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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 2501 - 2520 of 36873 results
  • Field Monitoring of Wicking Geotextile for Moisture Reduction in Pavements
    Field Monitoring of Wicking Geotextile for Moisture Reduction in Pavements
    Han, Jie ;
    Liu, Hao
    2023-03-01 | PDF
    Water is often detrimental to the performance of pavements since it reduces soil strength and modulus and provides sources for erosion and freeze-thaw of base courses and subgrade. A common approach to removing water within pavements is to provide a drainage system, which is effective only when the soil beneath the pavement is saturated or nearly s ...
  • AMR LeaderFollower System TMA Evaluation
    AMR Leader-Follower System TMA Evaluation
    Brown, Henry ;
    Edara, Praveen
    2023-03-01 | PDF
    To reduce worker injuries in truck mounted attenuator (TMA) crashes, the Missouri Department of Transportation (MoDOT) is piloting a Leader-Follower TMA system, which allows the worker to be removed from the follower vehicle, in two districts. The objectives of this research study are to evaluate MoDOT’s pilot program for Leader-Follower TMAs in tw ...
  • Promoting Native Roadside Plant Communities and Ensuring Successful Vegetation Establishment Practices
    Promoting Native Roadside Plant Communities and Ensuring Successful Vegetation Establishment Practices
    Askew, Shawn D ;
    Goatley, James M
    2023-03-01 | PDF
    The loss of vegetation from roadside activities can lead to erosion and an increased sediment load in stormwater ponds. Current VDOT procedures regarding approved seed blends and establishment practices have led to inconsistent vegetation establishment and greatly rely on introduced species. Growing concerns regarding the threat of introduced, inva ...
  • Updating 2019 Safe Corridors Reports
    Updating 2019 Safe Corridors Reports
    Hopwood, Cory ;
    Motamed, Megan
    2023-03-01 | PDF
    NJDOT, in conjunction with the Division of State Police, is required to submit a Safe Corridors Program Assessment Report annually under N.J.S.A. 39:3-20.4. Therefore, there is a need to provide results of the safe corridor areas, as well as the highway safety projects and programs paid for by the fund, within the past year to the Senate Transporta ...
  • Toward a Florida Automated Connected Electric and Shared ACES Transportation System Roadmap Phase II
    Toward a Florida Automated, Connected, Electric, and Shared (ACES) Transportation System Roadmap: Phase II
    Lin, Pei-Sung ;
    Wang, Zhenyu
    2023-03-01 | PDF
    Automated, connected, electric, and shared (ACES) technologies are rapidly evolving and will continue to impact the development of vehicles, infrastructure, communities, commerce, and the economy. Based on the Florida ACES transportation system roadmap for Florida developed in Phase I, this project aimed to engage with private industries to leverag ...
  • Putting Research Into Practice Mitigating Projects Missing Deadlines Implementation Summary
    Putting Research Into Practice: Mitigating Projects Missing Deadlines [Implementation Summary]
    Bossert, Justin ;
    Kester, Chris
    2023-03-01 | PDF
    All construction contracts specify a deadline, either a specific date or a length of time. Construction schedules are compressed to meet deadlines and avoiding delays is crucial to delivering a project on time.
  • Evaluation and Refinement of Minnesota Queue Warning Systems
    Evaluation and Refinement of Minnesota Queue Warning Systems
    Hourdos, John ;
    Robbennolt, Jake
    2023-03-01 | PDF
    In previous research, investigators developed and deployed two warning systems, including MN-QWARN, which was installed on a segment of Interstate 94 (I-94) with a historically high crash rate. This system targeted shockwaves or initial stages of congestion based on the understanding that not all congestion events create high risks for crashes. Cer ...
  • Asphalt Crack Treatment FAQs and Technical Resources
    Asphalt Crack Treatment FAQs and Technical Resources
    Knapek, Dan ;
    Boder, Brian
    2023-03-01 | PDF
    Crack treatment is one of the most used pavement preservation practices and although the technique is simple, there are several nuances that make it more of an art than science. The purpose of this document is to provide: • An overview of crack treatment, • Guidance on several FAQs, and • A high-level summary of several technical resources. Crack s ...
  • Impact of Polymer Modification on IDEALCT and IFIT for Cracking Resistance Evaluation of Asphalt Mixtures
    Impact of Polymer Modification on IDEAL-CT and I-FIT for Cracking Resistance Evaluation of Asphalt Mixtures
    Yin, Fan ;
    Chen, Chen
    2023-03-01 | PDF
    This study evaluated the impact of polymer modification, without changing the base binder, on the intermediate-temperature cracking resistance of asphalt mixtures characterized using the Indirect Tensile Asphalt Cracking Test (IDEAL-CT) and the Illinois Flexibility Index Test (I-FIT). Twelve asphalt mixtures prepared with two mix designs and six vi ...
  • 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 ...
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