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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 7261 - 7280 of 36114 results
  • Pavement Edge Treatment Final Report
    Pavement Edge Treatment Final Report
    Anderson, Keith W. ;
    Berends, Terry
    2018-01-01 | PDF
    Four projects were built over two construction seasons using special devices attached to the paving machine that produces a 30 degree slope on the outside pavement edge instead of the near vertical drop-off common with conventional paving equipment. This pavement edge treatment allows vehicles that leave the roadway a gentler slope to navigate when ...
  • Risk Assessment of NonMotorized Access to Rail Transit Stations
    Risk Assessment of Non-Motorized Access to Rail Transit Stations
    Burbidge, Shaunna K.
    2018-01-01 | PDF
    Over the past decade, the agency has undertaken multiple efforts to better understand the various components that contribute to safety for vulnerable road users. One major destination type that attracts a large number of pedestrians and cyclists is transit stations. In fact, all transit riders are pedestrians at some point along their journey, maki ...
  • Accelerated Innovation Deployment of Laser Metrology for Steel Bridge Fabrication
    Accelerated Innovation Deployment of Laser Metrology for Steel Bridge Fabrication
    Wierschem, N. E. ;
    Jones, T. W.
    2018-01-01 | PDF
    This report documents the use of a laser metrology technique in the production of splice connection for steel bridge girders which was successfully performed at Hirschfeld Industries steel bridge fabrication plant in Bristol, VA. Over the course of this project, the traditional method of splice connection fabrication was studied and compared alongs ...
  • BinderGrade Bumping and High Binder Content to Improve Performance of RAPRAS Mixtures Final Report SPR 797
    Binder-Grade Bumping and High Binder Content to Improve Performance of RAP-RAS Mixtures : Final Report : SPR 797
    Coleri, Erdem ;
    Haddadi, Sogol Sadat
    2018-01-01 | PDF
    General reduction in pavement program funding levels over the past decade and the possible consequent increase in pavement road roughness within the next couple years created a need for low cost yet effective alternative ways to rehabilitate, preserve and maintain roadway network in Oregon. Recycling highway construction materials and minimizing th ...
  • How Do Stressed Workers Make Travel Mode Choices That Are Good For Their Health Safety and Productivity
    How Do Stressed Workers Make Travel Mode Choices That Are Good For Their Health, Safety and Productivity?
    Yang, Liu-Qin ;
    Wipfli, Brad
    2018-01-01 | PDF
    It is well recognized in transportation and psychology research that commuting stress has consequences for commuters' travel safety, home environment, and work performance. Little research has addressed questions involving the possible interdependence between work stress, family stress, and commuting stress: Do workers having many demands from work ...
  • Developing an Interactive MachineLearningBased Approach for Sidewalk Digitization
    Developing an Interactive Machine-Learning-Based Approach for Sidewalk Digitization
    Luo, Ji ;
    Wu, Guoyuan
    2018-01-01 | PDF
    In urban areas, many socio-economic concerns have been raised regarding fatal collisions, traffic congestion, and deteriorated air quality due to increased travel and logistic demands as well as the existing on-road transportation systems. As one of the promising remedies, active transportation has been advocated, which may not only mitigate conges ...
  • Finding the Value of Urban Parking An Analysis of the Impacts of Smart Parking Systems on Congestion and Land Values in Downtown Houston Final Report
    Finding the Value of Urban Parking : An Analysis of the Impacts of Smart Parking Systems on Congestion and Land Values in Downtown Houston, Final Report
    Huntsman, Brett ;
    Lasley, Phil
    2018-01-01 | PDF
    For this report, researchers have examined smart parking, which is a parking management tool that uses various technologies to aid drivers in efficiently locating and paying for available parking. Smart parking systems allow drivers to know where they will park before reaching their destination, in turn prompting more traffic to have a definitive d ...
  • Vertiports Policy implications
    Vertiports : Policy implications
    Polunsky, Steven
    ORCID ICON IMG
    2018-01-01 | PDF
    According to HeliExperts International, “Heliports/Vertiports are designated helicopter and tiltrotor landing and takeoff areas. They range from simple unprepared open fields and parking lots to locations that support scheduled air services, complete with hangars, fuel and aircraft maintenance capabilities. Over 90% of current facilities are of the ...
  • OneWay Electric Vehicle Carsharing in San Diego An Exploration of Behavioral Impacts and the Impact of Pricing Incentives on Improving Operational Efficiency
    One-Way Electric Vehicle Carsharing in San Diego : An Exploration of Behavioral Impacts and the Impact of Pricing Incentives on Improving Operational Efficiency
    Shaheen, Susan A.
    ORCID ICON IMG
    2018-01-01 | PDF
    This project is a two-year evaluation of pricing/incentives applied to the one-way, all electric carsharing system operated by car2go in San Diego, CA. This system is the only electric vehicle-based, one-way carsharing system with instant access (i.e., accessible without reservation)operating in the U.S. The goal of this project is to work with car ...
  • Evaluating the Effectiveness of Fly Ashes to Mitigate ASR and Using Recycled Concrete Aggregate in New Construction
    Evaluating the Effectiveness of Fly Ashes to Mitigate ASR and Using Recycled Concrete Aggregate in New Construction
    Fiore, Bryce ;
    Hossain, Md Tarik
    2018-01-01 | PDF
    A comprehensive study was performed to evaluate mitigation options to reduce premature expansion due to alkali-silica reaction (ASR) for selected Wyoming aggregates. State-of-the-art and standardized test methods were performed and results were used to compare expansion levels. Four different fly-ash sources were tested. All of the sources mitigate ...
  • Development of InPlace Density Method for Cold InPlace Recycling
    Development of In-Place Density Method for Cold In-Place Recycling
    Sebaaly, Peter E. ;
    Castro, J.
    2018-01-01 | PDF
    This report presents the results of a research study funded by the Nevada DOT and the SOLARIS University Transportation Center. The research developed a method for measuring the in-place density of the cold in-place recycled (CIR) layer immediately after compaction. A laboratory experiment was conducted that measured the density of the compacted CI ...
  • The Emerging Clean Transportation Workforce Opportunities and Recommendations to Support the Growing Alternative Fuels Industry
    The Emerging Clean Transportation Workforce: Opportunities and Recommendations to Support the Growing Alternative Fuels Industry
    Freeman, Gabrielle ;
    McRae, Glenn
    2018-01-01 | PDF
    This paper examines what education and training programs exist today to support the alternative fuels transportation industry, and provides recommendations on further building out a workforce pipeline to meet anticipated growth. Job seekers should read on to discover what training and education opportunities are currently available, while educators ...
  • Calibration and Validation of LargeScale Traffic Simulation Networks A Case Study
    Calibration and Validation of Large-Scale Traffic Simulation Networks: A Case Study
    Bartin, Bekir ;
    Ozbay, Kaan
    2018-01-01 | PDF
    The availability, accuracy and relevance of real world input data are essential for developing a reliable traffic simulation model. Large-scale traffic simulation models, in particular, require data from many sources and in great detail. Though it is now possible to obtain detailed field data with the advent of new technologies such as GPS, cellula ...
  • The Legal Status of Low Speed Electric Automated Vehicles in Texas Policy Brief
    The Legal Status of Low Speed, Electric, Automated Vehicles in Texas : Policy Brief
    Stoeltje, Gretchen ;
    Antonio, Alexander J.
    2018-01-01 | PDF
    This report explores whether vehicles that are both Neighborhood Electric Vehicles (NEVs) and Automated Vehicles (AVs) may operate legally on public roads in Texas. First is an examination of Neighborhood Electric Vehicles and how they are governed in the state of Texas. Next, the report examines the new Texas law governing AVs, Senate Bill 2205 (S ...
  • SustainingandGrowingaResearchProgramDuring TimesofChange
    Sustaining and Growing a Research Program During Times of Change
    North Carolina. Dept. of Transportation
    2018-01-01 | PDF
    The transportation research program at the North Carolina Department of Transportation (NCDOT) hosted a peer exchange to discuss how to sustain and grow a research program during times of change. The NCDOT Research and Development Program planned the sessions pertaining to sustaining and growing a research program during times of change. This repor ...
  • Implementation of Pesticide Applicator Certification Schools and Continuing Education Workshops January 2018
    Implementation of Pesticide Applicator Certification Schools and Continuing Education Workshops [January 2018]
    Martin, Dennis
    2018-01-01 | PDF
    The herbicide applicator training program of the Oklahoma Department of Transportation (ODOT) consists of initial pesticide applicator training schools, certification testing, sprayer calibration workshops and on-going yearly continuing education sessions. Four pesticide applicator certification schools were conducted by Oklahoma State University ( ...
  • A MultiPerspective Study on Safety Performance at the Colorado DOT
    A Multi-Perspective Study on Safety Performance at the Colorado DOT
    Chinowsky, Paul S.
    2018-01-01 | PDF
    This effort focuses on the safety culture within CDOT and the effectiveness of the CDOT safety programs on improving safety culture. The study used a survey approach based on interviews with senior safety officials to determine the scope of the survey questions. The survey was distributed to all five regions and to job classifications that included ...
  • Student Work Safety Guidelines in Roadside Applications and Work Zones Safety Guidelines for Transportation Researchers
    Student Work Safety Guidelines in Roadside Applications and Work Zones : Safety Guidelines for Transportation Researchers
    Gambatese, John A. ;
    Liu, Ding
    2018-01-01 | PDF
    Universities, colleges, and other learning institutions regularly conduct research on behalf of state departments of transportation (DOTs). Much of the research involves data collection and testing work by student researchers on roadways and other types of field sites. The field research may require students to work on the roadway, in the right-of- ...
  • The Use of Freight Advisory Committees in Responding to Freight Supply Chain Disruptions
    The Use of Freight Advisory Committees in Responding to Freight Supply Chain Disruptions
    Abkowitz, Mark ;
    Philip, Craig
    2018-01-01 | PDF
    The objective of this research project was to develop approaches for the Tennessee Department of Transportation (TDOT) to consider that would empower its state and regional freight advisory committees (FACs) to serve as coordinating bodies in the event of disruptions that would have an adverse impact on the supply chains of shippers critical to the ...
  • Impact of SCurves on Speed in a Modern Roundabout
    Impact of S-Curves on Speed in a Modern Roundabout
    Christofa, Eleni ;
    Sabhanayagam, Akshaey
    2018-01-01 | PDF
    According to the United States Department of Transportation (USDOT), around 20 people per day die at signalized intersections, with most of these caused by angle or head-on crashes. The USDOT’s Federal Highway Administration (FHWA) has identified modern roundabouts to be substantially safer than signalized intersections, due in part to the reductio ...
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