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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 6981 - 7000 of 36104 results
  • Setting Appropriate BenefitCondition Jumps for Pavement Treatments in PMS
    Setting Appropriate Benefit/Condition Jumps for Pavement Treatments in PMS
    Chen, Don ;
    Hildreth, John
    2018-04-01 | PDF
    This research was conducted to determine pavement performance jumps after treatment, which are defined as the difference between pre-treatment and post-treatment Pavement Condition Rating (PCR) values. The North Carolina Department of Transportation (NCDOT) resets the PCR of sections to its highest value of 100 after a treatment is applied. However ...
  • Measure of Truck Delay and Reliability at the Corridor Level
    Measure of Truck Delay and Reliability at the Corridor Level
    Liao, Chen-Fu
    2018-04-01 | PDF
    Freight transportation provides a significant contribution to our nation’s economy. A reliable and accessible freight network enables business in the Twin Cities to be more competitive in the Upper Midwest region. Accurate and reliable freight data on freight activity is essential for freight planning, forecasting and decision making on infrastruct ...
  • Connected VehicleEnabled Weather Responsive Traffic Management The Next Generation of Weather Responsive Traffic Management
    Connected Vehicle-Enabled Weather Responsive Traffic Management: The Next Generation of Weather Responsive Traffic Management
    Alfelor, Roemer
    2018-04-01 | PDF
    Weather Responsive Traffic Management (WRTM) is a key initiative under the FHWA’s Road Weather Management Program (RWMP). The WRTM initiative supports transportation agencies and professionals in developing better advisory, control, and treatment strategies that mitigate mobility and safety challenges due to adverse weather. It has enabled innovati ...
  • Strategic Decision Support for Airport Capacity Planning An Application of Discrete Event Simulation in a Staged Queueing Framework for Airside Operations
    Strategic Decision Support for Airport Capacity Planning : An Application of Discrete Event Simulation in a Staged Queueing Framework for Airside Operations
    Smith, L. D. ;
    Zhang, Juan
    2018-04-01 | PDF
    Airside performance at major airports is affected by a large number of interacting factors in three major spheres of airside activity: (1) airport operations control (AOC), (2) maintenance services, and (3) air traffic control (ATC). AOC is responsible for assignment of preferred parking sections (with associated terminal gates). It is also respons ...
  • Precast Prestressed Concrete Bent Caps Volume 1 Preliminary Design Considerations and Experimental Test Program
    Precast, Prestressed Concrete Bent Caps : Volume 1, Preliminary Design Considerations and Experimental Test Program
    Birely, Anna C. ;
    Mander, John B.
    2018-04-01 | PDF
    Precast prestressed concrete bent caps may provide significant benefits by enabling accelerated construction of bridge substructures and improve longevity by reducing the propensity for cracking. The Texas Department of Transportation enables the use of precast reinforced concrete (RC) bent caps through standard connection details that allow contra ...
  • Annual Report for Calendar Year 2016 New England Transportation Consortium
    Annual Report for Calendar Year 2016: New England Transportation Consortium
    New England Transportation Consortium
    2018-04-01 | PDF
    The New England Transportation Consortium (NETC) is a cooperative effort of the transportation agencies of the six New England States, the six New England state land grant universities, and the Federal Highway Administration (FHWA). Through the Consortium, the states pool professional, academic, and financial resources for transportation research l ...
  • PTC Test Facility Assessment and Laboratory Development Phase I
    PTC Test Facility Assessment and Laboratory Development : Phase I
    Brosseau, Joe ;
    Polivka, Alan
    2018-04-01 | PDF
    From May 1, 2016, through August 31, 2016, the Transportation Technology Center (TTC) assessed Class I Positive Train Control (PTC) test facilities, and held discussions with commuter and short line railroad representatives to recommend a project approach to implement an industry test laboratory for Interoperable Train Control (ITC) at TTC.
  • Feasibility of Granular Road and Shoulder Recycling
    Feasibility of Granular Road and Shoulder Recycling
    Li, Cheng ;
    Ashlock, Jeremy
    2018-04-01 | PDF
    Granular-surfaced roads and shoulders frequently experience extensive surface damage caused by heavy agricultural traffic loads, freeze-thaw cycles, and wet-dry cycles, which increases maintenance requirements and reduces safety. The goal of this study was to cost-effectively recycle existing degraded granular surface materials while improving them ...
  • Design and Performance of CostEffective Ultra High Performance Concrete for Bridge Deck Overlays
    Design and Performance of Cost-Effective Ultra High Performance Concrete for Bridge Deck Overlays
    Khayat, Kamal H. ;
    Valipour, Mahdi
    2018-04-01 | PDF
    The main objective of this research was to develop a cost-effective ultra-high performance concrete (UHPC) for bonded bridge deck overlays. The high durability and mechanical properties of such repair material can offer shorter traffic closures and prolong the service life of the bridge deck. The UHPC was optimized using supplementary cementitious ...
  • Research Library Operations Calendar Year 2016
    Research Library Operations – Calendar Year 2016
    Paszamant, Carol B
    ORCID ICON IMG
    2018-04-01 | PDF
    The NJDOT Research Library operates as a branch of the New Jersey State Library and is funded by the FHWA State Planning and Research Program as a research project. The library serves NJDOT employees; New Jersey state government employees; other libraries, organizations, and businesses; and members of the general public. Two certified professional ...
  • Orange Work Zone Pavement Marking Midwest Field Test
    Orange Work Zone Pavement Marking Midwest Field Test
    Shaw, John W ;
    Chitturi, Madhav V.
    2018-04-01 | PDF
    Roadway lanes are often repositioned to accommodate highway work operations, resulting in a need to alter pavement markings. Even the most effective methods for removing old pavement markings sometimes leave “ghost” markings at the old lane line locations. The ghosts can be quite conspicuous under certain lighting conditions and viewing angles. To ...
  • Development of Pavement Performance Prediction Models for Preservation Treatments Volume 2
    Development of Pavement Performance Prediction Models for Preservation Treatments : Volume 2
    Ozer, Hasan ;
    Ziyadi, Mojtaba
    2018-04-01 | PDF
    The implementation of a pavement preservation program was initiated in Fiscal Year (FY) 2005 at the Illinois Department of Transportation (IDOT) by appropriating funding for four specific pavement preservation treatments. The types of treatments included micro-surfacing, slurry seals, cape seal, and bituminous surface treatments (also known as chip ...
  • Incorporating Transit Service Decisions into Express Lane Programs
    Incorporating Transit Service Decisions into Express Lane Programs
    Jin, Xia ;
    Asgari, Hamidreza
    2018-04-01 | PDF
    Considering the significant benefits that transit service could bring in contributing to the overall project goals in reducing congestion, enhancing system performance, and improving environmental, economic and social concerns, this project aims to provide a standard approach that enables the incorporation of transit service goals and benefit consi ...
    Supporting Files
  • Rock Excavation Best Management Practice Phase I Rock Cut Perimeter Blasting BMP
    Rock Excavation Best Management Practice Phase I (Rock Cut Perimeter Blasting BMP)
    Petr, Vilem ;
    Lozano, Eduardo
    2018-04-01 | PDF
    We examined CDOT design procedures, blasting methods, blast calculations, and aesthetic considerations to specify best management practices for highway rock cut operations for the Colorado Department of Transportation (CDOT) that could be followed when a Contractor or Permittee is proposing to blast. Though aesthetics are highly subjective, we deve ...
  • DEVELOPING A METHOD TO IDENTIFY HORIZONTAL CURVE SEGMENTS WITH HIGH CRASH OCCURRENCES USING THE HAF ALGORITHM
    DEVELOPING A METHOD TO IDENTIFY HORIZONTAL CURVE SEGMENTS WITH HIGH CRASH OCCURRENCES USING THE HAF ALGORITHM
    Saito, Mitsuru ;
    Browning, Joseph
    2018-04-01 | PDF
    Crashes occur every day on Utah’s highways. Curves can be particularly dangerous as they require driver focus due to potentially unseen hazards. Often, crashes occur on curves due to poor curve geometry, a lack of warning signs, or poor surface conditions. This can create conditions in which vehicles are more prone to leave the roadway, and possibl ...
  • Influence of Internal Curing on Measured Resistivity Research Project Capsule 186C
    Influence of Internal Curing on Measured Resistivity : Research Project Capsule [18-6C]
    Rupnow, Tyson
    ORCID ICON IMG
    2018-04-01 | PDF
    The Louisiana Department of Transportation and Development (DOTD) has required surface resistivity measurements for structural concrete applications since 2013. The 2016 Standard Specifications for Roads and Bridges includes this requirement. DOTD has investigated the use of saturated lightweight fi ne aggregate as an internal curing agent for stru ...
  • Revised Condition Rating Survey Models to Reflect All Distresses Volume 1
    Revised Condition Rating Survey Models to Reflect All Distresses : Volume 1
    Ozer, Hasan ;
    Ziyadi, Mojtaba
    2018-04-01 | PDF
    Pavement condition assessment plays a key role in infrastructure programming and planning processes. Similar to other state agencies, the Illinois Department of Transportation (IDOT) has been using a system to evaluate the condition of pavements since 1974. Since 1994–1995, IDOT has been using a system to project future pavement performance as well ...
  • Improved Methodology for Benefit Estimation of Preservation Projects
    Improved Methodology for Benefit Estimation of Preservation Projects
    Jessup, Eric L., 1966- ;
    Zhou, You
    2018-04-01 | PDF
    This research report presents an improved process for evaluating the benefits and economic tradeoffs associated with a variety of highway preservation projects. It includes a summary of results from a comprehensive phone survey concerning the use and application of the software developed by the Federal Highway Administration (FHWA), known as the Hi ...
  • Measuring LeftBehinds on Subway
    Measuring Left-Behinds on Subway
    Gonzales, Eric J. ;
    Keklikoglou, Andronikos
    2018-04-01 | PDF
    The Massachusetts Bay Transportation Authority (MBTA) uses performance measures to monitor its service and measure improvement. This project supports the development of measures that track the customer experience instead of the performance of vehicles. Current measures are based on fare card records and assume that passengers are able to get on the ...
  • STATEWIDE DATA STANDARDS TO SUPPORT CURRENT AND FUTURE STRATEGIC PUBLIC TRANSIT INVESTMENT
    STATEWIDE DATA STANDARDS TO SUPPORT CURRENT AND FUTURE STRATEGIC PUBLIC TRANSIT INVESTMENT
    Porter, J. David ;
    Carleton, Phillip
    2018-04-01 | PDF
    Significant progress has been made in recent years in reporting and using public transit service data. With the creation and widespread use of the General Transit Feed Specification (GTFS) data standard, there has been a significant increase in the functionality and enhancements to the utility of transit service data (e.g., GTFS-realtime, Google Ma ...
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