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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 1821 - 1840 of 36873 results
  • Development of Deterioration Curves for Ohio Bridges Fact Sheet
    Development of Deterioration Curves for Ohio Bridges [Fact Sheet]
    Yoon, Yoojung ;
    Ahamed, Faysal
    2024-01-01 | PDF
    The objective of this research was to develop the deterioration curves of the primary bridge superstructure designs to understand their characteristics over time. The research methodologies involved a meticulous data collection and processing step, analyzing Ohio's historical bridge inventory dating back to the mid-1980s, followed by deterioration ...
  • Development of Deterioration Curves for Ohio Bridges
    Development of Deterioration Curves for Ohio Bridges
    Yoon, Yoojung ;
    Ahamed, Faysal
    2024-01-01 | PDF
    The objective of this research was to develop the deterioration curves of the primary bridge superstructure designs to understand their characteristics over time. The research methodologies involved a meticulous data collection and processing step, analyzing Ohio's historical bridge inventory dating back to the mid-1980s, followed by deterioration ...
  • Digitizing Traffic Control Infrastructure for Autonomous Vehicles AV Technical Report
    Digitizing Traffic Control Infrastructure for Autonomous Vehicles (AV): Technical Report
    Wu, Jason (Dayong) ;
    Miller, Matthew
    2024-01-01 | PDF
    High precision road maps are a crucial component to facilitating autonomous driving techniques. Although current Autonomous vehicles (AVs) rely on vehicular sensing techniques (e.g., camera, light detection and ranging [LiDAR], radar), studies have suggested that creating high-quality road maps with traffic control infrastructures (TCIs) (e.g., tra ...
  • Older Road Users Safety in Louisiana Understanding the Crash Contributing Factors Research Project Capsule 242SA
    Older Road Users Safety in Louisiana: Understanding the Crash Contributing Factors Research: Project Capsule [24–2SA]
    Mitran, Elisabeta ;
    Rupnow, Tyson
    2024-01-01 | PDF
    The objectives of this study are to investigate the factors contributing to older road user crashes in Louisiana and to recommend effective countermeasures to support the SHSP strategies in reducing traffic fatalities and severe injuries.
  • Tort Liability for TxDOT from CAV Technologies
    Tort Liability for TxDOT from C/AV Technologies
    Blewett, Becky ;
    Barham, Misty
    2024-01-01 | PDF
    Connected and autonomous vehicles (C/AV) present the opportunity for momentous and positive changes to most aspects of modern life. When described, the impact to mobility is imagined as safer and more efficient. This comes from the chance to build a self-driving and connected network of vehicles, infrastructure, and supporting data exchanges.... As ...
  • Developing Safety Performance Functions for Utah Roadways and Intersections
    Developing Safety Performance Functions for Utah Roadways and Intersections
    Schultz, Grant G. ;
    Warr, Richard L
    2024-01-01 | PDF
    The Highway Safety Manual (HSM), published by the American Association of State Highway and Transportation Officials (AASHTO) provides guidance as to the development of predictive models used to estimate the predicated average crash frequency for a particular site using regression models developed from data for similar sites across a network. These ...
  • A Freight Stop Purpose Model Using Enriched GPS Data
    A Freight Stop Purpose Model Using Enriched GPS Data
    Stinson, Monique ;
    Sahin, Olcay
    2024-01-01 | PDF
    Truck tour data are important for understanding freight truck operations and their impacts on the economy, congestion, and sustainability. Tour data capture the movements of trucks as they travel from their depots to make various stops before returning to their depots. Understanding the purpose of these stops (pickup, delivery, rest, etc.) is an es ...
  • Sidewalking A Toolkit for Engaging Youth in Planning and Designing Urban Mobility Futures
    Sidewalking: A Toolkit for Engaging Youth in Planning and Designing Urban Mobility Futures
    Nelischer, Claire ;
    Cuff, Dana
    2024-01-01 | PDF
    The Sidewalking toolkit supports youth mobility and youth agency by sharing effective, design-based strategies for engaging young people in envisioning their own mobility futures. We created this guide to help planners, designers, policymakers, and advocates who are already invested in supporting safe, social mobility options for youth, and who are ...
  • The Future of Airports A Vision of 2040 and 2070
    The Future of Airports: A Vision of 2040 and 2070
    Le Bris, Gaël ;
    Nguyen, Loup-Giang
    2024-01-01 | PDF
    This document is the result of that five-year process, and it is the second version of the research report on the future of airports at the 20- and 50-year horizons. It should be read as a guide to understand the challenges and opportunities ahead. It features tools and technical contents documenting trends and emerging issues. Finally, it contains ...
  • On the Adversarial Robustness of CameraBased 3D Object Detection
    On the Adversarial Robustness of Camera-Based 3D Object Detection
    Xie, Shaoyuan ;
    Li, Zichao
    2024-01-01 | PDF
    In recent years, camera-based 3D object detection has gained widespread attention for its ability to achieve high performance with low computational cost. However, the robustness of these methods to adversarial attacks has not been thoroughly examined, especially when considering their deployment in safety-critical domains like autonomous driving. ...
  • Repair or Strengthening of Bridge Decks with PartialDepth Precast Deck Panels
    Repair or Strengthening of Bridge Decks with Partial-Depth Precast Deck Panels
    Pantelides, Chris P. ;
    Briggs, Dylan T
    2024-01-01 | PDF
    The primary objectives of this research project involve: (a) forensic analysis of composite deck samples from the I-15 800 South bridge; (b) replication of non-composite specimens for testing; (c) destructive testing of retrofitted non-composite deck samples; and (d) recommended solutions for the repair of bridges affected by debonding of the cast- ...
  • Minnesota Drive Ramps Micro Surfacing Experimental Feature
    Minnesota Drive Ramps Micro Surfacing Experimental Feature
    Pavey, Andrew
    2024-01-01 | PDF
    During the 2020 construction season, the Alaska DOT&PF Central Region installed its first application of micro surfacing at 17 locations on Minnesota Drive ramps in the city of Anchorage. This treatment offers the potential to be a more economical solution to the typical mill and fill hot mix asphalt (HMA) treatment used to address rutted roads. Mi ...
  • Development of a Mobile App for Reporting Work Zone Intrusions
    Development of a Mobile App for Reporting Work Zone Intrusions
    Davis, Brian ;
    Morris, Nichole L.
    2024-01-01 | PDF
    Work zone intrusions represent a significant safety risk to workers. To help better understand these situations, the Minnesota Department of Transportation partnered with the University of Minnesota to create a method to document intrusion events. This information provides a deeper understanding of the circumstances under which these events occur a ...
  • Drivers Correctly Interpret Flashing Yellow Arrows for Left Turns Research Summary
    Drivers Correctly Interpret Flashing Yellow Arrows for Left Turns [Research Summary]
    Davis, Gary A. ;
    Lund, Victor
    2024-01-01 | PDF
    Permissive left turns, where a driver does not have a green arrow and must wait for a gap in oncoming traffic before turning, can be indicated by different traffic signal configurations. Flashing yellow arrows are becoming a preferred signal type in Minnesota and across the nation. New research provides traffic engineers with confidence that driver ...
  • Evaluation of Methods for UDOT Brine Tank Condition Assessment
    Evaluation of Methods for UDOT Brine Tank Condition Assessment
    Kami, Moein Ramezanpour ;
    Zhang, Keping
    2024-01-01 | PDF
    UDOT manages statewide above-ground storage tanks to store brine as deicing chemicals for the winter maintenance program. The polyethylene storage tanks will age under UV light, become brittle with low temperatures, creep, and develop cracks. Structural failures of brine tanks will not only impose safety hazards to surrounding tanks and UDOT person ...
  • TDOT RDS Data Quality Assurance and HighResolution Content Enhancement
    TDOT RDS Data Quality Assurance and High-Resolution Content Enhancement
    Barbour, William ;
    Baroud, Hiba
    2024-01-01 | PDF
    TDOT’s ITS radar detection system, spanning Tennessee’s urban interstates and highways, faced challenges with data quality and reliability, limiting its potential for advanced traffic management and analytics. This research aimed to enhance the system by standardizing configurations, recalibrating sensors, replacing outdated equipment, and implemen ...
  • Thermal Segregation Influence on Current Asphalt Mixtures
    Thermal Segregation Influence on Current Asphalt Mixtures
    Sebesta, Stephen ;
    Kim, Jinho
    2024-01-01 | PDF
    Thermal segregation during the construction of asphalt mixtures can result in the formation of low-density areas and a subsequent decrease in pavement life. Although the methods for measuring thermal segregation have remained largely unchanged, significant advancements have been made in asphalt mixture types and design methods over the past decade. ...
  • Development of Design Guidance for Smart Work Zone Systems
    Development of Design Guidance for Smart Work Zone Systems
    El-Rayes, Khaled ;
    Ouyang, Yanfeng
    2024-01-01 | PDF
    Smart work zone (SWZ) systems are designed to provide real-time roadway information to better inform motorists, encourage them to take alternate routes, reduce their frustrations, reduce roadway congestion, and enhance safety for motorists and workers. These SWZ systems have been recommended by multiple federal agencies as part of the Intelligent T ...
  • Review of Indiana Asphalt Binders InSitu PG Grade Asphalt Determination
    Review of Indiana Asphalt Binders (In-Situ PG Grade Asphalt Determination)
    Lee, Jusang M ;
    Pouranian, M Reza
    2024-01-01 | PDF
    In the face of multifaceted challenges, such as asphalt pavement deterioration and the introduction of new LTPPBind versions, the Indiana Department of Transportation (INDOT) initiated a pivotal research project focusing on three primary areas. First, the study examined the implications of Performance Grade (PG) binder selections on pavement perfor ...
  • Evaluation of WrongWay Driving Detection Technologies
    Evaluation of Wrong-Way Driving Detection Technologies
    Finley, Melisa D. ;
    Venglar, Steven P.
    2024-01-01 | PDF
    Wrong-way driving (WWD) crashes occur when a motorist either inadvertently or deliberately drives in the opposite direction of travel on a divided roadway. For this research project, Texas A&M Transportation Institute researchers assessed the state-of-the-practice regarding WWD detection technology, developed a standardized testing mechanism to ass ...
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