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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 2141 - 2160 of 36114 results
  • Local Technical Assistance Program Support on ComputerBased FDOT Intersection Control Evaluation ICE Training Summary
    Local Technical Assistance Program Support on Computer-Based FDOT Intersection Control Evaluation (ICE) Training [Summary]
    El-Urfali, Alan ;
    Chen, Cong
    2023-03-01 | PDF
    This project provided technical support through the Florida Local Technical Assistance Program (LTAP) to develop the ICE CBT.
  • Advanced Reinforced Concrete Materials for Transportation Infrastructures Technical Brief
    Advanced Reinforced Concrete Materials for Transportation Infrastructures [Technical Brief]
    Bandelt, Matthew J ;
    Venkiteela, Giri
    2023-03-01 | PDF
    The overall objective of this project was to understand how advanced materials can be used to improve the durability of reinforced concrete transportation infrastructure in the State of New Jersey. A primary focus of the research program was to investigate highly ductile concrete materials, often referred to as high-performance fiber-reinforced cem ...
  • Revegetation Success and Weed Resilience of Wyoming RightOfWay Reclamation
    Revegetation Success and Weed Resilience of Wyoming Right-Of-Way Reclamation
    Hufford, Kristina ;
    Moine, Joellyn
    2023-03-01 | PDF
    Roadside revegetation within highway rights-of-way is a final step in road construction, and often occurs in areas that are difficult to reclaim due to harsh climate conditions and impacts of land disturbance, including topsoil removal, soil compaction, and the presence of noxious and invasive weeds. Wyoming Department of Transportation managers ha ...
  • Modernizing Utility Infrastructure Management Early Identification and Location of Utility Facilities Within Iowa DOT Project Footprints
    Modernizing Utility Infrastructure Management: Early Identification and Location of Utility Facilities Within Iowa DOT Project Footprints
    Meis, Philip ;
    Sturgill, Roy E.
    2023-03-01 | PDF
    Identification of utilities within Iowa Department of Transportation (Iowa DOT) project footprints requires proactive documentation of utility infrastructure within Iowa DOT right-of-way (ROW) based on: 1) A standard for recording utility infrastructure, such as the new ASCE/CI/UESI 75-22 “Standard Guideline for Recording and Exchanging Utility Inf ...
    Supporting Files
  • Crossing Treatment Process for Safer Shared Use Path Crossings
    Crossing Treatment Process for Safer Shared Use Path Crossings
    Kumfer, Wesley ;
    Wright, John Waugh
    2023-03-01 | PDF
    Intersections with roadways are the most dangerous locations along shared use path (SUP) crossings for pedestrians and bicyclists. Despite this, there is limited research on the unique risks of these sites compared to other pedestrian and bicyclist facilities, and limited guidance exists for the geometric and operational characteristics that may ne ...
  • Assessment of Bridge Decks with Glass FiberReinforced Polymer GFRP Reinforcement
    Assessment of Bridge Decks with Glass Fiber-Reinforced Polymer (GFRP) Reinforcement
    Shafei, Behrouz ;
    Phares, Brent
    2023-03-01 | PDF
    In 2018, the Minnesota Department of Transportation (MnDOT) constructed a pair of side-by-side bridges on TH 169 over Elm Creek, with glass fiber-reinforced polymer (GFRP) reinforcement used in one deck and conventional epoxy-coated steel reinforcement used in the other. To understand the behavior of GFRP reinforcement and compare the performance a ...
  • LOwering CO2 Models to Optimize Train Infrastructure Vehicles and Energy Storage LOCOMOTIVES Northwestern University Freight Rail Infrastructure and Energy Network Decarbonization NUFRIEND Framework
    LOwering CO2: Models to Optimize Train Infrastructure, Vehicles, and Energy Storage (LOCOMOTIVES): Northwestern University Freight Rail Infrastructure and Energy Network Decarbonization (NUFRIEND) Framework
    Hernandez, Adrian ;
    Ng, Max
    2023-03-01 | PDF
    The goal of this project was to develop a tool to aid railroads and other stakeholders assess and approach the decarbonization of freight rail operations by identifying new, viable low-carbon energy storage and conversion systems for future locomotive systems and how they should be deployed on the existing US freight rail network.This record also c ...
    Supporting Files
  • Advanced Reinforced Concrete Materials for Transportation Infrastructure Final Report
    Advanced Reinforced Concrete Materials for Transportation Infrastructure: Final Report
    Bandelt, Matthew J ;
    Adams, Matthew P.
    2023-03-01 | PDF
    Transportation infrastructure systems must resist conditioning from the natural environment and physical demands from service loading to meet the needs of users across the state. Reinforced concrete, which is widely used in bridge decks, pavements, super-and substructures, and other systems, deteriorates under environmental conditioning due to elec ...
  • US Department of Transportation Capacity Assessment
    U.S. Department of Transportation Capacity Assessment
    United States. Department of Transportation  ...
    2023-03-01 | PDF
    In accordance with the Foundations for Evidence-Based Policymaking Act of 2018, Public Law No. 115-435 (Evidence Act), the United States Department of Transportation (DOT or the Department) is pleased to present the Capacity Assessment. The following report assesses DOT’s research, statistics, and evaluation capabilities based on a number of criter ...
  • CostBenefit Analysis of FuelEfficient Speed Control Using Signal Phasing and Timing SPaT Data Evaluation for Future Connected Corridor Deployment
    Cost/Benefit Analysis of Fuel-Efficient Speed Control Using Signal Phasing and Timing (SPaT) Data: Evaluation for Future Connected Corridor Deployment
    Levin, Michael W. ;
    Sun, Zongxuan
    2023-03-01 | PDF
    The objective of this methodology is to refine the preliminary results from previous work (11% fuel savings for one vehicle, one intersection) to an entire corridor of SPaT signals, with different CV market penetration, and with driver awareness of fuel savings benefits. The research will proceed in three parts. First, several vehicles will be inst ...
  • Implementation of Laboratory Conditioning and Testing Protocol to Evaluate Moisture Susceptibility of Asphalt Mixtures
    Implementation of Laboratory Conditioning and Testing Protocol to Evaluate Moisture Susceptibility of Asphalt Mixtures
    Coleri, Erdem ;
    Kumar, Vikas
    2023-03-01 | PDF
    Moisture damage in asphalt mixtures can cause early cracking and rutting failures due to the internal damage accumulated by the high internal pore pressures created at the aggregate-binder interface and/or within the binder phase by heavy traffic loads. Due to the high precipitation levels and frequent rain events, distresses originating from moist ...
  • Pavement Structural Analysis Tool PSAT for Iowa Local Roads
    Pavement Structural Analysis Tool (PSAT) for Iowa Local Roads
    Citir, Nazik ;
    Ceylan, Halil
    2023-03-01 | PDF
    Iowa has three classes of public roads: state primary highways, county (secondary) roads, and city streets. Among these, Iowa county roads serve rural Iowa transport needs by assuring a public road connection (i.e., to local access roads) for serving as conduits that channel the flow of people and commodities to and from towns and terminals (i.e., ...
  • Development of Pavement Structural Analysis Tool PSAT for Iowa Local Roads Summary
    Development of Pavement Structural Analysis Tool (PSAT) for Iowa Local Roads [Summary]
    Ceylan, Halil ;
    Kim, Sunghwan
    2023-03-01 | PDF
    This study developed a user-friendly tool that allows local agencies to understand the current structural capacities of their pavement assets, prioritize their preservation and rehabilitation needs, and make better-informed pavement infrastructure decisions.
  • 2022 Maryland Commuter Survey
    2022 Maryland Commuter Survey
    Harvey, Chester ;
    Shokputov, Alibi
    2023-03-01 | PDF
    The Maryland Commuter Survey (MCS) is a new survey of adult workers in Maryland designed to measure annual trends in commuting and remote work. The 2022 MCS is its first iteration, providing baseline understanding of commuting rates and patterns as Maryland exits the COVID-19 pandemic. This survey and future iterations will shed light on topics inc ...
  • Express Lane Marker Color Human Factors Study on Concrete and OpenGraded Friction Course Summary
    Express Lane Marker Color Human Factors Study on Concrete and Open-Graded Friction Course [Summary]
    Byram, Karen ;
    Ali, Hesham
    2023-03-01 | PDF
    The objectives of this research project were to test the visibility and recognition of ELMs with different color patterns and to conduct a performance test of the ELMs on an OGFC surface. This project also developed recommendations and specifications for ELMs on OGFC surfaces.
  • Optimizing the Performance of Item 404Low Volume Traffic Mixes Fact Sheet
    Optimizing the Performance of Item 404-Low Volume Traffic Mixes [Fact Sheet]
    Abbas, Ala R. ;
    Nazzal, Munir
    2023-03-01 | PDF
    This research project involved the following: • Online survey: An online survey was conducted in this study to document the current state-of-the-practice by Ohio LPAs regarding the use of 404LVT asphalt mix design specifications. • Laboratory study: A laboratory testing plan was designed and implemented in this study to examine the effects of vario ...
  • Optimizing the Performance of Item 404Low Volume Traffic Mixes
    Optimizing the Performance of Item 404-Low Volume Traffic Mixes
    Abbas, Ala R. ;
    Nazzal, Munir
    2023-03-01 | PDF
    Most local public agencies (LPAs) in Ohio follow the Ohio Department of Transportation (ODOT) specifications for designing asphalt mixtures placed on low‐volume roads, with the majority of these agencies using Type 1 surface mixes prepared using PG 64‐22 asphalt binders. As an alternative, some LPAs use a mix known as 404LVT, which is a fine-graded ...
  • Inlet Protection Comparison for Sediment Control on Roadway Construction Fact Sheet
    Inlet Protection Comparison for Sediment Control on Roadway Construction [Fact Sheet]
    Tangirala, Anil ;
    Kerns, Justin
    2023-03-01 | PDF
    The Inlet Protection Comparison for Sediment Control on Roadway Construction research project intends to provide Ohio Department of Transportation (ODOT) with performance data associated with key criteria for manufactured inlet protection devices in order to assess which products are appropriate for inlet sediment controls on ODOT roadway construct ...
  • Characterizing Strength Loss in High Plasticity Clays along Alabama Highways
    Characterizing Strength Loss in High Plasticity Clays along Alabama Highways
    Xuan, Mengwei ;
    Montgomery, Jack
    2023-03-01 | PDF
    Strength loss in high plasticity clay soils is a common occurrence along roadways in western and central Alabama and has considerable impact on pavement distress and slope failures. Approximately $16 million was spent to repair slope failures in western and central Alabama between 2005 and 2015 with many of these failures occurring in areas with hi ...
  • Domestic Airline Fares Consumer Report First Quarter 2006 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: First Quarter 2006 Passenger and Fare Information
    United States. Department of Transportation
    2023-03-01 | 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 ...
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