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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 3141 - 3160 of 35958 results
  • An Integrated Critical Information Delivery Platform for Smart Segment Dissemination to Road Users
    An Integrated Critical Information Delivery Platform for Smart Segment Dissemination to Road Users
    Li, Lingxi ;
    Chen, Yaobin
    2021-10-01 | PDF
    An integrated critical information delivery platform for smart segment dissemination to road users was developed. A statewide baseline milepost geodatabase was created at 0.1-mile resolution with tools, protocols, and interfaces that allow other data sources to be efficiently utilized. A variety of data sources (e.g., INRIX, CARS, Doppler, camera i ...
  • Binder Availability in Recycled Materials Review of Literature and Available Quantification Methods
    Binder Availability in Recycled Materials: Review of Literature and Available Quantification Methods
    Martin, Amy Epps ;
    Arambula-Mercado, Edith
    2021-10-01 | PDF
    Increasing recycled material content in asphalt mixtures provides economic and environmental benefits, but each unique material combination of virgin and recycled materials and additives must be engineered to ensure adequate performance with proper selection of component materials and balanced proportioning, as well as consideration of recycled bin ...
  • Prioritized Safety Consideration by Work Zone Types and Pilot Implementation
    Prioritized Safety Consideration by Work Zone Types and Pilot Implementation
    Lin, Pei-Sung ;
    Islam, Mouyid Bin
    2021-10-01 | PDF
    With the growing need for maintenance or reconstruction of existing infrastructure and the construction of new infrastructure, work zone (WZ) setup and management are important for the safe and efficient movement of road users and protection of construction workers and personnel. Applications of Smart Work Zone (SWZ) systems, which are efficient in ...
  • Determination of Input Data for Stone Matrix Asphalt and Polymer Modified DenseGraded Mixtures for Use in the MechanisticEmpirical Pavement Design Guide
    Determination of Input Data for Stone Matrix Asphalt and Polymer Modified Dense-Graded Mixtures for Use in the Mechanistic-Empirical Pavement Design Guide
    Nair, Harikrishnan ;
    Saha, Bipad
    2021-10-01 | PDF
    AASHTO’s Mechanistic Empirical Pavement Design Guide (MEPDG) and AASHTOWare Pavement ME Design software (hereinafter “Pavement ME Design”) provide an improved process for conducting pavement analysis and for developing pavement designs based on mechanistic-empirical principles. The Virginia Department of Transportation (VDOT) officially adopted the ...
  • Where the Sidewalks End Evaluating Pedestrian Infrastructure and Equality
    Where the Sidewalks End: Evaluating Pedestrian Infrastructure and Equality
    Coppola, Nicholas ;
    Marshall, Wesley E.
    2021-10-01 | PDF
    Academic literature has scant research on sidewalks, and some cities are lacking information to rectify an unprecedented backlog of deteriorating pedestrian infrastructure. A lack of data stymies efforts to understand sidewalks, how they may impact equity, and how cities can prioritize where to begin to rectify these issues. Remote sensing data are ...
  • Fauquier County Road Orders 17841800
    Fauquier County Road Orders 1784–1800
    Miller, Ann Brush
    2021-10-01 | PDF
    The road history projects undertaken by the Virginia Transportation Research Council establish the feasibility of studies of early road networks and their use in the environmental review process. These projects, by gathering and publishing the early road orders of the vast parent counties and other significant areas, also lay the foundation for add ...
  • Using Unmanned Aircraft Systems for Crash Reconstructions During Suboptimal Conditions
    Using Unmanned Aircraft Systems for Crash Reconstructions During Suboptimal Conditions
    Quiroga, Cesar ;
    Starek, Michael J.
    2021-10-01 | PDF
    The Texas Department of Transportation (TxDOT) has a strategic interest in using unmanned aircraft systems (UASs) to support a variety of initiatives, including traffic incident management. TxDOT is interested in identifying and documenting UAS uses to determine to what degree UASs can be used to streamline the process to clear and document fatal c ...
  • Studies To Improve Temporary Guide Signs in Work Zones
    Studies To Improve Temporary Guide Signs in Work Zones
    Theiss, LuAnn ;
    Higgins, Laura
    2021-10-01 | PDF
    This report documents the efforts and results of a one-year research project aimed at improving temporary guide signs in long-term work zones. The researchers held discussions with Texas Department of Transportation personnel to gather information about their experiences with temporary guide signs in work zones. The researchers also performed posit ...
  • Evaluation of the Retsch Technology Camsizer P4 To Assess the Shape of Crushed Particles Proposed to Be Added to Natural Sand Fine Aggregate Used in Portland Cement Concrete
    Evaluation of the Retsch Technology Camsizer P4 To Assess the Shape of Crushed Particles Proposed to Be Added to Natural Sand Fine Aggregate Used in Portland Cement Concrete
    Dawson, M. Robert
    2021-10-01 | PDF
    The goal of this study was to determine the angularity and roundness of particles for use in fine aggregate for Portland Concrete. To develop a new test method for evaluation of fine aggregate in Portland Cement concrete, an instrument called the “Camsizer P4” was used for fine-particle size and shape analyses. This instrument uses advanced image a ...
  • Data Analytics and Evaluation of the Gainesville Trapezium Connected Vehicle Signal Phasing and Timing SPaT Deployment Project
    Data Analytics and Evaluation of the Gainesville Trapezium Connected Vehicle Signal Phasing and Timing (SPaT) Deployment Project
    Banerjee, Tania ;
    Manjunatha, Pruthvi
    2021-10-01 | PDF
    The overall goal of this project was to evaluate the efficacy of dedicated short-range communications (DSRC) in improving efficiency and safety within a network of signalized intersections. In this report, we describe the data collection, processing, and analysis mechanisms for traffic state data collected from the Gainesville Trapezium, a set of h ...
  • Human Machine Interface for Connected Vehicle Requirements Development and Assessment
    Human Machine Interface for Connected Vehicle: Requirements, Development and Assessment
    Ahmed, Mohamed ;
    Gaweesh, Sherif
    2021-10-01 | PDF
    The Connected Vehicle Pilot project was deployed on Interstate 80 corridor in Wyoming with the goal of promoting safety and mobility for road users with a focus on commercial vehicles, Highway patrol, and winter maintenance vehicles. One of the key components of the Wyoming department of transportation (WYDOT) CV pilot is the Human Machine Interfac ...
  • SelfHeating Electrically Conductive Concrete Demonstration Project Tech Transfer Summary
    Self-Heating Electrically Conductive Concrete Demonstration Project [Tech Transfer Summary]
    Ceylan, Halil ;
    Kim, Sunghwan
    2021-10-01 | PDF
    The primary objective of this research was to construct, demonstrate, and monitor a full-scale field implementation of the largest-to-date operational, electrically conductive concrete (ECON) heated pavement system (HPS) using different electrode configurations. The goals of the project included the following: • Develop a cost-effective methodology ...
  • ReTightening the Large Anchor Bolts of Support Structures for Signs and Luminaires Phase II
    Re-Tightening the Large Anchor Bolts of Support Structures for Signs and Luminaires: Phase II
    Dietrich, Zachary ;
    Phares, Brent M.
    2021-10-01 | PDF
    The Minnesota Department of Transportation (MnDOT) funded two projects in an effort to mitigate anchor bolt connection loosening and develop improved pre-tensioning steps for its sign, luminaire, and traffic signal (SLTS) structures. The Phase I study proposed new pre-tensioning procedures, completed laboratory testing, did an in-depth literature r ...
  • Synthesis of Technical Requirements and Considerations for Automated Snowplow Route Optimization
    Synthesis of Technical Requirements and Considerations for Automated Snowplow Route Optimization
    Dowds, Jonathan ;
    Sullivan, James
    2021-10-01 | PDF
    DOTs and other transportation agencies are increasingly using automated methods for snowplow route optimization, which have been demonstrated to produce significant savings when they result in the implementation of new routes. However, many route optimization projects have fallen short of implementation due to technical/operational issues with the ...
  • SelfHeating Electrically Conductive Concrete Demonstration Project
    Self-Heating Electrically Conductive Concrete Demonstration Project
    Malakooti, Amir ;
    Sadati, Sajed
    2021-10-01 | PDF
    Many transportation agencies allocate significant time and resources each year to remove ice and snow from their paved surfaces to achieve a safe, accessible, and operational transportation network. An electrically conductive concrete (ECON) heated pavement system (HPS) has been shown to be a promising alternative to conventional snow removal opera ...
    Supporting Files
  • Young Driver Crashes in Louisiana Understanding the Contributing Factors to Decrease the Numbers
    Young Driver Crashes in Louisiana: Understanding the Contributing Factors to Decrease the Numbers
    Mitran, Elisabeta ;
    Sun, Xiaoduan
    2021-10-01 | PDF
    Despite the early adoption of Graduated Driver Licensing (GDL) program, teens and young adults in Louisiana continued to experience crashes at higher rates and thereby considered as high-risk drivers. The aim of this study was to analyze young driver crash contributing factors and evaluate the Louisiana’s GDL program. Based on a comprehensive liter ...
  • DesignBuild Evaluation for General Aviation Hangars in Missouri
    Design-Build Evaluation for General Aviation Hangars in Missouri
    Goldstein, Glenn ;
    Hoffman, Richard
    2021-10-01 | PDF
    Design-build project delivery has been embraced across several states and local agencies for large and small public transportation projects. This delivery method has also been used extensively in the construction of privately owned and operated hangars to accelerate schedule and reduce construction cost. The State of Missouri launched this research ...
  • Connected Vehicle Safety Applications Using V2X Under Consideration of Bicycles Pedestrians and Persons With Special Needs
    Connected Vehicle Safety Applications Using V2X Under Consideration of Bicycles, Pedestrians and Persons With Special Needs
    Baqer, Mohammad ;
    Krings, Axel
    2021-10-01 | PDF
    In the context of connected vehicles, the focus of safety applications has mainly been on accident avoidance of motor vehicles, and little attention has been given to the safety of other traffic participants like bicycles, wheelchair operators, or visually impaired persons. This research first presents a bicycle safety application for connected veh ...
  • Measuring the Rates of WeightMile Tax Evasion in Oregon
    Measuring the Rates of Weight-Mile Tax Evasion in Oregon
    Martin, Andrew ;
    Koo, Jeeyen
    2021-10-01 | PDF
    In this report, three methods were selected to estimate WMT evasion rates for 2016-2018: 1) comparison of commercial truck screening data to WMT tax returns, 2) comparison of IRP registration filings to WMT tax returns, and 3) comparison of IFTA filings to WMT tax returns. Comparison of taxable miles calculated using commercial truck screening data ...
  • The Evolving Texas Megaregion Developing a Sustainable Megaregion Mobility Planning Blueprint
    The Evolving Texas Megaregion: Developing a Sustainable Megaregion Mobility Planning Blueprint
    Loftus-Otway, Lisa ;
    Bashar, Samira Binte
    2021-10-01 | PDF
    With the megaregional trend growing in the U.S., it is becoming increasingly important to recognize and reorient the scale of the mobility planning towards the megaregions for sustainable and equitable growth of regions. In 2013, European Union developed a new transportation planning process called Sustainable Urban Mobility Planning (SUMP). The ra ...
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