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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 6961 - 6980 of 36104 results
  • Effect of Warm Mix Asphalt WMA Low Mixing and Compaction Temperatures on Recycled Asphalt Pavement RAP Binder Replacement
    Effect of Warm Mix Asphalt (WMA) Low Mixing and Compaction Temperatures on Recycled Asphalt Pavement (RAP) Binder Replacement
    Faheem, Ahmed ;
    Abboud, Bechara
    2018-04-06 | PDF
    The use of Warm Mix Asphalt (WMA) technologies in asphalt concrete production allows for economic and environmental benefits. Incorporating high Reclaimed Asphalt Pavement (RAP) contents in mixes at WMA temperatures poses a challenge in the ability to attain the quality of produced pavements. It is unknown if WMA production conditions influence the ...
  • Winter Roadway Maintenance Material Enhancers Field Evaluation
    Winter Roadway Maintenance Material Enhancers (Field) Evaluation
    Zhang, Huichun (Judy) ;
    van Aken, Benoit
    2018-04-06 | PDF
    In this study, the performance and cost analysis of four deicers products, i.e., Aqua Salina (AS), Beet Heet (BH), Green Blast (GB), Magic Minus Zero (MMZ), and two references, Rock Salt (RS) and/or Salt Brine (SB) were evaluated through parking lot tests and onroad tests. The rankings from the different tests were compared and discussed. The parki ...
  • Operational and Emission Analyses of Roundabouts Under Varied Vehicle and Pedestrian Demands
    Operational and Emission Analyses of Roundabouts Under Varied Vehicle and Pedestrian Demands
    Christofa, Eleni ;
    Knodler, Michael A.
    2018-04-05 | PDF
    Roundabouts are becoming more and more common as an alternative to signalized intersections throughout the United States. The primary reason for an increased interest in roundabout construction has been their safety advantages compared to signalized intersections due to the reduced number of conflict points and lower vehicle speeds (1). As a result ...
  • Understanding the Psychological Factors Underlying Smartphone Related Distracted Driving Exploratory Analysis Using a Nationwide Survey
    Understanding the Psychological Factors Underlying Smartphone Related Distracted Driving: Exploratory Analysis Using a Nationwide Survey
    Konduri, Karthik ;
    Dalal, Dev
    2018-04-02 | PDF
    As smartphone technology begins to reach sizeable levels of market saturation and as its usage becomes ubiquitous, distracted driving, and more specifically smartphone related distraction will experience substantial growth. In the United States, where smartphone ownership is around 77% for adults, cell phone related distracted driving has long been ...
  • A Management Plan for Historic Bridges in Virginia The 2017 Update
    A Management Plan for Historic Bridges in Virginia : The 2017 Update
    Miller, Ann B.
    2018-04-01 | PDF
    A Management Plan for Historic Bridges in Virginia, published in 2001, identified the management and treatment needs for 55 historic bridges in Virginia (i.e., bridges that were individually eligible for or listed on the National Register of Historic Places) that were under some measure of state purview. The plan was undertaken to serve as a manage ...
  • Behavior of EpoxyCoated Textured Reinforcing Bars
    Behavior of Epoxy-Coated Textured Reinforcing Bars
    Kim, Kun-Ho E ;
    Andrawes, Bassem
    2018-04-01 | PDF
    Cracking in bridge decks is a common but difficult problem to control. Both research and experience show that the use of epoxy-coated reinforcement, which is mandated by most state departments of transportation (DOT’s) for bridge decks, increases cracking. Although the epoxy coating protects the steel from corrosion, bond strength is compromised an ...
  • Next Generation Track Circuits
    Next Generation Track Circuits
    Brosseau, Joe ;
    Kindt, Joel
    2018-04-01 | PDF
    The Federal Railroad Administration (FRA) sponsored a project, performed by the Transportation Technology Center, Inc. (TTCI), to investigate next generation track circuit concepts that could support future methods of train control. Future train control concepts are being investigated in which train separation will be controlled by alternative tech ...
  • MOD Sandbox Demonstrations Independent Evaluation IE Bay Area Rapid Transit BART Integrated Carpool to Transit Access Program Evaluation Plan
    MOD Sandbox Demonstrations Independent Evaluation (IE) Bay Area Rapid Transit (BART) Integrated Carpool to Transit Access Program Evaluation Plan
    Cordahi, Gustave ;
    Shaheen, Susan
    2018-04-01 | PDF
    The Mobility on Demand (MOD) Sandbox Demonstration Program provides a venue through which integrated MOD concepts and solutions – supported through local partnerships – are demonstrated in real-world settings. For each of the 11 MOD Sandbox Demonstration projects, the MOD Sandbox Independent Evaluation includes an analysis of project impacts from p ...
  • Evaluation of Effective Bridge Deck Repair Maintenance Methods
    Evaluation of Effective Bridge Deck Repair Maintenance Methods
    Huang, Qindan ;
    Thomas, Joshua
    2018-04-01 | PDF
    As there are a large number of existing aging bridges in need of maintenance, Ohio Department of Transportation is seeking safer, better, and efficient approaches for patch-repair concrete removal on bridge decks. The current practice to remove concrete is by using pneumatic breakers, which presents a danger to operators and damages to the sound co ...
  • The Dynamics of PlugIn Electric Vehicles in the Secondary Market and Their Implication for Vehicle Demand Durability and Emissions
    The Dynamics of Plug-In Electric Vehicles in the Secondary Market and Their Implication for Vehicle Demand, Durability, and Emissions
    Turrentine, Thomas ;
    Tal, Gil
    2018-04-01 | PDF
    California is one of the first markets in the world to have a significant secondary market for plug-in electric vehicles (PEVs), which includes both battery electric vehicles (BEVs) and plug-in hybrid electric vehicles (PHEVs). This study examines the status of the nascent secondary PEV market in California. We examine who purchases these vehicles ...
  • Connected Vehicle Based Traffic Signal Optimization
    Connected Vehicle Based Traffic Signal Optimization
    Ban, Xuegang (Jeff) ;
    Li, Wan
    2018-04-01 | PDF
    ORCIDs: Jeff Ban, PI - 0000-0003-3605-971X Connected vehicles in smart cities, including vehicle to vehicle (V2V), vehicle to infrastructure (V2I), and vehicle to anything (V2X) communications, can provide more opportunities and impose more challenges for urban traffic signal control. This project aims to develop a framework, including modeling tec ...
  • Developing Georgias High Friction Surface Treatment HFST Program HFST Site Characteristics HFSTSC Data Collection and Analysis
    Developing Georgia’s High Friction Surface Treatment (HFST) Program - HFST Site Characteristics (HFST-SC) Data Collection and Analysis
    Tsai, James (Yichang) ;
    Wu, Yiching
    2018-04-01 | PDF
    The Georgia Department of Transportation (GDOT) has invested millions of dollars in the high friction surface treatment (HFST) and will continue investing more to reduce potential run-off-road (ROR) crashes on sharp curves. GDOT has taken the initiative to work with Georgia Tech's research team to improve its HFST program. An enhanced HFST-SS metho ...
  • Durable Pavement Marking and Grooving
    Durable Pavement Marking and Grooving
    Hawkins, Neal ;
    Smadi, Omar
    2018-04-01 | PDF
    Maintaining effective pavement markings year-round is a challenge in Iowa, where winter maintenance causes so much damage due to the harsh winter exposure from snow plow blades, sand, and salt brine. Given these conditions, and a limited painting season, it is critical that agencies select the proper pavement marking materials for the roadways in t ...
  • Best Practices for Assessing Roadway Damages Caused by Flooding Research Project Capsule 183P
    Best Practices for Assessing Roadway Damages Caused by Flooding: Research Project Capsule [18-3P]
    Tao, Mingjiang
    2018-04-01 | PDF
    The United States has witnessed numerous natural disasters in recent years that resulted in the inundation of thousands of roadway lane-miles. Assessment of flooded pavements is a challenge that transportation agencies will likely face more often as climatologists predict that the changing climate will produce more frequent and extreme events. The ...
  • Evaluation of NCHRP 747 Pavement Forensic Guide for GDOTs Adoption
    Evaluation of NCHRP 747 Pavement Forensic Guide for GDOT’s Adoption
    Kim, S. Sonny ;
    Geum Chorzepa, Mi
    2018-04-01 | PDF
    This report presents the recommendation for whether the Georgia Department of Transportation (GDOT) should adopt the National Cooperative Highway Research Program (NCHRP) Report 747 (Guide for Conducting Forensic Investigations of Highway Pavements) as a guide to conduct forensic investigations in Georgia. This report documents the evaluation of th ...
  • The Contribution of Transportation and Land Use to Citizen Perceptions of Livability in Oregon MPOs
    The Contribution of Transportation and Land Use to Citizen Perceptions of Livability in Oregon MPOs
    Lewis, Rebecca ;
    Parker, Robert G.
    2018-04-01 | PDF
    Livability is a key focus of integrating transportation and land use planning throughout the United States, and the world. Livability is a concept that has been guiding U.S. Department of Transportation (USDOT) policy since 2009, focusing on six principles including: providing transportation choices, expanding housing location, improving economic c ...
  • Addressing BicycleVehicle Conflicts with Alternate Signal Control Strategies
    Addressing Bicycle-Vehicle Conflicts with Alternate Signal Control Strategies
    Kothuri, Sirisha ;
    Kading, Andrew
    2018-04-01 | PDF
    There is nationwide interest in supporting sustainable and active transportation modes such as bicycling and walking due to the many benefits associated with them, including reduced congestion, lower emissions and improved health. Although the number of bicyclists is increasing, safety remains a top concern. In urban areas, a common crash type invo ...
  • Sources of Funding Transit in Texas 2018
    Sources of Funding Transit in Texas [2018]
    Cherrington, Linda Kay ;
    Tan, Shuman
    2018-04-01 | PDF
    This report provides information on the sources of revenue to fund transit in urban and rural areas in Texas—through federal, state, and local sources. All public transit systems are eligible for federal funds from the Federal Transit Administration (FTA). The state agency responsible for allocating state transit funds is the Texas Department of Tr ...
  • Domestic Airline Fares Consumer Report Fourth Quarter 2017 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: Fourth Quarter 2017 Passenger and Fare Information
    United States. Department of Transportation
    2018-04-01 | Domestic Airline Fares Consumer Report | PDF
    Each month the Department of Transportation releases an Air Travel Consumer Report that includes information about various service quality elements, including flight delays, mishandled baggage, over sales, and a variety of other types of consumer complaints. In response to an increasing number of inquiries from consumers about domestic airline pric ...
  • Correlation Between Resilient Modulus MR of Soil Light Weight Deflectometer LWD and Falling Weight Deflectometer FWD
    Correlation Between Resilient Modulus (MR) of Soil, Light Weight Deflectometer (LWD), and Falling Weight Deflectometer (FWD)
    Park, Sung Soo ;
    Bobet, Antonio
    2018-04-01 | PDF
    INDOT adopted the Mechanistic-Empirical Pavement Design Guide (MEPDG) beginning January 1, 2009, which is based on the FHWA Long Term Pavement Performance (LTTP) field study. The resilient modulus of the soil, MR, is required to implement the new design guide, as well as the pavement input parameters. The soil resilient modulus test requires specia ...
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