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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 5561 - 5580 of 36958 results
  • Assessing Crash Risks of Evacuation Traffic A Simulationbased Approach
    Assessing Crash Risks of Evacuation Traffic: A Simulation-based Approach
    Hasan, Samiul ;
    Rahman, Rezaur
    2019-12-01 | PDF
    Recently, hurricanes have caused major concern for transportation agencies and policymakers attempting to find better evacuation strategies. This was especially evident after Hurricane Irma, which forced about 6.5 million Floridians to evacuate the state. This mass evacuation caused a significant amount of delays on state highways due to heavy cong ...
  • Data and Modeling Support of OffLine and RealTime Decisions Associated with Integrated Corridor Management
    Data and Modeling Support of Off-Line and Real-Time Decisions Associated with Integrated Corridor Management
    Hadi, Mohammed ;
    Xiao, Yan
    2019-12-01 | PDF
    A Decisions support systems (DSS) is considered an important component of ICM. A DSS provides the necessary support for real-time operations as well as planning for operations of the transportation systems. Previous national ICM efforts have utilized offline and online decision support modules based on data from multiple sources and modeling tools. ...
  • The Application of Unmanned Aerial Systems in Surface Transportation Volume I Executive Summary
    The Application of Unmanned Aerial Systems in Surface Transportation- Volume I: Executive Summary
    Knodler Jr., Michael A. ;
    Fitzpatrick, Cole D.
    2019-12-01 | PDF
    Volume I of this two-volume report summarizes a research project designed to assist MassDOT in thedevelopment of a pilot program for applying unmanned aerial system (UAS) technology to addresssurface transportation needs in the Commonwealth. In order to provide MassDOT with a comprehensiveunderstanding of the advantages, challenges, and other aspec ...
  • Development of Possible Solutions to Eliminate or Reduce Deck Cracking on Skewed Bridges Built by Using the Accelerated Bridge Construction Method
    Development of Possible Solutions to Eliminate or Reduce Deck Cracking on Skewed Bridges Built by Using the Accelerated Bridge Construction Method
    Chorzepa, Mi G ;
    Solae, Chnar
    2019-12-01 | PDF
    The Georgia Department of Transportation (GDOT) employed Accelerated Bridge Construction (ABC) technology to reduce construction impacts and delays when replacing the State Route 299 bridge at I-24 in Dade County, Georgia, over a single weekend in May 2017. Self-Propelled Modular Transporters (SPMTs) were used for the bridge replacement. A few mont ...
  • Connected Emission Control Technologies for Freight Vehicles
    Connected Emission Control Technologies for Freight Vehicles
    Boriboonsomsin, Kanok ;
    Luo, Ji
    2019-12-01 | PDF
    This project explores how connected vehicle technology can be used to reduce the impacts of air pollutant emissions from freight vehicles. Specifically, the objective of this project is to develop new vehicle routing algorithms for determining travel routes for heavy-duty diesel trucks that would reduce the exposure of local residents to air pollut ...
  • HERE Data Validation
    HERE Data Validation
    Chamberlin, Robert ;
    Haghighi, Nima
    2019-12-01 | PDF
    UDOT has purchased a contract from HERE for providing travel-time information for Utah highways. HERE travel-time estimates are primarily derived from GPS data obtained from in-vehicle navigation devices. In this research, UDOT is interested in learning how the travel-time estimates from HERE compare to another source of travel-time data, obtained ...
  • Improving Amphibian Roadway Mitigation To Decrease Mortality and Increase Connectivity by Experimenting With Ecopassage Design
    Improving Amphibian Roadway Mitigation To Decrease Mortality and Increase Connectivity by Experimenting With Ecopassage Design
    Hopkins, Charlene B ;
    Harman, Kristine E
    2019-12-01 | PDF
    The Nelsonville bypass, completed in 2013, runs through the largest remaining tract of continuous forest in Ohio, including wetlands and amphibian migration routes. Such habitat fragmentation affects wildlife populations by increasing mortality and reducing connectivity. Thus, the Ohio Department of Transportation (ODOT) installed wildlife mitigati ...
  • The Application of Unmanned Aerial Systems In Surface Transportation Volume II C Evaluation of UAS Highway SpeedSensing Application
    The Application of Unmanned Aerial Systems In Surface Transportation - Volume II- C: Evaluation of UAS Highway Speed-Sensing Application
    Fitzpatrick, Cole D. ;
    Knodler, Michael A.
    2019-12-01 | PDF
    This project explored the use of UAS as a traffic data collection tool as compared to traditional speed data collection instruments on roadways through a field study. Previous literature found that UAS are being utilized for survey work and are new devices used in the field of traffic data collection. Using the data collected in the field and a lit ...
  • Reducing Cracking in New Bridge Curbs
    Reducing Cracking in New Bridge Curbs
    Dave, Eshan ;
    Caron, Eric
    2019-12-01 | PDF
    In recent years, newly constructed curbs on New Hampshire Department of Transportation (NHDOT) single-span roadway bridges have suffered from early-age cracking. This study focuses on the survey and analysis of data collected at several bridges in an effort to find ways to reduce cracking in bridge curbs. Seventeen existing bridges that had been pl ...
  • Historic Survey of Roads in Idahos State Highway System Volume 2 Application of the National Register of Historic Places Criteria for Evaluation
    Historic Survey of Roads in Idaho’s State Highway System Volume 2: Application of the National Register of Historic Places Criteria for Evaluation
    Moffett, Chad ;
    Renfield, Sebastian
    2019-12-01 | PDF
    Volume 2: Application of the National Register of Historic Places Criteria for Evaluation (Evaluation Criteria) of the Historic Survey of Roads in Idaho’s State Highway System is the second component in the Idaho Transportation Department’s effort to evaluate roads currently within Idaho’s State Highway System. The purpose of the Evaluation Criteri ...
  • Division of Engineering Research on Call Agreement 31796 Task 2 Asymmetrical Deformation of Thermoplastic Pipe Analysis
    Division of Engineering Research on Call Agreement 31796. Task 2, Asymmetrical Deformation of Thermoplastic Pipe Analysis
    E.L. Robinson Engineering of Ohio Company  ...
    2019-12-01 | PDF
    This study investigated asymmetric deformation (racking) of installed thermoplastic pipe. ODOT construction records were reviewed to determine the extent of racking noted within Item 611 Conduit Evaluations. Next, a rational method for assessing racking was developed within the framework of the AASHTO LRFD Bridge Design Specifications, Section 12. ...
  • A Machine Vision Approach for Estimating Motion Discomfort in Simulators and in SelfDriving
    A Machine Vision Approach for Estimating Motion Discomfort in Simulators and in Self-Driving
    Lee, John D. ;
    Alsaid, Areen
    2019-12-01 | PDF
    Motion discomfort in highly automated vehicles and in simulators represents a persistent problem that might be mitigated if it can be monitored. In driving simulators, motion discomfort can compromise data collection. In highly automated vehicles, motion discomfort can discourage people from riding in such vehicles, undermining the potential safety ...
  • Civil Engineering Support for the Traffic Monitoring Program Summary
    Civil Engineering Support for the Traffic Monitoring Program [Summary]
    Moses, Ren
    2019-12-01 | PDF
    In a series of four tasks, Florida State University researchers examined the systems and procedures used for acquiring vehicle and pedestrian data on the SHS.
  • Investigation of Behavior of Skewed and UnSkewed Reinforced Concrete TBeam Bridges and Load Rating Improvement through Proxy Finite Element Analysis
    Investigation of Behavior of Skewed and Un-Skewed Reinforced Concrete T-Beam Bridges and Load Rating Improvement through Proxy Finite Element Analysis
    Schanck, Andrew ;
    Davids, Bill
    2019-12-01 | PDF
    Maine’s bridge inventory includes a significant number of reinforced concrete T-beam bridges, both with and without skew. Many of these bridges were built in the first half of the 20th century for design loadings much lower than those considered today, causing a significant number of them to have low flexural rating factors. Despite this, these bri ...
  • Evaluation of Truck Tonnage Estimation Methodologies
    Evaluation of Truck Tonnage Estimation Methodologies
    Kaisar, Evangelos I. ;
    Liu, Dan
    2019-12-01 | PDF
    Truck tonnage is an important mobility measure to evaluate transportation system performance, which can identify how much freight is moved. This study develops a methodology for truck tonnage estimation, which consists of three main parts: (i) Weigh in Motion (WIM) sites clustering, (ii) truck volume estimation based on Telemetric Traffic Monitorin ...
  • Impact of Extreme Summer Temperatures on Bridge Structures
    Impact of Extreme Summer Temperatures on Bridge Structures
    Hagedorn, Ryan ;
    Dang, Canh
    2019-12-01 | PDF
    Researchers have shown that the heat waves affect thermal expansion joints, accelerate material degradation, and increase stresses in prestressed concrete girders. In particular, experimental and analytical investigations indicate a significant increase in stresses at both the tension and compression regions during extreme summer temperatures. The ...
  • Expanding Landowner Adoption of Snow Control Measures Through a Better Understanding of Landowner Knowledge Attitudes and Practices
    Expanding Landowner Adoption of Snow Control Measures Through a Better Understanding of Landowner Knowledge, Attitudes and Practices
    Current, Dean ;
    Motschke, Collin
    2019-12-01 | PDF
    Previous research demonstrated the ability of snow fences to significantly lower both public and private costs related to the control of blowing and drifting snow. Follow-up research specifically addressed the knowledge of MnDOT staff and attitudes and practices related to the promotion and implementation of snow control measures. These efforts ide ...
  • Research Project 930919 GeoGIS 2019 Development and Support
    Research Project 930-919, GeoGIS 2019 Development and Support
    University Transportation Center for Alabama  ...
    2019-12-01 | PDF
    GeoGIS is a web-based geotechnical database management system that is being developed for the Alabama Department of Transportation (ALDOT). The purpose of GeoGIS is to facilitate the efficient storage and retrieval of geotechnical documents for ALDOT. The website utilizes a web-based map to search for documents based on the location of the project ...
  • The Application of Unmanned Aerial Systems In Surface Transportation Volume IIFDrone Cyber Security Assurance Methods and Standards
    The Application of Unmanned Aerial Systems In Surface Transportation – Volume II-F:Drone Cyber Security: Assurance Methods and Standards
    Jafary, Bentolhoda ;
    Bhattacharya, Saikath
    2019-12-01 | PDF
    Unmanned Aerial Systems (UAS) will inevitably occupy commercial airspace in increasing numbers to provide a range of government and private services. UAS are cyber-physical systems and will therefore be subject to cyberattacks. Hardware, software, communications and data must be protected. To promote cyber risk management, this study examined past ...
  • High Friction Surface Treatment Experimental Feature Final Report and 3rd Year Monitoring Results
    High Friction Surface Treatment Experimental Feature – Final Report and 3rd Year Monitoring Results
    Alaska. Department of Transportation and Public Facilities  ...
    2019-12-01 | PDF
    This project monitored high friction surface treatment (HFST) at 30 locations throughout Central Alaska between 2016 and 2019. Monitoring indicates a loss of friction at all locations. There is a greater loss of friction associated with higher annual average daily traffic (AADT) per lane, high speeds and in curves. Overall, the friction loss in the ...
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