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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 1061 - 1080 of 36841 results
  • Advancing SelfEnforcing Streets Phase 1 The Relationship Between Roadway Environment and Crash Severity
    Advancing Self-Enforcing Streets Phase 1: The Relationship Between Roadway Environment and Crash Severity
    Talebpour, Alireza ;
    Zhang, Yanlin
    2024-12-01 | PDF
    The concept of self-enforcing roadways (SER) has been proposed as a speed management strategy to achieve harmony in drivers’ speed selection and to address safety issues associated with excessive speeding. While numerous examples of SER implementation exist outside of the United States (particularly in European countries), this concept is fairly ne ...
  • HFST Review
    HFST Review
    Khan, Zafrul ;
    Bledsoe, Jay F
    2024-12-01 | PDF
    The Missouri Department of Transportation (MoDOT) has implemented High Friction Surface Treatment (HFST) in various locations across the state to reduce roadway departure crashes by improving pavement friction. To prevent premature failure and to ensure that the HFST performs adequately throughout the design life, this study evaluates the pavement ...
  • Financial Feasibility of Maglev System in Texas
    Financial Feasibility of Maglev System in Texas
    Cline, Michael E. ;
    Easton, Carla
    2024-12-01 | PDF
    A brief description of different modes possible in the proposed TransTexas Corridor (TTC) is initiated. The main modal alternatives, which include highway, high speed rail, and maglev are discussed in detail. Alternatives for financing the TTC infrastructure are discussed. A detailed financial feasibility of a maglev system along a hypothetical cor ...
  • Inspection and Maintenance Guidelines for Mechanically Stabilized Earth Walls
    Inspection and Maintenance Guidelines for Mechanically Stabilized Earth Walls
    Barry, Michelle L. ;
    Coffman, Richard A.
    2024-12-01 | PDF
    This report outlines the results of a comprehensive study focused on enhancing maintenance and inspection practices for mechanically stabilized earth (MSE) walls. The project was sponsored by the Arkansas Department of Transportation (ARDOT), and its central objectives were to formulate the best management practices for MSE wall maintenance and dev ...
  • HFST Review Summary
    HFST Review [Summary]
    Bledsoe, James ;
    Alhasan, Ahmad
    2024-12-01 | PDF
    The Missouri Department of Transportation (MoDOT) has implemented High Friction Surface Treatment (HFST) in various locations across the state to reduce roadway departure crashes by improving pavement friction. To prevent premature failure and to ensure that the HFST performs adequately throughout the design life, this study evaluates the pavement ...
  • Guidance for Incorporating Work Zone Data within Traffic Management Operations
    Guidance for Incorporating Work Zone Data within Traffic Management Operations
    Knickerbocker, Skylar ;
    Ravichandra-Mouli, Varsha
    2024-12-01 | PDF
    The ability for agencies to notify vehicles that they are approaching a work zone has the potential to reduce crashes by increasing motorists’ awareness of the conditions. A critical element of this ability involves providing accurate work zone information and reducing the potential for false alerts that motorist ignore, which can be accomplished t ...
  • Best Management Practices for Liquid Chloride Storage and Pumping Systems
    Best Management Practices for Liquid Chloride Storage and Pumping Systems
    Clouser, Karalyn ;
    Fay, Laura
    2024-12-01 | PDF
    The objective of this project was to examine and document liquid deicing storage and pump systems currently being used by departments of transportation and public works agencies across the country and best practices for managing and maintaining these systems. Using information gathered from surveys and interviews with transportation agencies and ve ...
  • Cost Effective Alternatives for Mitigating Debris and Environmental Impacts Around Bridge Piers Fact Sheet
    Cost Effective Alternatives for Mitigating Debris and Environmental Impacts Around Bridge Piers [Fact Sheet]
    Witter, Jonathan D ;
    Raudenbush, Zane
    2024-12-01 | PDF
    This research study addressed three key problems: 1) identifying safer, timely, and cost-effective solutions for removing accumulated debris from bridge piers, 2) designing and implementing countermeasures to prevent debris accumulation, and 3) finding technological solutions to enhance bridge inspection, scour detection, and mapping of river cross ...
  • Holistic Quality Management of Precast Concrete Construction for Transportation Infrastructure
    Holistic Quality Management of Precast Concrete Construction for Transportation Infrastructure
    Cai, Hubo ;
    Dunston, Phillip S.
    2024-12-01 | PDF
    Precast concrete (PC) is manufactured in a controlled environment to provide desired quality, durability and efficiency to build transportation assets that address significant infrastructure challenges faced by the nation. Quality deficiencies during any lifecycle phase can easily off set the expected benefits, leading to premature failures and exc ...
  • TITAN An Interactive Webbased Framework for Transportation Data Integration and Analytics Phase 2
    TITAN – An Interactive, Web-based Framework for Transportation Data Integration and Analytics – Phase 2
    Adu-Gyamfi, Yaw ;
    Edara, Praveen K.
    2024-12-01 | PDF
    The TITAN project, now in its second phase, is a cutting-edge, interactive web-based framework designed for the warehousing, integration, analytics, and visualization of transportation data. This phase has successfully implemented resilient and scalable database architectures, enabling rapid storage and retrieval of massive datasets, which are crit ...
  • DecisionMaking Tool
    Decision-Making Tool
    Mukhopadhyay, Anol ;
    Mistri, Abhijit
    2024-12-01 | PDF
    The primary objective of Task 6 was to develop guidelines, recommendations, and a decision- making tool based on extensive laboratory performance evaluation of the selected sealers and coatings (Task 3, Chapter 3 in the Research Report [R1]) under both normal and accelerated weathering (QUV and QFOG exposure) followed by developing a rating system ...
  • Effective Methods to Safely Communicate with Commercial Motor Vehicles
    Effective Methods to Safely Communicate with Commercial Motor Vehicles
    Edara, Praveen K. ;
    Adu-Gyamfi, Yaw
    2024-12-01 | PDF
    One critical aspect of a proactive approach to improving the safety of commercial motor vehicles (CMVs) involves how to communicate with CMV drivers safely and effectively through an electronic notification system (ENS). The objectives of this project are to: 1) conduct a review of existing ENS methods in use by CMV drivers, trucking companies, and ...
  • Guidance for Incorporating Work Zone Data within Traffic Management Operations Brief
    Guidance for Incorporating Work Zone Data within Traffic Management Operations [Brief]
    Knickerbocker, Skylar ;
    Ravichandra-Mouli, Varsha
    2024-12-01 | PDF
    The ability for agencies to notify vehicles that they are approaching a work zone has the potential to reduce crashes by increasing motorists’ awareness of the conditions. A critical element of this ability involves providing accurate work zone information and reducing the potential for false alerts that motorist ignore, which can be accomplished t ...
  • Experiences from Early Implementations of UHPC Overlays TechNote
    Experiences from Early Implementations of UHPC Overlays [TechNote]
    Garber, David ;
    El-Helou, Rafic
    2024-12-01 | PDF
    Short-span bridge superstructures are commonly made of precast concrete elements, and those elements are proportioned according to the properties of conventional concrete. The emergence of ultra-high-performance concrete (UHPC), and the release of the AASHTO Guide Specification for Structural Design with UHPC, creates new possibilities for the rede ...
  • FourYear Trends of Personal Mobility Devices in Metropolitan Vancouver The Evolution of Mode Shares Speeds and Comfort in OffStreet Paths
    Four-Year Trends of Personal Mobility Devices in Metropolitan Vancouver: The Evolution of Mode Shares, Speeds, and Comfort in Off-Street Paths
    Bigazzi, Alexander York ;
    Hassanpour, Amir
    2024-12-01 | PDF
    Micromobility or personal mobility devices (PMD) such as bicycles, scooters, and skateboards, with or without electric-assist, are increasingly popular for urban travel, which poses challenges in the constrained spaces of cycling facilities and multi-use paths. Consequently, understanding the evolving usage of PMD and their impacts on other path us ...
  • Performance Characterization of an UltraHigh Performance Concrete Deck Connection for Alabama Bridges
    Performance Characterization of an Ultra-High Performance Concrete Deck Connection for Alabama Bridges
    Aaleti, Sriram ;
    Kreger, Michael E.
    2024-12-01 | PDF
    Cast-in-place bridges using normal concrete have been commonly used in the state of Alabama for short-span bridges. Even though their performance is satisfactory after construction and opening to traffic, this construction method requires a significant amount of construction time and on-site labor compared to the use of precast systems. The Acceler ...
  • Statewide Drone Registration Rule Development
    Statewide Drone Registration Rule Development
    Chamberlin, Robert
    2024-12-01 | PDF
    The Division of Aeronautics (DOA) has been working toward a robust Advanced Air Mobility (AAM) and Unmanned Aerial Systems (UAS) Program that could benefit both state agencies and commercial partners/operators. Over the past few years, the DOA office has been working with Utah Lawmakers to develop a regulatory framework. A Statewide Drone Registrat ...
  • Load Rating of Reinforced Concrete Slab Bridges Using Field Testing
    Load Rating of Reinforced Concrete Slab Bridges Using Field Testing
    Andrawes, Bassem ;
    Colombani, Isaias A
    2024-12-01 | PDF
    Bridge load-rating analysis is typically used to assess the safe load-carrying capacity of bridges. However, in many cases, this analytical approach was proven to be too conservative, which leads to unnecessary bridge postings and road restrictions. In such cases, field testing is sought as a more reliable method for assessing the structural condit ...
  • Zuni Bowl and One Rock Check Dam Research Phase 1
    Zuni Bowl and One Rock Check Dam Research – Phase 1
    Rio Grande Return
    2024-12-01 | PDF
    The Zuni Bowl and One Rock Check Dam Research Project, commissioned by the New Mexico Department of Transportation (NMDOT) and conducted by Rio Grande Return, investigates the effectiveness of Zuni Bowl and One Rock Dam structures as erosion control solutions for drainage issues affecting roadway infrastructure. This Phase 1A study aims to evaluate ...
  • Effectiveness of Short Solid Barriers to Reduce Noise Generated by Different Types of Highway Vehicles
    Effectiveness of Short Solid Barriers to Reduce Noise Generated by Different Types of Highway Vehicles
    Owolabi, Oludare ;
    Lodico, Dana
    2024-12-01 | PDF
    Tall highway noise barriers have served as an effective noise abatement strategy. However, it comes with the high cost and limited adoption in diverse environments. The purpose of this study was to investigate the feasibility and reasonableness of short safety barriers as a highway noise abatement strategy. Through purposeful selection, five out of ...
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