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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 641 - 660 of 35811 results
  • Benefits Challenges and Opportunities of Different LastMile Delivery Strategies
    Benefits, Challenges, and Opportunities of Different Last-Mile Delivery Strategies
    Jaller, Miguel ;
    Pahwa, Anmol
    2024-12-01 | PDF
    As online shopping nears its third decade, it is clear that its impacts on urban goods flow are profound. Increased freight traffic and related negative externalities such as greenhouse gas emissions and local air pollution can impede sustainability goals. In response, e-retailers are exploring innovative distribution strategies to enhance last-mil ...
  • 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 ...
  • Use of Geothermal Energy for Deicing Approach Pavement Slabs and Bridge Decks Phase II Extension
    Use of Geothermal Energy for Deicing Approach Pavement Slabs and Bridge Decks: Phase II Extension
    Yu, Xinbao ;
    Puppala, Anand J.
    2024-12-01 | PDF
    The objective of the control system is to run the deicing system efficiently and effectively under different winter weather conditions. The system can be operated for bridge deicing in heat pump or bypass mode. The heat pump mode involves all four heat pumps and the GLHE during bridge deicing, while the bypass mode only relies on GLHE to heat the b ...
  • Significant Factors of Bridge Deterioration Final Report
    Significant Factors of Bridge Deterioration: Final Report
    Fick, Damon ;
    Bell, Mathew
    2024-12-01 | PDF
    Bridges structures deteriorate over time due to various factors. Understanding the factors that affect bridge deterioration rates is necessary for state agencies to maintain the safety and functionality of bridges during their design service life. To improve deterioration modeling in Montana, significant factors affecting bridge deterioration were ...
  • 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 ...
  • 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 ...
  • Resources and Tools to Improve Pedestrian Safety
    Resources and Tools to Improve Pedestrian Safety
    Finley, Kari ;
    Otto, Jay
    2024-12-01 | PDF
    While pedestrian safety is found in many Strategic Highway Safety Plans across the country, there may be potentially competing values and beliefs that influence the deployment of effective pedestrian safety strategies. Understanding shared values and beliefs among transportation stakeholders about pedestrian safety is critical to growing a positive ...
    Supporting Files
  • 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 ...
  • 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 ...
  • 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 ...
  • Effective Methods to Safely Communicate with Commercial Motor Vehicles Summary
    Effective Methods to Safely Communicate with Commercial Motor Vehicles [Summary]
    Edara, Praveen
    ORCID ICON IMG
    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 ...
  • TITAN An Interactive Webbased Framework for Transportation Data Integration and Analytics Phase 2 Summary
    TITAN – An Interactive, Web-based Framework for Transportation Data Integration and Analytics – Phase 2 [Summary]
    Adu-Gyamfi, Yaw
    ORCID ICON IMG
    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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Design Guidelines and Mitigation Strategies for Reducing Sedimentation of MultiBarrel Culverts Brief
    Design Guidelines and Mitigation Strategies for Reducing Sedimentation of Multi-Barrel Culverts [Brief]
    Muste, Marian
    ORCID ICON IMG
    2024-12-01 | PDF
    The accumulation of sediments at culverts is a chronic operational issue, frequently occurring at multi-barrel culverts located in erosion-prone watersheds. Sediment deposits can develop rapidly, impairing the culvert’s capacity to convey design flows and potentially leading to damage to both transportation infrastructure (e.g., road and culvert ov ...
  • 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 ...
  • 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 ...
  • Investigation of UAS Platform and Personnel Development and Preparation through Lab and Site Testing
    Investigation of UAS Platform and Personnel Development and Preparation through Lab and Site Testing
    Almasi, Pouya ;
    Zhang, Qianyun
    2024-12-01 | PDF
    We propose a pilot program to initialize the UAS-based bridge inspection program in component level to enhance the bridge inspection practice in New Mexico State. In the proposed program, UAS-based bridge inspection strategies, data interpretation frameworks, and implementation software for individual NBI classified bridge components will be develo ...
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