’s planning, programming and design of freight network infrastructure.
  • Evaluation of the Local Bridge Improvement Assistance Program
    Evaluation of the Local Bridge Improvement Assistance Program
    Tabatabai, Habib ;
    Qin, Xiao
    2022-12-01 | PDF
    In 2019, a pilot program was initiated by the Wisconsin Department of Transportation (WisDOT) in consultation with the Wisconsin County Highway Association (WCHA) to streamline the delivery and oversight of Low-Risk local bridge projects. The goal of this research project was to evaluate the Low-Risk bridge pilot program and make recommendations be ...
  • CDOT Dynamic Traffic Assignment DTA Implementation Plan
    CDOT Dynamic Traffic Assignment (DTA) Implementation Plan
    Slavin, Howard ;
    Morgan, Daniel
    2022-12-01 | PDF
    This report presents a vision and an implementation plan for region-wide dynamic traffic assignment (DTA) in Colorado. With the proper approach and methods, DTA can be a powerful and cost-effective decision support tool for CDOT’s and MPOs’ transportation planning and engineering responsibilities and activities. In the report, simulation-based DTA ...
  • Research Development and Technology Strategic Plan 20222026
    Research, Development and Technology Strategic Plan 2022–2026
    United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
    2022-12-01 | PDF
    This U.S. DOT Research, Development, and Technology Strategic Plan for FY2022 – 2026 establishes the Department’s leadership role in supporting, fostering, and safeguarding transportation innovation so that it meets our goals and reflects our values. The RD&T Strategic Plan describes the Department’s research priorities, objectives, and strategies ...
  • Success of a 4Year Pavement Management Plan
    Success of a 4-Year Pavement Management Plan
    Gurganus, Charles ;
    Goehl, Darlene
    2022-12-01 | PDF
    Successful 4-year pavement management plans help provide the traveling public with a safe, comfortable, and reliable roadway network. Each maintenance section plays a role in executing an effective 4-year pavement management plan. To continue to improve the statewide system and get the most value out of fiscally constrained budgets, pavement manage ...
  • Pavement Repairs in Preparation for a Preventative Maintenance Contract
    Pavement Repairs in Preparation for a Preventative Maintenance Contract
    Goehl, Darlene ;
    Estakhri, Cindy
    2022-12-01 | PDF
    The synthesis study focused on pavement preparatory work performed before preventive maintenance (PM) surfacing contracts with the goal of answering, “What work needs to be performed to the roadway before a new surface is placed?” Preparatory work performed by in-house maintenance forces or maintenance contracts may include crack sealing, fog seal, ...
  • Develop and Evaluate Performance Measures for Intelligent Transportation Systems ITS in Louisiana
    Develop and Evaluate Performance Measures for Intelligent Transportation Systems (ITS) in Louisiana
    Thapa, Raju ;
    Codjoe, Julius
    2022-12-01 | PDF
    The Louisiana Department of Transportation and Development (DOTD) established Intelligent Transportation System (ITS) programs over 20 years ago. Before DOTD expands or implements new ITS programs, a study needed to be undertaken to evaluate the performance of the current ITS programs to demonstrate their benefits. The primary objective of this res ...
  • Evaluating PermittedProtected Versus Protected LeftTurn Signals in Louisiana
    Evaluating Permitted/Protected Versus Protected Left-Turn Signals in Louisiana
    Thapa, Raju ;
    Asaduzzaman, Md
    2022-12-01 | PDF
    The main objective of this study is to evaluate the safety and operation of existing left-turn signal phases at intersections and investigate relevant data to develop proper guidance on when it is appropriate to install each signal type. The study considered protected-only (PO), protected permitted left-turn (PPLT), and flashing yellow arrow (FYA) ...
  • Development of Tub Girders for Prestressed Concrete Bridges Complying With LRFD
    Development of Tub Girders for Prestressed Concrete Bridges Complying With LRFD
    Kim, Yail Jimmy
    2022-12-01 | PDF
    This report presents the development of tub girders for prestressed concrete bridges complying with the Load and Resistance Factor Design (LRFD) method. In addition, the use of 0.7 in. strands is elaborated for the B618-U girders of the Colorado Department of Transportation. In the first part of the report as regards a state-of-the-art review, tech ...
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