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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 3441 - 3460 of 35958 results
  • Evaluation of Roadway Concrete Barriers and Materials
    Evaluation of Roadway Concrete Barriers and Materials
    Shahriari, Vista ;
    Prabhakar, Pavana
    2021-07-01 | PDF
    The research objective was to investigate the causes and sources of distress observed in single-slope slip-formed roadway concrete barriers with the goal of developing strategies to ensure the long-term performance of these barriers in Wisconsin. To that end, barriers built between 2012 and 2015 and located in three different regions of WI were stu ...
  • Using Data Analytics in Forecasting Bridge Condition
    Using Data Analytics in Forecasting Bridge Condition
    Bell, Erin ;
    Kwiatkowski, Kyle
    2021-07-01 | PDF
    Reliable data-driven forecasting models allow for public agencies to plan for future needs and resource allocation. Conditions of bridge assets are managed through maintenance, preservation, rehabilitation and reconstruction. The New Hampshire Department of Transportation documents the appropriate timing of these treatments in Recommended Investmen ...
  • Performance of Interstate Rubblization in Illinois
    Performance of Interstate Rubblization in Illinois
    Lippert, David L. ;
    Thompson, Marshall R.
    2021-07-01 | PDF
    In Illinois, hot-mix asphalt overlaid concrete pavements typically exhibit reflective cracking of joints and cracks from the pavement below, resulting in shortened life and maintenance issues. Over the years, various patching, fabric, and crack and seat techniques were attempted with few positive results. This led to more aggressive techniques to e ...
  • Identifying and Prioritizing Target Regions to Conduct Outreach Activities to Improve Safety and Mobility of Aging Population
    Identifying and Prioritizing Target Regions to Conduct Outreach Activities to Improve Safety and Mobility of Aging Population
    Alluri, Priyanka ;
    Kodi, John
    2021-07-01 | PDF
    Florida leads the nation with over 20% of the population age 65 years and older, and this percentage is expected to continue to grow. As part of the strategies to improve the safety and mobility of the aging population, this research project developed a Geographic Information System (GIS)-based approach to identify and prioritize target regions to ...
  • Bump at the End of the Bridge Enhanced Remediation Decision Making via 3D Measurement and Advanced 3D Dynamic Analysis
    Bump at the End of the Bridge: Enhanced Remediation Decision Making via 3D Measurement and Advanced 3D Dynamic Analysis
    Camp, Charles V ;
    Pezeshk, Shahram
    2021-07-01 | PDF
    The Tennessee Department of Transportation (TDOT) and transportation departments across the country have long recognized that approach slabs and pavements at bridges are prone to both settlement and cracking, which have been widely recognized as the "bump at the end of the bridge" (BEB). This study seeks to provide guidance and aid TDOT officials i ...
  • Pollinator Habitat Along Highway Right of Way
    Pollinator Habitat Along Highway Right of Way
    Trauth, Kathleen M. ;
    Aloysius, Noel R
    2021-07-01 | PDF
    Pollinators are important components of our ecosystems, as well as being important contributors to agricultural production. Highway right of way (ROW) is one potential habitat for pollinators. The objectives of this study were to assess existing practices of other agencies for promoting pollinator habitat within the ROW and to identify potential lo ...
  • Harnessing Solar Energy Through Noise Barriers and Structural Snow Fencing
    Harnessing Solar Energy Through Noise Barriers and Structural Snow Fencing
    Yang, Mijia ;
    Yu, Yao
    2021-07-01 | PDF
    This research studied the possibility of harnessing solar energy through right-of-way associated structures, such as noise barriers and snow fences. A detailed survey was conducted of the general public, farmers, and utility companies to determine their acceptance of such an initiative. A large percentage of the general public, farmers, and utility ...
  • Design and Performance of OpenGraded Friction Course OGFC Mixtures Containing Epoxy Asphalt
    Design and Performance of Open-Graded Friction Course (OGFC) Mixtures Containing Epoxy Asphalt
    Yin, Fan ;
    Anand, Anurag
    2021-07-01 | PDF
    The objective of this study was to determine the viability of using epoxy-modified asphalt (EMA) to improve the long-term durability and life span of open-graded friction course (OGFC) mixtures in Florida. To that end, a comprehensive literature review and laboratory experimental plan were conducted. The laboratory test procedure combining the stor ...
  • Evaluation of Liquid Deicing Materials for Winter Maintenance Applications
    Evaluation of Liquid Deicing Materials for Winter Maintenance Applications
    Lammers, Erin
    2021-07-01 | PDF
    Winter weather can often pose difficulties for transportation agencies as they work to clear roads of snow and ice quickly so that motorists can travel safely and efficiently. Kentucky has made efforts to maximize efficiency within its winter maintenance program by focusing on optimized equipment usage and personnel time management. In this study, ...
  • Flexible Pavement Design FullDepth Asphalt and Rubblization A Summary of Activities
    Flexible Pavement Design (Full-Depth Asphalt and Rubblization): A Summary of Activities
    Thompson, Marshall R. ;
    Lippert, David L.
    2021-07-01 | PDF
    This report summarizes activities undertaken to support and ensure that the Illinois Department of Transportation utilizes the best demonstrated available technology for design and construction of full-depth hot-mix asphalt (HMA) pavements and HMA pavements on rubblized Portland cement concrete pavement (PCCP). To achieve this goal, the researchers ...
  • Balanced Asphalt Concrete Mix Performance in Utah Phase V Field Evaluation for Intermediate and LowTemperature Cracking
    Balanced Asphalt Concrete Mix Performance in Utah. Phase V: Field Evaluation for Intermediate and Low-Temperature Cracking
    Romero, Pedro
    2021-07-01 | PDF
    A follow-up study was conducted in which the performance of five asphalt pavements was documented after three years of field service in Utah. Cores were taken at each pavement section and brought to the lab where they were cut and tested using the BBR, the IFIT, and the IDEAL CT. The respective performance indices from these tests were compared to ...
  • Development of a Traffic Management Decision Support Tool DST for Freeway Incident Traffic Management FITM Plan Deployment Phase2 An Enhanced DST2 including I95 I495 I695 I70 US 29
    Development of a Traffic Management Decision Support Tool (DST) for Freeway Incident Traffic Management (FITM) Plan Deployment: Phase-2: An Enhanced DST-2, including I-95, I-495, I-695, I-70, US 29
    Chang, Gang-Len ;
    Huang, Yen-Lin
    2021-07-01 | PDF
    Ground in the development experience of the piloting the Incident Duration Prediction Module (IDPM) for I-95 and its application results, this study further developed IDPMs for I-495, I-695, I-70, and US 29, each with distinguishing traffic patterns and roadway features. Considering the uniquely critical role assumed by I-495 and I-695, respectivel ...
  • Synthesis of Research Results and Technology Trends to Inform Federal State Regional and Local Policies for Smart Mobility of People and Goods Phase 3
    Synthesis of Research Results and Technology Trends to Inform Federal, State, Regional and Local Policies for Smart Mobility of People and Goods: Phase 3
    Caldwell, Stan ;
    Hendrickson, Chris
    2021-06-30 | PDF
    Carnegie Mellon University (CMU) and its University Transportation Center partner institutions (Community College of Allegheny County, the Ohio State University, and the University of Pennsylvania) have a variety of research projects underway or completed on a diverse set of topics. Individual researchers publish research results and transfer techn ...
  • Mobility Accessibility and Disadvantaged Neighborhoods Assessing Diversity in TransportationRelated Needs and Opportunities
    Mobility, Accessibility and Disadvantaged Neighborhoods: Assessing Diversity in Transportation-Related Needs and Opportunities
    Ong, Paul M. ;
    Pech, Chhandara
    2021-06-30 | PDF
    This project examines commonalities and differences among disadvantaged neighborhoods in mobility and access to opportunities. Our approach is based on the concept of spatial-transportation mismatch (STM), which asserts that spatial distance and poor transportation are potential barriers to opportunities beyond one’s immediate location. The project ...
  • Innovations in Transit An InDepth Case Study of the City of MonroviaLyft PublicPrivate Partnership to Increase Transit Ridership in Suburbia
    Innovations in Transit? An In-Depth Case Study of the City of Monrovia/Lyft Public-Private Partnership to Increase Transit Ridership in Suburbia
    Banerjee, Tridib ;
    Bahl, Deepak
    2021-06-30 | PDF
    This report presents several analyses that examine the implementation of the GoMonrovia program, a public-private partnership between the City of Monrovia and Lyft. These analyses and the questions that motivate them fall across two dimensions. First, what is the socioeconomic and demographic profile of first/last mile users, and to what extent doe ...
  • Estimating the Impacts of Automatic Emergency Braking AEB Technology on Traffic Energy and Emissions
    Estimating the Impacts of Automatic Emergency Braking (AEB) Technology on Traffic Energy and Emissions
    Wu, Guoyuan ;
    Liao, Xishun
    2021-06-30 | PDF
    As one of the key advances in vehicle safety, Automatic Emergency Braking (AEB) has been introduced in the U.S. and the number of vehicles equipped with this technology has increased significantly in recent years. Most of existing studies have evaluated this technology at the individual vehicle level or focused on its safety performance. In this st ...
  • Using Transit Vehicles as Probes to Monitor Community Air Quality and Exposure
    Using Transit Vehicles as Probes to Monitor Community Air Quality and Exposure
    Chavez, Mayra C ;
    Williams, Evan
    2021-06-30 | PDF
    This project evaluates the feasibility of using transit vehicles traveling on fixed routes in a well-controlled residential community in El Paso for near-road exposure assessment. Continuous on-road measurements of four pollutants (PM₂.₅, P.M₁₀, NO₂, and O₃) were recorded using U.S. Environmental Protection Agency (EPA) FEM-designated monitors in c ...
  • Updated and Regional Calibration Factors for Highway Safety Manual Crash Prediction Models 20162019
    Updated and Regional Calibration Factors for Highway Safety Manual Crash Prediction Models (2016-2019)
    Saleem, Taha ;
    Srinivasan, Raghavan
    2021-06-30 | PDF
    The overall objective of this effort was to estimate the calibration factors for all the prediction models in Part C of the 1st edition of the Highway Safety Manual (HSM) that are of interest to North Carolina Department of Transportation (NCDOT) as well as calibration factors for freeway models that are slated to be part of the next HSM based on t ...
  • Immersive Highly Realistic inLab Experiments of Cycling Route Choices
    Immersive, Highly Realistic in-Lab Experiments of Cycling Route Choices
    Daziano, Ricardo A ;
    Yoon, So-Yeon
    2021-06-29 | PDF
    This project aims to understand how self-assessed health status relates to preferences for cycling infrastructure. An integrated latent class and latent variable choice model is fitted using responses to a stated preference experiment from a panel of New York City residents (N = 801). Estimates show that people with stated good physical health tend ...
  • Investigating the Service of AppBased Rideshare and Transportation Network Companies in Tennessee
    Investigating the Service of App-Based Rideshare and Transportation Network Companies in Tennessee
    Crossland, Cassidy ;
    Brakewood, Candace
    2021-06-25 | PDF
    With companies like Uber and Lyft leading the way, ridesourcing (also known as ridesharing, ridehailing or Transportation Network Companies) has grown and continues to grow in popularity in the United States since its introduction just over ten years ago. This research aims to understand the socioeconomic characteristics and travel behavior trends ...
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