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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 3921 - 3940 of 36908 results
  • 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 | PDF
    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 ...
  • CTDOT Specification Requirements for Minimum Asphalt Requirements
    CTDOT Specification Requirements for Minimum Asphalt Requirements
    Zinke, Scott ;
    Mahoney, James
    2021-06-14 | PDF
    CTDOT minimum asphalt requirements have resulted in roadway mixes being produced with finer aggregate gradations in recent years than they have in the past. This research was conducted to investigate the possibility of lowering the minimum asphalt content requirements in an effort to drive the mix gradations coarser without compromising the perform ...
  • Cost of Plug-In Electric Vehicle Ownership: The Cost of Transitioning to Five Million Plug-In Vehicles in California [supporting datasets]
    Chakraborty, Debapriya ;
    Buch, Koral
    2021-06-12 | PDF
    Total cost of ownership (TCO) studies are generally used as a tool to understand how and when the plug-in electric vehicle (PEV) technology will reach cost parity with conventional fuel vehicles. Post cost-parity, the PEV market should be able to sustain without government intervention. We present here a detailed analysis of vehicle manufacturing c ...
    Dataset Supporting Files
  • ConnectedAutomated Vehicle and Infrastructure Research Michigan Mobility Transformation Facility MTF
    Connected/Automated Vehicle and Infrastructure Research [Michigan Mobility Transformation Facility (MTF)]
    Sayer, James R.
    ORCID ICON IMG
    2021-06-11 | PDF
    The concept of the Michigan Mobility Transportation Facility, now known as Mcity, formed from a recognized need for a safe, controlled environment in which to develop various connected and automated vehicle (CAV) components that included interaction with real-world infrastructure. Therefore, one could say Mcity grew out of necessity; but it has als ...
  • River Ice Measurements for Transportation Safety in Rural Communities
    River Ice Measurements for Transportation Safety in Rural Communities
    Stuefer, Svetlana ;
    Richards, Elizabeth
    2021-06-10 | PDF
    This project is relevant to the cold areas of Federal Region 10, where transportation routes occur on the frozen surfaces of lakes and rivers for three to four months each year Transportation safety on ice roads is a complex problem that involves people, vehicles, river ice, and weather conditions. While all these factors must be considered, this s ...
  • 2020 Critical Update to Caltrans Wildfire Vulnerability Analysis [supporting dataset]
    Thorne, James H. ;
    Boynton, Ryan M
    2021-06-09 | PDF
    The data and materials presented here support a research project conducted by UC Davis in support of Caltrans, a transportation agency that is conducting a wildfire vulnerability risk assessment for fuels reduction in the right of Way (ROW) to protect Caltrans’ infrastructure and travelers. We reviewed the 21 layers used in a 2019 fire risk model a ...
    Dataset Supporting Files
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