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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 5641 - 5660 of 36054 results
  • Evaluation of FC5 with PG 7622 HP to Reduce Raveling Brief
    Evaluation of FC-5 with PG 76-22 HP to Reduce Raveling [Brief]
    Arambula-Mercado, Edith
    ORCID ICON IMG
    2019-06-01 | PDF
    Road resurfacing involves removing the road’s worn and possibly damaged top layer and replacing it with fresh asphalt. This top layer is the friction course, and its composition has important effects on roadway performance. An open-graded friction course (OGFC) improves traction because it has been formulated and placed with a certain amount of voi ...
  • Planning in Gateway and Natural Amenity Region Communities Understanding the Unique Challenges Associated with Transportation Mobility and Livability
    Planning in Gateway and Natural Amenity Region Communities: Understanding the Unique Challenges Associated with Transportation, Mobility, and Livability
    Rumore, Danya Lee ;
    Stoker, Philip
    2019-06-01 | PDF
    Communities outside of major public lands and other natural amenities throughout the western United States face a variety of transportation and planning-related concerns associated with rapid growth and increases in tourism. Surprisingly, while the unique transportation and planning-related challenges of these western gateway and amenity region (GN ...
  • Best Practices for Pavement Restoration of Open Cut Utility InstallationsRepairs on Local Roadways in Ohio Summary
    Best Practices for Pavement Restoration of Open Cut Utility Installations/Repairs on Local Roadways in Ohio [Summary]
    Robbins, Mary ;
    Green, Roger
    2019-06-01 | PDF
    There are an estimated 3.6 million road opening permits issued nationwide each year (Jarnecke and Pollock, 2017). While advanced planning and coordination with other planned roadway work can reduce impacts, open utility cuts are often unavoidable. As a result, local public agencies face the challenge of ensuring pavements are repaired properly afte ...
  • Evaluating AllWeather Pavement Markings in Illinois Volume 2
    Evaluating All-Weather Pavement Markings in Illinois: Volume 2
    Hawkins, Neal R. ;
    Smadi, Omar G.
    2019-06-01 | PDF
    The project evaluated two pre-manufactured pavement marking tapes (380AW and XRP-R) over three winter seasons at two different Illinois DOT locations (central and southern Illinois). The two products were installed on I-80 within a recessed groove in contrast to IL-3 where they were rolled in with the last pass of the asphalt finishing machine. Ret ...
  • Analysis of Disengagements in SemiAutonomous Vehicles Drivers Takeover Performance and Operational Implications
    Analysis of Disengagements in Semi-Autonomous Vehicles: Drivers' Takeover Performance and Operational Implications
    Favaro, Francesca ;
    Eurich, Sky
    2019-06-01 | PDF
    This report analyzes the reactions of human drivers placed in simulated Autonomous Technology disengagement scenarios. The study was executed in a human-in-the-loop setting, within a high-fidelity integrated car simulator capable of handling both manual and autonomous driving. A population of 40 individuals was tested, with metrics for control take ...
  • NonCementitious Repair Materials Study
    Non-Cementitious Repair Materials Study
    Ram, Prashant V ;
    Smith, Kurt D.
    2019-06-01 | PDF
    The Wisconsin Department of Transportation (WisDOT) is continually looking for state-of the-art technologies, materials, and methodologies to cost-effectively preserve the condition of their pavements so as to extend the service life and delay the need for major rehabilitation or reconstruction. In a search for a more durable and sustainable concre ...
  • ETicketing and Advanced Technologies for Efficient Construction Inspections
    E-Ticketing and Advanced Technologies for Efficient Construction Inspections
    Sturgill, Roy E. ;
    Dadi, Gabriel B.
    2019-06-01 | PDF
    The Kentucky Transportation Cabinet (KYTC), like many state transportation agencies, has seen demand for high-quality infrastructure skyrocket even as it endures reductions in staff numbers. To mitigate the effects of declining staff and bolster construction efficiency, the Cabinet has experimented with a variety of e-construction technologies, the ...
  • Traffic Control Device Analysis Testing and Evaluation Program FY2018 Activities
    Traffic Control Device Analysis, Testing, and Evaluation Program: FY2018 Activities
    Finley, Melisa D. ;
    Pike, Adam M.
    2019-06-01 | PDF
    This project provides the Texas Department of Transportation with a mechanism to conduct high-priority, limited-scope evaluations of traffic control devices. Work conducted during the 2018 fiscal year included: 1) evaluation of the safety of wet-weather pavement markings; 2) identification of effective work zone; pavement marking removal techniques ...
  • What Do Americans Think About Federal Tax Options to Support Transportation Results from Year Ten of a National Survey
    What Do Americans Think About Federal Tax Options to Support Transportation? Results from Year Ten of a National Survey
    Agrawal, Asha Weinstein ;
    Nixon, Hilary
    2019-06-01 | What Do Americans Think About Federal Tax Options to Support Transportation? | PDF
    This report summarizes the results from the tenth year of a national public opinion survey asking U.S. adults questions related to their views on federal transportation taxes. A nationally representative sample of 2,723 respondents completed the online survey. The questions test public opinions about both raising the federal gas tax rate and replac ...
  • Key Information for Cannabis and DUIC Policy
    Key Information for Cannabis and DUIC Policy
    Ward, Nicholas J. ;
    Otto, Jay
    2019-06-01 | PDF
    There is growing concern about driving under the influence of cannabis (DUIC), especially as more states consider changing laws to legalize cannabis. A key question regarding the legalization of cannabis for recreational or medical purposes is its potential impact on public health issues such as traffic safety. To address the needs of traffic safet ...
    Supporting Files
  • Streamlining Implementation of Sustainable Channel Maintenance Practices
    Streamlining Implementation of Sustainable Channel Maintenance Practices
    Witter, Jonathan D ;
    Mecklenburg, Daniel
    2019-06-01 | PDF
    Projects were implemented at seven sites to determine if implementation of natural channel design-based maintenance practices could be streamlined when completed with state sources of funding. Projects that could be completed under Section 404 general permits without project-specific authorization from the ACOE (e.g., non-notifying) were identified ...
  • LTBP News Summer 2019
    LTBP News: Summer 2019
    United States. Federal Highway Administration
    2019-06-01 | PDF
    The Federal Highway Administration's Long-Term Bridge Performance (LTBP) program issues a quarterly newsletter to inform you about the progress and activities of the program. Brief updates on progress in important program activities are provided, including data collection, data releases, new products and publications, and data analysis.
  • Evaluation of the Terminal Boulevard SR 406 Concrete Rubblization Project
    Evaluation of the Terminal Boulevard (SR 406) Concrete Rubblization Project
    Nair, Harikrishnan ;
    Diefenderfer, Brian K
    2019-06-01 | PDF
    In 2016, the Virginia Department of Transportation (VDOT) executed a contract to reconstruct portions of Terminal Boulevard (SR 406) in Norfolk. The work consisted of rubblizing the existing continuously reinforced concrete pavement and placing 6 in. of asphalt mixture on top of the compacted rubblized concrete material. The project limits were fro ...
  • Application of Microbial Induced Calcite Precipitation to Stabilize Florida HighOrganic Matter Soils for Roadway Construction Research Brief
    Application of Microbial Induced Calcite Precipitation to Stabilize Florida High-Organic Matter Soils for Roadway Construction [Research Brief]
    Crowley, Raphael ;
    Zimmerman, Andrew
    2019-06-01 | PDF
    Florida is well known for its lush greenery. This abundant plant life results in soils that are rich in organic matter. That’s good in a garden, but not as good for carrying roads. Decay of organic material in soils makes the soils more compressible and, thus, poorer as foundations for structures like roads. The decomposition of the organic matter ...
  • Management Considerations for Historic Roads in Virginia
    Management Considerations for Historic Roads in Virginia
    Miller, Ann B.
    2019-06-01 | PDF
    Virginia Historic roads—those eligible for or listed on the National Register of Historic Places—may require special planning, design, and management considerations so as to avoid negative effects on their significant elements. This study identified various issues that can affect historic roads. Drawing on this information, the study identified app ...
  • The Incorporation of Wildlife Crossing Structures into TxDOTs Projects and Operations White Paper
    The Incorporation of Wildlife Crossing Structures into TxDOT’s Projects and Operations: White Paper
    Jiang, Nan ;
    Cramer, Patricia C.
    2019-06-01 | PDF
    Each year an average of 7,585 crashes that involve either wild or domestic animals are reported to the Texas Department of Transportation (TxDOT) (TxDOT crash data, 2010–2017). From 2010 to 2017, 160 people lost their lives in these crashes and hundreds more sustained injuries. To reduce these collisions, and make Texas roads safer for the travelin ...
  • Quantifying Traffic CongestionInduced Change of NearRoad Air Pollutant Concentration
    Quantifying Traffic Congestion‐Induced Change of Near‐Road Air Pollutant Concentration
    Luo, Ji ;
    Moretti, Ayla
    2019-06-01 | PDF
    The objective of this study was to examine the relationship between air quality and traffic and weather parameters. With air quality measurements spanning over 11 months, the authors attempted to gain better understanding of the near-freeway air pollutant concentration, traffic speed, traffic flow, and weather parameters. The authors applied both m ...
  • Experimental Investigation of Longitudinal Closure Joint Using 90 Hooked Bars in Accelerated Bridge Construction
    Experimental Investigation of Longitudinal Closure Joint Using 90° Hooked Bars in Accelerated Bridge Construction
    Jahromi, Azadeh Jaberi ;
    Azizinamini, Atorod
    2019-06-01 | PDF
    Several alternatives are used to connect prefabricated bridge deck elements using closure joints but cost and construction considerations limit their use in field applications. In this research, a new detail is proposed to efficiently connect these elements in closure joints. The new detail consists of 90° hooked reinforcement and normal strength c ...
  • Redefining Construction AsBuilt Plans to Meet Current Kentucky Transportation Cabinet Needs
    Redefining Construction As-Built Plans to Meet Current Kentucky Transportation Cabinet Needs
    Lasley, Victoria ;
    Waddle, Steven
    2019-06-01 | PDF
    As-built plans have traditionally been used by construction industry practitioners to record changes made during construction. As-builts provide valuable information for new design projects as well as rehabilitation and remediation projects. The completeness and accuracy of these plans are essential for transportation industries and their success. ...
  • Study and Evaluation of Material Response in Hot Mix Asphalt based on Field Instrumentation Phase II
    Study and Evaluation of Material Response in Hot Mix Asphalt based on Field Instrumentation (Phase II)
    Tarefder, Rafiqul A. ;
    Khan, Zafrul
    2019-06-01 | PDF
    This report presents the results of a research study conducted to observe the variations in mechanistic responses, e.g. stress-strain, of a flexible pavement through embedded sensors. The research program was divided into two phases. During the first phase, an instrumentation section was constructed at I-40 near Albuquerque, New Mexico with an arra ...
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