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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 4861 - 4880 of 36020 results
  • The Applications of Data Science and Big Data Analytics in Underground Transportation Infrastructure
    The Applications of Data Science and Big Data Analytics in Underground Transportation Infrastructure
    Pourhomayoun, Mohammad ;
    Nagrecha, Kabir
    2020-03-01 | PDF
    This research project focuses on the applications of data science, machine learning, and big data analytics in the construction, maintenance and performance of the underground transportation infrastructure. The first objective is to develop advanced data mining and novel machine learning based methods for predicting or detecting ground conditions u ...
  • Developing a Connected Vehicle Transit Signal Priority System Final Report Part 1
    Developing a Connected Vehicle Transit Signal Priority System [Final Report - Part 1]
    Abdelghaffar, Hossam ;
    Ahn, Kyoungho
    2020-03-01 | PDF
    This study developed an advanced decentralized transit signal priority (TSP) system using a cycle-free Nash bargaining (NB) signal control system. TSP is recognized as an innovative technology solution capable of enhancing traditional transit services. TPS allows transit vehicles to utilize additional or alternative green time to clear the intersec ...
  • Crime and Harassment on Public Transportation A Survey of SJSU Students Set in International Context
    Crime and Harassment on Public Transportation: A Survey of SJSU Students Set in International Context
    Agrawal, Asha Weinstein ;
    Loukaitou-Sideris, Anastasia
    2020-03-01 | PDF
    Communities around the world are gradually becoming aware that transit riders, and especially women, are often victims of a wide range of offenses of a sexual nature that happen on buses and trains, and at bus stops and train stations. Better understanding the extent and nature of sexual harassment on transit is a critical issue for transit operato ...
  • Adaptive Signal Control Algorithms for Connected Vehicles
    Adaptive Signal Control Algorithms for Connected Vehicles
    Comert, Gurcan ;
    Chowdhury, Mashrur
    2020-03-01 | PDF
    Traffic congestion at a signalized intersection greatly reduces the travel time reliability in urban areas. Adaptive signal control system (ASCS) is an advanced traffic signal control technology that regulates the signal phasing and timings considering the traffic patterns in real-time in order to reduce traffic congestion. Real-time prediction of ...
  • Speed Management in Small Cities and TownsGuidelines for Indiana
    Speed Management in Small Cities and Towns—Guidelines for Indiana
    Tarko, Andrew P. ;
    Hall, Thomas
    2020-03-01 | PDF
    Many small cities and towns in rural states such as Indiana are crossed by arterial highways. The local traffic on these roads, particularly vulnerable road users, face the excessive risk of injury and death. This danger is amplified with local land development, driveways, and on-street parking in town centers. This report presents an Indiana study ...
  • Mitigating Storm Drainage System Impacts from Litter and Debris
    Mitigating Storm Drainage System Impacts from Litter and Debris
    Elzarka, Hazem ;
    Buchberger, Steven
    2020-03-01 | PDF
    The objective of this research is to analyze current best practices for collecting/removing litter and debris from the highways; and provide recommendations on efficient, more productive and cost-effective ways to keep litter/debris from clogging the urban highway drainage system. Currently, Ohio Department of Transportation (ODOT) collects litter ...
  • Bidding of Accelerated Bridge Construction Projects Case Studies and Consensus Building
    Bidding of Accelerated Bridge Construction Projects: Case Studies and Consensus Building
    Freeseman, Katelyn ;
    Shane, Jennifer S.
    2020-03-01 | PDF
    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 ...
  • Georgias LongTerm Pavement Performance Monitoring and Management Plan Detail Design of Plan
    Georgia’s Long-Term Pavement Performance Monitoring and Management Plan – Detail Design of Plan
    Wu, Yiching ;
    Salameh, Ryan
    2020-03-01 | PDF
    GDOT is actively seeking opportunities to improve its data collection and utilization to better support data-driven decision-making. This research project is to develop a long-term pavement performance monitoring and management plan that can cost-effectively provide sufficient, quality data to support pavement design and pavement management, includ ...
  • Design and Performance Evaluation of a Semiflexible Snow Barrier for Avalanche Protection
    Design and Performance Evaluation of a Semiflexible Snow Barrier for Avalanche Protection
    Hewes, Joshua T.
    ORCID ICON IMG
    2020-03-01 | PDF
    A new type of avalanche risk reducing snow supporting structure called a “snow supporting umbrella” or “SSU” was investigated for its potential effectiveness in preventing natural release of snow avalanches. Because no existing design specifications or other publications address how the geometry, member arrangement, and connection details of a SSU ...
  • MASH TL3 Evaluation of 2019 MASH 2Tube Bridge Rail Thrie Beam Transition
    MASH TL-3 Evaluation of 2019 MASH 2-Tube Bridge Rail Thrie Beam Transition
    Williams, William F. ;
    Menges, Wanda L.
    2020-03-01 | PDF
    The purpose of the tests reported herein was to assess the performance of the 2019 MASH 2-Tube Bridge Rail Thrie Beam Transition according to the safety-performance evaluation guidelines included in American Association of State Highway and Transportation Officials (AASHTO) Manual for Assessing Safety Hardware (MASH). The crash tests were performed ...
  • Integration of a Robust Automated Pedestrian Detection System for Signalized Intersections Summary
    Integration of a Robust Automated Pedestrian Detection System for Signalized Intersections [Summary]
    Lin, Pei-Sung
    2020-03-01 | PDF
    University of South Florida researchers studied the use of automatic pedestrian detection systems for activation of pedestrian safety devices at midblock crossings and signalized intersections
  • RailswithTrails Lessons Learned
    Rails-with-Trails: Lessons Learned
    Fijalkowski, Jared ;
    Filosa, Gina
    2020-03-01 | PDF
    In 2002, the U.S. Department of Transportation (DOT) published its first Rails-with-Trails: Lessons Learned report, which summarized the state of the practice and lessons learned regarding the development, construction, and operations of rails-with-trails. This updated Rails-with-Trails: Lessons Learned report documents how the state of the practic ...
  • Evaluation of Techniques to Remove Defective Grout from PostTensioning Tendons Summary
    Evaluation of Techniques to Remove Defective Grout from Post-Tensioning Tendons [Summary]
    Potter, William ;
    Hamilton, H. R. (Trey)
    2020-03-01 | PDF
    University of Florida researchers tested two methods of remediating soft grout: use of high pressure water to remove defective grout and a method of drying defective grout. Corrosion potential during the tendon-drying process was also evaluated.
  • Magnetic Flux Leakage Device for Evaluation of Prestressed Concrete Box Bridges
    Magnetic Flux Leakage Device for Evaluation of Prestressed Concrete Box Bridges
    Chase, Steven B. ;
    Balakumaran, Soundar S G
    2020-03-01 | PDF
    Corrosion of prestressed concrete reinforcement in bridge components is a major concern for state transportation agencies. The severity of the problem is amplified by the fact that the corrosion-induced damage in concrete reinforcement often does not show up on the surface until significant propagation has occurred. Moreover, prestressed reinforcem ...
  • Evaluation of Penetrating Sealers Applied to Saw Cut Faces in Concrete Pavement Joints
    Evaluation of Penetrating Sealers Applied to Saw Cut Faces in Concrete Pavement Joints
    Xiao, Danny X. ;
    Kevern, John T.
    2020-03-01 | PDF
    The objectives of this study were to assess the use of penetrating sealers to protect concrete pavement joints and to evaluate its cost-effectiveness. Evaluations were first conducted on in-service pavements on I-94, I-41, and I-39 where penetrating sealer was applied. Controlled laboratory tests were completed to investigate the impact of sealer t ...
  • Welding of ASTM A709 50CR Using Austenitic Filler Wires With Varying Heat Inputs and Maximum Interpass Temperatures
    Welding of ASTM A709 50CR Using Austenitic Filler Wires With Varying Heat Inputs and Maximum Interpass Temperatures
    Fitz-Gerald, James M ;
    Agnew, Sean R
    2020-03-01 | PDF
    ASTM A709 Grade 50CR, also known as ASTM A1010, is a structural steel developed to address the corrosion issues associated with the use of traditional weathering steels, especially in environments involving combined prolonged wetness and chlorine salts. The fabrication of bridge girders from Grade 50CR has largely relied on the use of 309L solid fi ...
  • Utilizing Pavement Friction and Texture Data for The Reduction of Traffic Crashes and Delays
    Utilizing Pavement Friction and Texture Data for The Reduction of Traffic Crashes and Delays
    Li, Joshua Q. ;
    Wang, Kelvin
    2020-03-01 | PDF
    This project presented an integral process to include skid performance of different preventive treatments and their safety benefits into the life cycle cost analysis (LCCA) of pavements. Extensive data sets from several ODOT database systems were processed and analyzed. An enhanced safety performance function (SPF) was developed and the friction de ...
  • Developing Floridaspecific Mobility Enhancement Factors MEFs and Crash Modification Factors CMFs for TSMO Strategies
    Developing Florida-specific Mobility Enhancement Factors (MEFs) and Crash Modification Factors (CMFs) for TSM&O Strategies
    Alluri, Priyanka ;
    Sando, Thobias
    2020-03-01 | PDF
    Transportation Systems Management and Operations (TSM&O) focus on improving the safety and operational performance of the transportation network by integrating proven transportation management strategies and Intelligent Transportation Systems (ITS) applications. The Florida Department of Transportation (FDOT) has been a pioneer in adopting TSM&O st ...
  • Analysis of Surface Transportation Board Waybill Data for Freight Planning and Operations
    Analysis of Surface Transportation Board Waybill Data for Freight Planning and Operations
    Srivastava, Anupam ;
    Perry, Ernest
    2020-03-01 | PDF
    There is an extensive range of available data for multimodal freight planning and operations decision-making. Even so, the freight data available is often inadequate for timely and precise analysis on modal freight movements due to numerous shortcomings in data sources, including sample size concerns, aggregation of information, precision and accur ...
  • Investigation of Strategic Deployment Opportunities for Unmanned Aerial Systems UAS at INDOT
    Investigation of Strategic Deployment Opportunities for Unmanned Aerial Systems (UAS) at INDOT
    Hubbard, Sarah M ;
    Hubbard, Bryan
    2020-03-01 | PDF
    Unmanned aerial systems (UAS) are increasingly used for a variety of applications related to INDOT’s mission including bridge inspection, traffic management, incident response, construction and roadway mapping. UAS have the potential to reduce costs and increase capabilities. Other state DOTs and transportation agencies have deployed UAS for an inc ...
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