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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 3541 - 3560 of 36151 results
  • 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 ...
  • 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, ...
  • 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 ...
  • Improvement of ParkandRide Facilities and Services in Metropolitan Areas of Tennessee
    Improvement of Park-and-Ride Facilities and Services in Metropolitan Areas of Tennessee
    Khojandi, Anahita ;
    Brakewood, Candace
    2021-06-25 | PDF
    Strategic placement of park-and-ride (P&R) facilities is extremely important to ensure the facilities are effectively utilized by commuters, avoiding oversubscription or underutilization after placement. This report develops a framework that integrates a demand model and an optimization model to study the optimal placement of P&R facilities to maxi ...
  • Cross Asset Management Tools
    Cross Asset Management Tools
    Drzymalski, Julie
    2021-06-25 | PDF
    PennDOT seeks to find a methodology to prioritize work of their two largest asset classes, bridges and pavements using the Lowest Life Cycle Cost methodology (LLCC) to make more effective and efficient use of resources. Optimization of the projects is unrealistic given the volume of necessary work and complexity of the LLCC methodology. This resear ...
  • Fighting for Curb Space: Parking, Ride-Hailing, Urban Freight Deliveries, and Other Users [supporting dataset]
    Jaller, Miguel ;
    Rodie, Caroline
    2021-06-24 | ZIP
    This study conducted a comprehensive literature review on several topics related to curb space management, discussing various users (e.g., pedestrians, bicycles, transit, taxis, and commercial freight vehicles), summarizing different experiences, and focusing the discussion on Complete Street strategies. Moreover, the authors reviewed the academic ...
    Dataset
  • Changing Access to Public Transportation and the Potential for Increased Travel
    Changing Access to Public Transportation and the Potential for Increased Travel
    Watkins, Kari E. ;
    McDonald, Noreen
    2021-06-22 | PDF
    With nationwide declines in public transportation ridership, transit may be falling behind in its ability to help cities deal with congestion. Increasing real-estate values are causing the economic displacement of low-income populations, those most closely associated with transit ridership. A plethora of new mobility options are providing alternati ...
  • Mechanically Stabilized Earth MSE Wall Backfill Water Infiltration
    Mechanically Stabilized Earth (MSE) Wall Backfill Water Infiltration
    Soleimanbeigi, Ali ;
    Bohrer, Keli
    2021-06-21 | PDF
    The stability of Mechanically Stabilized Earth (MSE) walls may be compromised in undrained conditions such as during heavy rain, flooding, or rapid drawdown. For MSE walls potentially subject to inundation, such as those located adjacent to rivers, canals, detention basins or retention basins, understanding pore pressure evolution during infiltrati ...
  • Project TraumaHawk Improving Patient Outcomes Through Photographic Trauma Site Documentation Phase IV Regional Expansion
    Project TraumaHawk: Improving Patient Outcomes Through Photographic Trauma Site Documentation Phase IV: Regional Expansion
    McGehee, Daniel V. ;
    Buresh, Chris
    2021-06-20 | PDF
    TraumaHawk, a smartphone app for law enforcement and first responders, was designed by the University of Iowa (UI) to connect pre-hospital emergency care to hospital trauma teams. At the scene of a crash, first responders use TraumaHawk to generate and send a report with vital collision information, as well as photographs showing extent of intrusio ...
  • Public Perceptions of Transportation Fees and Taxes in North Carolina 2020
    Public Perceptions of Transportation Fees and Taxes in North Carolina 2020
    McCaleb, Emeline ;
    Head, Weston
    2021-06-18 | PDF
    Changing trends in the automobile market are challenging the long-term sustainability of revenue streams—and possibly how the public perceives them. In response, North Carolina Department of Transportation (NCDOT) commissioned a survey to better understand how the public perceives transportation taxes and fees in 2019 and followed up with an update ...
  • Learning from USACE Open Data for Locks
    Learning from USACE Open Data for Locks
    Chimka, Justin R.
    2021-06-14 | PDF
    The focus of this research was to analyze the Navigation and Civil Works Decision Support Center (NDC) Key Lock Report, “a monthly summary and year-to-year totals of commodity tonnages and barge traffic for key locks on the inland waterways (U.S. Army Corps of Engineers (USACE) Institute for Water Resources Planning Assistance Library).” This proje ...
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