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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 6001 - 6020 of 36055 results
  • Assessing Measures of Transportation Disadvantage for Public Transportation Project Prioritization
    Assessing Measures of Transportation Disadvantage for Public Transportation Project Prioritization
    Gaustad, Brittany V. ;
    Wright, Waugh
    2019-03-01 | PDF
    The Strategic Transportation Investment Act (STI) was passed by the North Carolina (NC) Legislature in 2013, which “allows the NC Department of Transportation to use its funding more efficiently and effectively to enhance North Carolina’s infrastructure while supporting economic growth, job creation and a higher quality of life” by allocating “avai ...
  • Reassessing Child Pedestrian Mode Choice and Safety via Perceived Parental Risk
    Reassessing Child Pedestrian Mode Choice and Safety via Perceived Parental Risk
    Ferenchak, Nick ;
    Marshall, Wesley E.
    2019-03-01 | PDF
    Traditional pedestrian and bicyclist safety analyses typically examine crashes, injuries, or fatalities. However, this reactive approach only accounts for the places where people are currently walking or biking and those that are doing so. Would a proactive approach – examining areas where pedestrian and bicyclist activity is being suppressed becau ...
  • Premature Failure of Concrete Patching Reasons and Resolutions
    Premature Failure of Concrete Patching: Reasons and Resolutions
    Sprinkel, Michael M. ;
    Hossain, M. Shabbir
    2019-03-01 | PDF
    The performance of concrete patches in continuously reinforced concrete pavement in Virginia varies from less than 1 year to many years. The purpose of this study was to determine the causes of premature repair failure in continuously reinforced concrete pavement. Four pavement sections were monitored for patching operations. Mixture designs had hi ...
  • Synthesis of Service Life Prediction for Bridges in Texas Final Report
    Synthesis of Service Life Prediction for Bridges in Texas: Final Report
    Gao, Lu ;
    Mo, Yi-Lung
    2019-03-01 | PDF
    In procurement requirements for design-build project contracts for bridge structures, the Texas Department of Transportation (TxDOT) may implement a 100-year service life requirement. However, there are no indicated measures or any technical recommendations that provide directions to satisfy the given requirement of service life. In addition, TxDOT ...
  • Process Analysis for Disposal of Surplus Property
    Process Analysis for Disposal of Surplus Property
    Gibson, Bryan ;
    Van Dyke, Christopher
    2019-03-01 | PDF
    The Kentucky Transportation Cabinet (KYTC) frequently acquires property to secure the right of way for transportation projects. Some property may eventually be declared excess and deemed surplus, enabling the Cabinet to dispose of it. Excess property can be declared surplus by an official order of the Secretary or Commissioner of the Department of ...
  • Evaluation and Enhancement of MassDOT Traveler Information Programs
    Evaluation and Enhancement of MassDOT Traveler Information Programs
    Stamatiadis, Polichronis ;
    Gartner, Nathan H.
    2019-03-01 | PDF
    The objective of this study is to develop a proposed structure of various transportation modal information platforms that could be integrated and supported by the latest traveler information technologies. MassDOT’s current traveler information program is provided through multiple outlets and platforms targeted to specific customer service groups wh ...
  • GDOT Noise Analysis Procedures
    GDOT Noise Analysis Procedures
    Funk, R.
    2019-03-01 | PDF
    The primary objective of this project was the development of a Noise Analysis Procedures manual for Georgia Department of Transportation (GDOT) incorporating best practices from Federal Highway Administration (FHWA) and other states while addressing any GDOT specific procedures. The project consisted of three tasks – 1) Review of other state noise ...
  • Reassessing Child Pedestrian Mode Choice and Safety via Perceived Parental Risk Research Brief
    Reassessing Child Pedestrian Mode Choice and Safety via Perceived Parental Risk [Research Brief]
    Marshall, Wesley E. ;
    Janson, Bruce N.
    2019-03-01 | PDF
    Traditional pedestrian/bicyclist safety analyses typically examine crashes, injuries, or fatalities. This reactive approach only accounts for the places where people are currently walking/biking and those that are doing so. Would a proactive approach–examining areas where pedestrian/bicyclist activity is being suppressed because of safety concerns– ...
  • Application of Microbial Induced Calcite Precipitation to Stabilize Florida HighOrganic Matter Soils for Roadway Construction
    Application of Microbial Induced Calcite Precipitation to Stabilize Florida High-Organic Matter Soils for Roadway Construction
    Crowley, Raphael ;
    Zimmerman, Andrew
    2019-03-01 | PDF
    Microbially induced calcite precipitation (MICP) was used to treat Ottawa 50-70 sand and organic soil (from Polk County, FL, with 50% organic content) in the lab via injection at the bottom of specimens. Results showed that the technique was effective in sands, although calcification was variable and not uniform over the height of each specimen, wh ...
  • Implementation of Proactive Traffic Signal Control System at Multiple Intersections at the Greater Houston Area Final Report
    Implementation of Proactive Traffic Signal Control System at Multiple Intersections at the Greater Houston Area: Final Report
    Wu, Xing ;
    Yang, Hao
    2019-03-01 | PDF
    This report summarizes the findings from implementing the proactive signal control system at 30 intersections at four testbeds in the Houston metropolitan area. The work started in April 2017 and the final installation was on December 17, 2018. The final data set was received on January 24, 2019. The data were used evaluate the performance of the i ...
  • Surveying NonMotorized Travel Behavior at Grade Rail Crossings
    Surveying Non-Motorized Travel Behavior at Grade Rail Crossings
    Burbidge, Shaunna K.
    2019-03-01 | PDF
    Train-pedestrian collisions have been shown to be the leading cause of fatality in train-related accidents worldwide, yet there is remarkably little research examining non-motorist travel behavior at grade crossings. This report aims to determine how non-motorists behave and interact near at-grade rail crossings, including their level of compliance ...
  • Development of a Test Method for Assessing the Performance of Vehicular Traffic Signal Assemblies during Hurricane Force Winds
    Development of a Test Method for Assessing the Performance of Vehicular Traffic Signal Assemblies during Hurricane Force Winds
    Zisis, Ioannis ;
    Irwin, Peter
    2019-03-01 | PDF
    The performance of span-wire mounted traffic signals during past hurricane seasons indicated to FDOT the need to explore new methods to improve traffic signal assembly survivability during hurricane force winds. FDOT and FIU embarked on a collaborative research program to study the performance of spanwire traffic signal systems subjected to extreme ...
  • Development of Quality Assurance and Quality Control System for PostTensioned Segmental Bridges in Florida Case of Ringling Bridge Phase II Summary
    Development of Quality Assurance and Quality Control System for Post-Tensioned Segmental Bridges in Florida: Case of Ringling Bridge – Phase II [Summary]
    Azizinamini, Atorod
    2019-03-01 | PDF
    Following an in-depth evaluation of nondestructive testing (NDT) techniques, Florida International University researchers supported and documented the efforts of two companies selected to test the integrity of external post-tensioning cables on the bridge by nondestructive methods.
  • Impacts of Ridesourcing on VMT Parking Demand Transportation Equity and Travel Behavior
    Impacts of Ridesourcing on VMT, Parking Demand, Transportation Equity, and Travel Behavior
    Henao, Alejandro ;
    Marshall, Wesley E.
    2019-03-01 | PDF
    Ride-haling such as Uber and Lyft are changing the ways people travel and is critical to forecasting mode choice demands and providing adequate infrastructure. Despite widespread claims that these services help reduce driving and the need for parking, there is little research on these topics. This research project uses ethnographic methods – comple ...
  • Traffic Flow Improvements Quantifying the Influential Regions and LongTerm Benefits
    Traffic Flow Improvements: Quantifying the Influential Regions and Long-Term Benefits
    Xie, Yuanchang ;
    Chen, Danjue
    2019-03-01 | PDF
    This research is to conduct a synthesis study on the full-scale effects of Traffic Flow Improvements (TFI) strategies in terms of the influential region and the changes of gains over time. The ultimate goal is to inform MassDOT’s evaluation of Congestion Mitigation and Air Quality (CMAQ) projects and their demonstrated benefits to relieve congestio ...
  • Historic Context and Handbook for the Identification and Evaluation of Georgias Burial Grounds
    Historic Context and Handbook for the Identification and Evaluation of Georgia’s Burial Grounds
    Coco, Julie ;
    Reed, Mary Beth
    2019-03-01 | PDF
    Although we choose to mourn our dead in differing manners, all human cultures share a desire to handle death and the bodies of those who have died in what they consider to be a respectful, culturally appropriate, manner. Many factors influence these choices, such as religion, politics, environment, history, and ethnicity. Each choice has the potent ...
  • Assessment of the Performance of Vehicular Traffic Signal Assemblies during Hurricane Force Winds
    Assessment of the Performance of Vehicular Traffic Signal Assemblies during Hurricane Force Winds
    Zisis, Ioannis ;
    Irwin, Peter
    2019-03-01 | PDF
    The performance of span-wire mounted traffic signals during past hurricane seasons indicated to FDOT the need to explore new methods to improve traffic signal assembly survivability during hurricane force winds. FDOT and FIU embarked on a collaborative research program to study the performance of span-wire traffic signal systems subjected to extrem ...
  • Impacts of Ridesourcing on VMT Parking Demand Transportation Equity and Travel Behavior Research Brief
    Impacts of Ridesourcing on VMT, Parking Demand, Transportation Equity, and Travel Behavior [Research Brief]
    Marshall, Wesley E. ;
    Janson, Bruce N.
    2019-03-01 | PDF
    Ride-hailing is changing how people travel. Despite assumptions that these services help our transportation system, there is little research on this topic. This report analyzes basic impacts of ridehailing on transportation efficiency in terms of deadheading, vehicle occupancy, mode replacement, vehicle miles traveled, parking, and driver earnings.
  • HR Data Tool HRDT A Modular System for Supporting GDOT Human Resource Planning and Decision Making
    HR Data Tool (HRDT): A Modular System for Supporting GDOT Human Resource Planning and Decision Making
    Frost, J. David
    2019-03-01 | PDF
    This report presents the concepts and framework behind Human Resources Data Tool (HRDT), a Java-based software package developed specifically for the Georgia Department of Transportation (GDOT) to aid in analysis of Human Resources (HR) data and for use in planning and decision making. This project is built upon the previous JOB SEEKER (Job Shadowi ...
  • Feasibility of Estimating Commodity Flows on Highways with Existing and Emerging Technologies
    Feasibility of Estimating Commodity Flows on Highways with Existing and Emerging Technologies
    Cetin, Mecit ;
    Sahin, Olcay
    2019-03-01 | PDF
    Understanding the types and volumes of different commodities being hauled over the roadway network is important for freight demand modeling and planning. Categorizing trucks or trailers into subclasses (e.g., container, dry van, refrigerated vans, tank, and car transporter) will help narrow down the type of commodity that is being carried. For exam ...
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