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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 1761 - 1780 of 36873 results
  • New Directions for Travel Behavior Modeling Lessons from Freight Studies
    New Directions for Travel Behavior Modeling: Lessons from Freight Studies
    Stinson, Monique ;
    Mohammadian, Abolfazl Kouros
    2024-02-01 | PDF
    Planners and policymakers rely on data and models to support infrastructure, operational, and other decisions. Attitudinal data, and models that use these data, provide insights into passenger travel behavior that cannot be easily explained by other types of data. However, collecting and using attitudinal data in transportation models has many chal ...
  • Transit Belabored Issues and Futures for Californias Frontline Transit Workforce
    Transit, Belabored: Issues and Futures for California’s Frontline Transit Workforce
    Wasserman, Jacob L. ;
    Padgett, Allie
    2024-02-01 | PDF
    Frontline transit work can be satisfying and secure—but also stressful or unsafe. Many agencies across the state lacked transit operators in the wake of the pandemic, delaying service restoration. Interviews, wage data, and other sources demonstrate that these shortages were due to both compensation issues and longstanding issues of workforce safet ...
  • New Repair Strategies for LifeCycle Extension of Corroded Steel Girder Bridges
    New Repair Strategies for Life-Cycle Extension of Corroded Steel Girder Bridges
    Tarasova, Anna ;
    Kanakamedala, Deven
    2024-02-01 | PDF
    Steel girder ends are susceptible to corrosion damage due to deicing salts, water, and other contaminants leaking from failed expansion joints. When corrosion becomes significant, it leads to a reduction in the sectional properties of steel girders and consequently reduces bearing and shear resistance. Conventional repair methods, although effectiv ...
  • Advanced Air Mobility Opportunities Challenges and Research Needs for the State of California 20232030
    Advanced Air Mobility: Opportunities, Challenges, and Research Needs for the State of California (2023–2030)
    Cohen, Adam ;
    Shaheen, Susan
    2024-02-01 | PDF
    Advanced air mobility (AAM) is a broad concept that enables consumers access to air mobility, goods delivery, and emergency services through an integrated and connected multimodal transportation network. AAM can provide short-range urban, suburban, and rural flights of about 50-miles and mid-range regional flights up to a several hundred miles. Sta ...
  • Recommendations for Future Specifications to Ensure Durable Next Generation of Concrete
    Recommendations for Future Specifications to Ensure Durable Next Generation of Concrete
    Kurtis, Kimberly E ;
    Stewart, Lauren K
    2024-02-01 | PDF
    Current Georgia Department of Transportation (GDOT) specifications for concrete rely on prescribing the materials and their proportions as well as minimum strength and workability requirements to indirectly control long-term performance. An alternative method, performance-based specifications (PBS), uses direct measures of long-term durability and ...
  • Analyzing Human Mobility for Active Transportation Planning in Louisiana Technical Summary
    Analyzing Human Mobility for Active Transportation Planning in Louisiana [Technical Summary]
    Bian, Ruijie “Rebecca” ;
    Mitran, Elisabeta
    2024-02-01 | PDF
    The main objective of the research is to identify areas in Louisiana that require active transportation infrastructure (such as sidewalks and crosswalks) the most. The needs were determined based on continuously collected anonymous human mobility data from mobile devices. An active transportation mobility index was developed based on the human mobi ...
  • Evaluation of Pavement ME Design Software for Flexible Pavements Summary
    Evaluation of Pavement ME Design Software for Flexible Pavements [Summary]
    Hayden, Mary Jane ;
    Goehl, Darlene C
    2024-02-01 | PDF
    The objectives of this research were to 1) provide the first step for the implementation of ME design for flexible pavements in Florida by comparing the 93 Method to the ME Design Method, 2) predict distresses to observed distresses of the PMED Version 2.6, and 3) provide recommendations for Florida-specific input parameters for the PMED Version 2. ...
  • Socioeconomic Data Development Methods for Travel Demand Model Inputs An Assessment of Socioeconomic Data Development Methods for TravelDemandModeling Input Preparation
    Socioeconomic Data Development Methods for Travel Demand Model Inputs: An Assessment of Socioeconomic Data Development Methods for Travel-Demand-Modeling Input Preparation
    Gresham, Craig ;
    Baird, Tim
    2024-02-01 | PDF
    The objective of this research project is to evaluate the current method to develop TAZ-level socioeconomic forecasts for counties in the state outside the Wasatch Front and explore options for reducing costs and improving data quality. The socioeconomic data forecasts are currently developed in a series of spreadsheets that must be manually update ...
  • Guidebook for Application of PolymerModified Asphalt Overlays From DecisionMaking to Implementation Tech Transfer Summary
    Guidebook for Application of Polymer-Modified Asphalt Overlays: From Decision-Making to Implementation [Tech Transfer Summary]
    Smadi, Omar ;
    Sassani, Alireza
    2024-02-01 | PDF
    The goal of the project was to lay the groundwork for the integration of PMA overlays into transportation agencies’ overall pavement preservation strategies by developing a guidebook that offers insights into the implementation and efficacy of the technique. The objectives were to survey the experiences of transportation agencies using PMA overlays ...
  • Calculating Plow Cycle Times from Automatic Vehicle Location AVL Data
    Calculating Plow Cycle Times from Automatic Vehicle Location (AVL) Data
    Lee, Ming-Shiun ;
    Crow, Mallory
    2024-02-01 | PDF
    Winter weather events can yield low visibility and/or lower the coefficient of friction on the road surface resulting in vehicular crashes or congestion. Transportation agencies are tasked with maintaining safe and reliable roadways for the traveling public which includes combating these snow and ice events. The traveling public’s demand for a high ...
  • Domestic Airline Fares Consumer Report Third Quarter 2023 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: Third Quarter 2023 Passenger and Fare Information
    United States. Department of Transportation
    2024-02-01 | Domestic Airline Fares Consumer Report | PDF
    Each month the Department of Transportation releases an Air Travel Consumer Report that includes information about various service quality elements, including flight delays, mishandled baggage, over sales, and a variety of other types of consumer complaints. In response to an increasing number of inquiries from consumers about domestic airline pric ...
  • Careers with Minnesotas Public Transportation Agencies Focus Group Summary Report
    Careers with Minnesota’s Public Transportation Agencies [Focus Group Summary Report]
    University of Minnesota  ...
    2024-02-01 | PDF
    This report contains a summary of the themes, codes, and sub-codes that emerged from the focus group discussions conducted for the Minnesota Local Road Research Board. Four focus groups were conducted between November 15 - 30, 2023 with the featured stakeholder groups: CDL license holders (4 participants), Jobseekers (8 participants), HR profession ...
  • Improved Systematic Analysis To Predict Roadway Safety Performance
    Improved Systematic Analysis To Predict Roadway Safety Performance
    Wang, Haizhong ;
    Li, Xiugang
    2024-02-01 | PDF
    This study presents the results of a review and developed framework for implementing a data-driven safety analysis in Oregon Department of Transportation’s project development process. This framework considered existing best practice methodologies at the federal level from the FHWA and Transportation Research Board as well as those currently being ...
  • Developing Load Distribution Formula for Louisiana CastinPlace Reinforced Concrete Box Culverts Technical Summary
    Developing Load Distribution Formula for Louisiana Cast-in-Place Reinforced Concrete Box Culverts [Technical Summary]
    Okeil, Ayman M. ;
    Alaywan, Walid
    2024-02-01 | PDF
    The primary objective of this project was to investigate live load distribution over buried CIP-RC box culverts for the purpose of recommending the most suitable LLDF that can be used in design and load rating. The goals of the project were to: 1. Conduct a parametric investigation of buried CIP-RC box culverts that covers key parameters known to a ...
  • Investigate Potential Connected and Automated Vehicle CAV Liability Issues Within TxDOT Research Report
    Investigate Potential Connected and Automated Vehicle (CAV) Liability Issues Within TxDOT: Research Report
    Hansen, Todd ;
    Hwang, Billy
    2024-02-01 | PDF
    Connected and automated vehicles (CAV) promise momentous and positive changes to most aspects of modern life. Mobility is likely to be characterized by collaborative, communicative and driverless vehicles operating in a connected network of vehicles, infrastructure and wireless devices. One of the most uncertain and as yet undefined areas where cha ...
  • Integrating Mobility Energy Productivity Metric into the CDOT Statewide Model
    Integrating Mobility Energy Productivity Metric into the CDOT Statewide Model
    Hoehne, Christopher ;
    Garikapati, Venu
    2024-02-01 | PDF
    The Mobility Energy Productivity (MEP) metric measures the quality of mobility at a specific location and can be used to evaluate how changes to transportation systems impact the mobility of that location over time, such as through infrastructure investments. The objective of this study is to demonstrate integration of the MEP metric into CDOT’s tr ...
  • Advancing Air Mobility in Illinois
    Advancing Air Mobility in Illinois
    Mahmassani, Hani S. ;
    Cummings, Christopher
    2024-02-01 | PDF
    Advanced air mobility (AAM) is a nascent market within the aviation sector of Illinois’ transportation system, promising enhanced movement of people and cargo to previously inaccessible or underserved locations. This project addresses AAM’s prospects and impacts in the state. The research encompasses several tasks, starting with an examination of t ...
  • Support for the ISTREET Implementing Solutions from Transportation Research and Evaluation of Emerging Technologies Testbed
    Support for the I-STREET™ (Implementing Solutions from Transportation Research and Evaluation of Emerging Technologies) Testbed
    Elefteriadou, Lily ;
    Manjunatha, Pruthvi
    2024-02-01 | PDF
    The University of Florida (UF) and its Transportation Institute (UFTI), the Florida Department of Transportation (FDOT), and the City of Gainesville (CoG) have partnered to create I-STREETTM (Implementing Solutions from Transportation Research and Evaluation of Emerging Technologies). The principal objective of the three partners in developing I-ST ...
  • US Highway 101 Coastal Hazard Vulnerability and Risk Assessment for Mitigation Prioritization
    US Highway 101 Coastal Hazard Vulnerability and Risk Assessment for Mitigation Prioritization
    Olsen, Michael J. ;
    Allan, Jon
    2024-02-01 | PDF
    US 101 is a vital economic and emergency lifeline that connects coastal communities and provides access to numerous coastal destinations for Oregonians and tourists. Many sections of this highway are highly susceptible to coastal hazards such as erosion, landsliding, wave action, storm surge, flooding, and rising sea levels. In general, US 101 on t ...
  • BrM QuantityBased Bridge Element DeteriorationImprovement Modeling and Software Tools
    BrM Quantity-Based Bridge Element Deterioration/Improvement Modeling and Software Tools
    Fu, Gongkang ;
    Bryk, Gabriel
    2024-02-01 | PDF
    This study reviewed the state of the art and practice in bridge element deterioration / improvement modeling. It also developed a new and practical method for such modeling using element quantities in BrM inspection records along with bridge age. For reliable forecasting, this method uses these quantities directly to determine transition probabilit ...
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