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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 6381 - 6400 of 36049 results
  • Develop a Tidewater Goby Survey Method Using Environmental DNA
    Develop a Tidewater Goby Survey Method Using Environmental DNA
    Sutter, Michael ;
    Kinziger, Andrew
    2018-10-08 | PDF
    Rangewide monitoring of fish species is critical for determining status and trends in abundance and distribution; however, implementations of large-scale distribution surveys have generally been constrained by time and cost. This study uses environmental DNA (eDNA) to monitor the presence or absence of two endangered tidewater goby species, the nor ...
  • Technical Memo Hamburg Wheel Tracker Preliminary Data Analysis
    Technical Memo – Hamburg Wheel Tracker Preliminary Data Analysis
    Novak, David C.
    2018-10-08 | PDF
    This memo documents the results of initial data analysis efforts by the UVM research team for pavement testing using the Hamburg Wheel Tracker (HWT) test by the Vermont Agency of Transportation’s Materials Testing & Certification Lab. The ultimate objective of the Hamburg Wheel Tracker project is to develop a method for calculating pay factors for ...
  • Northeast Autonomous and Connected Vehicle Summit Report
    Northeast Autonomous and Connected Vehicle Summit Report
    Jackson, Eric ;
    Simler, Tara
    2018-10-02 | PDF
    The Northeast Autonomous and Connected Vehicle Summit was hosted by the Connecticut Department of Transportation and the Federal Highway Administration on June 12-13, 2018, at the Windsor Hartford Marriott. The event provided an open forum for stakeholders in the Northeast to network, share and discuss a wide range of topics related to the future o ...
  • Updating the Lane Closure Guide for Urban Highways in the Kansas City Metropolitan Area
    Updating the Lane Closure Guide for Urban Highways in the Kansas City Metropolitan Area
    Fitzsimmons, Eric J. ;
    Nye, Benjamin G.
    2018-10-02 | PDF
    Each year short- and long-term work zones are put into place to allow for maintenance and rehabilitation of highways. However, work zones can have a significant impact on traffic flow. To reduce the impacts of work zones, KDOT developed a Lane Closure Guide to recommend times during a day a lane could be shut down for construction. The existing Lan ...
    Supporting Files
  • The Effect of Shadow Evacuation in Megaregion Disasters A Pilot Study
    The Effect of Shadow Evacuation in Megaregion Disasters: A Pilot Study
    Wolshon, Brian ;
    Herrera, Nelida
    2018-10-01 | PDF
    Transportation systems serve important roles during emergencies, in particular for evacuations. However, efficient travel during these life-and-death scenarios can be adversely impacted by external conditions, such as unnecessary and unneeded travel. This research sought to enhance the understanding of the effects of these conditions by analyzing s ...
  • Manual of Best Practices and Techniques for Clearing Intersection Layouts
    Manual of Best Practices and Techniques for Clearing Intersection Layouts
    Qi, Yan ;
    Bergner, Dave
    2018-10-01 | PDF
    The purpose of this manual is to present best practices and techniques for snow plowing various intersection layouts in a format that is easy to use and access. While it is understood that different agencies have different vehicles and equipment and their experience of clearing certain type of layout varies, this compilation represents the best pra ...
  • StreamStats for South Carolina A Multipurpose WaterResources Web Application
    StreamStats for South Carolina: A Multipurpose Water-Resources Web Application
    Feaster, Toby D. ;
    Clark, Jimmy M
    2018-10-01 | PDF
    The U.S. Geological Survey (USGS) developed the South Carolina StreamStats application in cooperation with the South Carolina Department of Transportation. StreamStats (https://water.usgs.gov/osw/streamstats/) is a map-based web application that provides analytical tools useful for water-resources planning and management and many engineering purpos ...
  • A Decisionmaking Tool for Incorporating CradletoGate Sustainability Measures into Pavement Design
    A Decision-making Tool for Incorporating Cradle-to-Gate Sustainability Measures into Pavement Design
    Hassan, Marwa ;
    Subedi, Sujata
    2018-10-01 | PDF
    The objective of this study was to conceive and develop a decision-making tool for evaluating the sustainability of pavement designs and products, based on a cradle-to-gate analysis (where gate is defined as the gate of the construction job site). This tool is based on Environmental Product Declarations (EPD) in order to enhance the reliability and ...
  • Connected Marysville Pilot Analysis Phase 1 Final Report
    Connected Marysville Pilot Analysis – Phase 1 Final Report
    Timcho, Thomas ;
    Byington, Cynthia
    2018-10-01 | PDF
    This report summarizes the outcomes of phase 1 of the Connected Marysville Pilot Analysis project and includes a deployment plan, technology summary, design of experiment and recruitment plan. It is expected to serve as the foundation for the next phase of the project, the recruitment and deployment of connected vehicle technology in 400 private ci ...
  • Free Energy Solar Highway Program
    Free Energy Solar Highway Program
    Hirsch, Arthur H. ;
    Overdevest, Justin
    2018-10-01 | PDF
    Highway rights-of-way (ROW) can host alternative energy generation system resources for many state departments of transportation (DOTs). In an era of limited state DOT budgets, ROW areas can be a source of income and cost reduction to DOTs through alternative energy development, especially in the area of solar energy. In addition, generating power ...
  • Economic and Safety Considerations Motor Vehicle Safety Inspections for Passenger Vehicles in Texas
    Economic and Safety Considerations: Motor Vehicle Safety Inspections for Passenger Vehicles in Texas
    Murphy, Mike ;
    Jiang, Nan
    2018-10-01 | PDF
    The objective of this study was to meet legislative needs inquiring about the efficiency and necessity of titling and inspection of vehicles in the state of Texas. This was accomplished through three tasks: quantifying the efficiency of the vehicle inspection program; assessing the safety impact of eliminating the inspection program; and making rec ...
  • Evaluation of Soil Water Characteristic Curves SWCC in Pavement ME for Nevadas Unbound Materials
    Evaluation of Soil Water Characteristic Curves (SWCC) in Pavement ME for Nevada’s Unbound Materials
    Hajj, Elie Y ;
    Stolte, Sarah
    2018-10-01 | PDF
    The American Association of State Highway and Transportation Officials (AASHTO) adopted the Mechanistic-Empirical Pavement Design Guide (MEPDG) as an interim pavement design standard in 2008. In 2015, the Nevada Department of Transportation (NDOT) implemented the MEPDG for the structural design of new and rehabilitated flexible pavements. Resilient ...
  • Design and Performance of Highly Skewed Deck Girder Bridges Research Brief
    Design and Performance of Highly Skewed Deck Girder Bridges [Research Brief]
    Wisconsin. Department of Transportation
    2018-10-01 | PDF
    Bridge skew is the angle between a line perpendicular to a superstructure and its supports. Highly skewed bridges are more complex and pose more challenges than bridges that pass perpendicularly over the road or other features below it. Skew alters distribution of loads from deck to girders. It can cause large deformations at girder ends or create ...
  • Plasticity Requirements of Aggregates Used in Pavement Base and Subbase Courses
    Plasticity Requirements of Aggregates Used in Pavement Base and Subbase Courses
    Osouli, Abdolrzea ;
    Tutumluer, Erol
    2018-10-01 | PDF
    In pavement unbound aggregate layers, fines content (passing No. 200 sieve size or finer than 0.075 mm) characteristics influence the aggregate matrix strength and the modulus and deformation behavior. A laboratory investigation was conducted to identify the effects of fines content, plasticity index, dust ratio (percent passing No. 200 to No. 40 s ...
  • Minimizing Shrinkage Cracking in CementStabilized Bases through MicroCracking
    Minimizing Shrinkage Cracking in Cement-Stabilized Bases through Micro-Cracking
    Wu, Zhong ;
    Liu, Yilong
    2018-10-01 | PDF
    Cement stabilized soil base (so-called soil cement base) has been used in flexible pavement in Louisiana for more than 50 years. Soil cement has an excellent load carrying capacity and durability but is also well-known for developing shrinkage cracks, which can reflect through asphalt concrete surfaces and accelerate the deterioration of asphalt pa ...
  • Channel Usage Research and Analysis Phase 3
    Channel Usage Research and Analysis – Phase 3
    ten Siethoff, Brian ;
    Titze, Christopher
    2018-10-01 | PDF
    In 2014 Cambridge Systematics, Inc. and Greenman-Pedersen, Inc. (the “research team”) undertook research on alternative methodologies to count and classify vessels on New Jersey’s Marine Transportation System. During the late summer of 2017, the research team undertook a third phase of data collection with a goal of continuing to test field data co ...
  • Comparative Nitrogen and Pesticide Removal With Sorption Media in Linear Ditch for Groundwater and Stormwater Treatment
    Comparative Nitrogen and Pesticide Removal With Sorption Media in Linear Ditch for Groundwater and Stormwater Treatment
    Wanielista, Marty ;
    Chang, Ni-Bin
    2018-10-01 | PDF
    The abundant rain in Florida can produce significant runoff from urban and agricultural areas that can carry pollutants and fertilizers into water bodies and groundwater. This runoff is generally high in nitrogen, which then leads to an overabundance of nitrogen in groundwater. Roadside ditches and storm drains are a major conduit or runoff and a m ...
  • Health Perception on the Adoption and Acceptance of Shared Mobility From Now to Future or A Statistical Analysis of Bikesharing Usage and Its Potential as an AutoTrip Substitute
    Health Perception on the Adoption and Acceptance of Shared Mobility: From Now to Future; or, A Statistical Analysis of Bikesharing Usage and Its Potential as an Auto-Trip Substitute
    Barbour, Natalia ;
    Zhang, Yu
    2018-10-01 | PDF
    Bikesharing has become increasingly popular in urban areas as an alternative active transportation mode that can help relieve congestion, mitigate negative environmental impacts, and improve public health through increased physical activity. To understand the benefit of bikesharing, it is important to identify the factors influencing how often regi ...
  • Ramp Metering Impact Study with Potential Regional Deployment within the DallasFort Worth Ozone Nonattainment Area Project Summary
    Ramp Metering Impact Study with Potential Regional Deployment within the Dallas-Fort Worth Ozone Nonattainment Area [Project Summary]
    Glancy, Chris ;
    Chaudhary, Nadeem A
    2018-10-01 | PDF
    There is an increasing interest by public officials in the use of ramp metering for congestion mitigation at various freeway locations in the Dallas-Fort Worth (DFW) metroplex. DFW is currently in nonattainment for ground-level ozone, and transportation improvements in the area are subject to the transportation conformity process. The Texas Departm ...
  • A New Vehicle Concept To Provide Better Rapid Transit At Reduced Cost Phase 1
    A New Vehicle Concept To Provide Better Rapid Transit At Reduced Cost (Phase 1)
    Yang, Jidong ;
    Wang, Ying
    2018-10-01 | PDF
    A bus rapid transit (BRT) system is a mass transit system that uses rubber-tired vehicles operating in dedicated guideways, high-occupancy vehicle lanes, and/or mixed traffic. These systems typically also have a limited number of stops and use signal priority queue jumper lanes in order to increase operational efficiency and reliability. However, a ...
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