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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 2401 - 2420 of 35909 results
  • Enhanced GIS Legacy Database for TDOT Legacy Data Phase III Power BI Applications
    Enhanced GIS Legacy Database for TDOT Legacy Data Phase III: Power BI Applications
    Allen, Madeline ;
    Abkowitz, Mark
    2022-09-01 | PDF
    TDOT has embarked on an initiative to develop data analytics and visualization capabilities using the Microsoft Power BI platform to serve the agency’s needs. Critical to the success of this initiative is the ability to identify, develop and serve a range of applications across TDOT’s various divisions, covering a variety of operating modes within ...
  • Investigation of Illegal Weigh Station Bypassing
    Investigation of Illegal Weigh Station Bypassing
    Brown, Mallory ;
    Martin, Andrew
    2022-09-01 | PDF
    This study recommends best practices to curb illegal weigh station bypassing by commercial motor vehicles (CMVs). Analysis of historical data collected by Kentucky State Police – Commercial Vehicle Enforcement (KSP-CVE) for 2017-2021 revealed that CMV drivers were charged with illegally bypassing weigh stations 2,616 times. Drivers were charged wit ...
  • Phase 1 Development of County Bridge Standards for Single Span Concrete Slab Bridges
    Phase 1: Development of County Bridge Standards for Single Span Concrete Slab Bridges
    Fleming, Bradley ;
    Opheim, Joshua
    2022-09-01 | PDF
    Nearly 10.5% of all highway bridges in the United States are classified as concrete slab bridges according to the U.S. 2020 National Bridge Inventory (NBI). Concrete slab bridges are typically single spans (20-50 feet) or multiple spans for relatively short stream crossings. The Iowa Department of Transportation (Iowa DOT) currently has three-span ...
  • Steel Bridge Coating Evaluation and Rating Criteria
    Steel Bridge Coating Evaluation and Rating Criteria
    Bowman, Mark D. ;
    Hagan, Bryan D
    2022-09-01 | PDF
    The aim of the study is to gather information on three topics: (1) the evaluation and rating of steel bridge protective coatings, (2) coating systems used by various states throughout the United States, and (3) maintenance painting procedures employed by various state department of transportation agencies (DOTs). First, it was found that most state ...
  • US Department of Transportation DEIA Strategic Plan Advancing Diversity Equity Inclusion and Accessibility
    U.S. Department of Transportation DEIA Strategic Plan: Advancing Diversity, Equity, Inclusion, and Accessibility
    United States. Department of Transportation
    2022-09-01 | PDF
    On June 25, 2021, President Biden signed Executive Order (EO) 14035, Advancing Diversity, Equity, Inclusion, and Accessibility (DEIA) in the Federal Workforce. This EO launched a whole-of-government initiative to cultivate a federal workforce that draws from the full diversity of the Nation and advances equitable employment opportunities. The EO re ...
  • Assessing the Economic Effects of ContextSensitive Main Street Highways in Small Cities
    Assessing the Economic Effects of Context-Sensitive Main Street Highways in Small Cities
    Fonseca-Sarmiento, Camila ;
    Zeerak, Raihana
    2022-09-01 | PDF
    Complete Streets is a transportation policy and design approach that requires streets to be planned, designed, operated, and maintained to enable safe, convenient, and comfortable travel and access for users of all ages and abilities regardless of their mode of transportation. While there have been multiple studies on Complete Streets in metropolit ...
  • Statistical Inference for Multimodal Travel Time Reliability
    Statistical Inference for Multimodal Travel Time Reliability
    Unnikrishnan, Avinash ;
    Kochar, Subash
    2022-09-01 | PDF
    Travel time reliability is a key metric of interest to practitioners and researchers because it affects travel choice and the economic competitiveness of urban areas. This research focuses on three travel time reliability metrics – buffer index, modified buffer index, and the relative width of travel time distributions. The key novel contributions ...
  • Using Automated Traffic Signal Performance Measures To Improve Signal Timings
    Using Automated Traffic Signal Performance Measures To Improve Signal Timings
    Li, Xiugang
    ORCID ICON IMG
    2022-09-01 | PDF
    This report describes the use of automated traffic signal performance measures for Oregon Department of Transportation. The report presents case studies of signal coordination and running yellow and red lights.
  • ConnectivityBased Cooperative Ramp Merging in Multimodal and Mixed Traffic Environment
    Connectivity-Based Cooperative Ramp Merging in Multimodal and Mixed Traffic Environment
    Wu, Guoyuan ;
    Zhao, Xuanpeng
    2022-09-01 | PDF
    Freeway ramp merging involves conflict of vehicle movements that may lead to traffic bottlenecks or accidents. Thanks to advances in connected and automated vehicle (CAV) technology, a number of efficient ramp merging strategies have been developed. However, most of the existing CAV-based ramp merging strategies assume that all the vehicles are CAV ...
  • Demonstration Project for Asphalt Performance Engineered Mixture Design Testing
    Demonstration Project for Asphalt Performance Engineered Mixture Design Testing
    Rahbar-Rastegar, Reyhaneh ;
    Huber, Gerald
    2022-09-01 | PDF
    The asphalt industry is moving towards performance-based methods for asphalt mixture design. The Federal HighwayAdministration (FHWA) is supportive of state departments of transportations (DOT) adopting index and predictive performance tests, especially those making use of the Asphalt Mixture Performance Tester (AMPT). The FHWA is therefore encoura ...
  • Investigation of the Causes of Transverse Bridge Deck Cracking
    Investigation of the Causes of Transverse Bridge Deck Cracking
    Phares, Brent M. ;
    Liu, Zhengyu
    2022-09-01 | PDF
    Transverse cracks in concrete bridge decks sometimes initiate in the early stages of the bridge service life, usually just after construction. Cracks in the bridge deck can accelerate the deterioration of the deck concrete, provide a direct pathway for the intrusion of water and chlorides to the deck reinforcement, and detract from the aesthetics. ...
  • Development of Guidance for Unsignalized Intersections on Rural Multilane Divided Highways
    Development of Guidance for Unsignalized Intersections on Rural Multilane Divided Highways
    Turochy, Rod E ;
    Zhou, Huaguo
    2022-09-01 | PDF
    This research project examines the safety performance of unsignalized intersections on rural divided highways in Alabama. A summary of the safety problem at these intersections is provided; the concern is the relatively high frequency and severity of crashes at these locations, typically associated with vehicles entering from the minor road and fai ...
  • Towards Sustainable Tourism Transportation Systems and Services in Tennessee
    Towards Sustainable Tourism Transportation Systems and Services in Tennessee
    Mishra, Sabyasachee ;
    Golias, Mihalis M.
    2022-09-01 | PDF
    Tennessee is home to some of the most popular tourist destinations in the country and the tourism industry contributes considerably to Tennessee’s economy. The industry in the state has grown considerably in the previous years and there is a need to identify and address issues related to transportation services to accommodate needs and requirements ...
  • Assessing the Effectiveness of Friction as a Performance Management Tool in Colorado
    Assessing the Effectiveness of Friction as a Performance Management Tool in Colorado
    Fay, Laura ;
    Clouser, Karalyn
    2022-09-01 | PDF
    The objective of this project was to evaluate the feasibility of using roadway friction data as a key component of a winter maintenance performance management tool by the Colorado Department of Transportation (CDOT). Work accomplished to support these findings identified states and countries that are using roadway friction data in performance manag ...
  • UltraHighPerformance Concrete UHPC Use in Florida Structural Applications
    Ultra-High-Performance Concrete (UHPC) Use in Florida Structural Applications
    Riding, Kyle A ;
    Ferraro, Christopher C.
    2022-09-01 | PDF
    In order for UHPC to be implemented in Florida structures and realize its potential benefits, research was needed to develop specifications for UHPC materials not supplied as prebagged materials. The research objective of this project was to establish mixing, placing, curing and durability requirements and test methods necessary to produce durable, ...
  • Evaluation of Galvanized and Painted Galvanized Steel Piling
    Evaluation of Galvanized and Painted Galvanized Steel Piling
    Liu, Zhengyu ;
    Dahlberg, Justin
    2022-09-01 | PDF
    This project investigated the long-term protection of steel piles with galvanized and painted galvanized coatings using a corrosion chamber to accelerate corrosion effects in the laboratory. Further investigation was completed through observation of painted galvanized piles installed in the field at a newly constructed bridge in Buchanan County, Io ...
  • Nondestructive Detection of Pile Length for HighMast Light Towers Technical Summary
    Nondestructive Detection of Pile Length for High-Mast Light Towers [Technical Summary]
    Lamb, Rich ;
    Guzina, Bojan
    2022-09-01 | PDF
    The goal of this project was to develop a nondestructive method, including hardware and offline data analysis, for determining in-place pile lengths.
  • Evaluation of the Performance of A709 Grade 65 QST Bridge Steel
    Evaluation of the Performance of A709 Grade 65 QST Bridge Steel
    Dahlberg, Justin M.
    2022-09-01 | PDF
    The primary goal for this project was to evaluate the efficacy of A709 Grade QST 65 steel for use in Iowa bridge projects. The objectives of the project were as follows: Identify the current state of use of A709 Grade QST 65 steel in bridge projects; Identify the ductility and strength characteristics of A709 Grade QST 65 steel through full-scale l ...
  • NonTraffic Surveillance Analytical Users Manual 20162020
    Non-Traffic Surveillance Analytical User’s Manual, 2016-2020
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2022-09-01 | National Transportation Statistics (NTS) | PDF
    This is the updated and revised Non-Traffic Surveillance (NTS) Analytical User’s Manual for the period 2016 to 2020.
  • Study of Operational and Safety Impacts of Disabled and Abandoned Vehicles on FDOT Roadways
    Study of Operational and Safety Impacts of Disabled and Abandoned Vehicles on FDOT Roadways
    Al-Deek, Haitham ;
    Sandt, Adrian
    2022-09-01 | PDF
    Disabled and abandoned vehicles (DAVs) are a common occurrence on Florida roadways. This research focused on evaluating the operational and safety impacts of DAVs and identifying and evaluating methods to reduce these impacts. A comprehensive literature review showed that previous studies focused on DAV response (including the use of innovative tow ...
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