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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 4961 - 4980 of 36908 results
  • Phase 3 MnDOT Slope Vulnerability Assessments
    Phase 3 MnDOT Slope Vulnerability Assessments
    Holmstadt, Jen ;
    Bradley, Nick
    2020-07-01 | PDF
    Phase 3 Slope Vulnerability Assessments is a continuation of Phases 1 and 2 previously conducted by WSB and MnDOT to determine the risk of slope failure along state highways. This phase includes 27 counties located in MnDOT districts 1, 2, 3, and 4. The three main components of the model are 1) identify past slope failures, 2) model the causative f ...
  • CUTR Transportation Webcast Series
    CUTR Transportation Webcast Series
    Lewis, Stephanie
    2020-07-01 | PDF
    Since 2010, the Center for Urban Transportation Research (CUTR) has hosted the biweekly CUTR Transportation Webcast Series and has completed a total of 178 webinars. The webinars were scheduled every other Thursday at 12pm (ET) to accommodate attendee participation from across the country and provide a standing appointment for when webinars occurre ...
  • Residual Strength of FullDepth Reclamation
    Residual Strength of Full-Depth Reclamation
    Torres-Machi, Cristina ;
    Beesam, Vishwa Vignan
    2020-07-01 | PDF
    Cold recycling technologies such as Full-Depth Reclamation (FDR) are sustainable and cost-effective techniques for pavement rehabilitation. Previous research has found current mechanistic-empirical (M-E) default values to be non-representative and overly conservative, leading to an underestimation of the true performance capabilities of FDR materia ...
  • California Department of Transportation Caltrans Highway Design Manual US Customary Units Seventh Edition
    California Department of Transportation (Caltrans): Highway Design Manual: U.S. Customary Units: Seventh Edition
    California. Department of Transportation
    2020-07-01 | PDF
    The 7th Edition Highway Design Manual (HDM) establishes uniform policies and procedures to carry out the state highway design functions of the California Department of Transportation. Refer to the "Foreword" section of the HDM for more information. When a chapter is updated, the date on the header of the updated pages is changed and a vertical line ...
  • Performance Based Planning Research Final Summary Report
    Performance Based Planning Research – Final Summary Report
    Kittelson & Associates
    2020-07-01 | PDF
    The Alaska Department of Transportation & Public Facilities (DOT&PF) retained Kittelson & Associates, Inc. to research national best practices related to project prioritization for Statewide Improvement Programs and apply them to the National Highway Performance Program (NHPP) funded National Highway System (NHS) project prioritization process. The ...
  • Construction and Design Soil Property Correlation
    Construction and Design Soil Property Correlation
    Fragomeni, Cara ;
    Hedayat, Ahmadreza
    2020-07-01 | PDF
    The main goal of this research study was to develop correlations among R-value, resilient modulus, and soil’s basic properties for available AASHTO soil types in databases in Colorado. In this study, an extensive database of systematically conducted resilient modulus and R-value tests along with the basic soil properties for Colorado soils was esta ...
  • Great Lakes Hyperloop Feasibility Study
    Great Lakes Hyperloop Feasibility Study
    Transportation Economics & Management Systems, Inc (TEMS)  ...
    2020-07-01 | PDF
    First envisioned by entrepreneur Elon Musk as a high-speed alternative to other modes of transportation, the Hyperloop consists of large-scale vacuum tubes with magnetic-levitation tracks that can carry capsules with passengers and/or cargo at speeds of up to 760 mi/h.On February 26, 2018, the Northeast Ohio Areawide Coordinating Agency (NOACA) and ...
  • Performance Evaluation of Highway Slopes on Yazoo Clay
    Performance Evaluation of Highway Slopes on Yazoo Clay
    Khan, Mohammad Sadik ;
    Amini, Farshad
    2020-06-30 | PDF
    Slope failures are frequent in highway embankments on expansive Yazoo clay in Mississippi due to frequent seasonal rainfall events associated with temperature and humidity variation causing expensive maintenance problems for the Mississippi Department of Transportation (MDOT). This State Study 286 was conducted to understand the performance of high ...
  • Air Pollution and Equity Impacts of the Proposed Tampa Bay Next Program From a Health in All Policies Perspective
    Air Pollution and Equity Impacts of the Proposed Tampa Bay Next Program From a Health in All Policies Perspective
    Kocak, Talha ;
    Menon, Nikhil
    2020-06-30 | PDF
    The impacts on air pollution and health equity of Tampa Bay Next, an ongoing transportation planning program in the Tampa area, were investigated in this study. Part 1 of this report describes simulations performed using a high-resolution modeling system to estimate changes in pollutant emissions, concentrations, population exposures, and exposure ...
  • Bearing Capacity Factors for Shallow Foundations Subjected to Combined Lateral and Axial Loading
    Bearing Capacity Factors for Shallow Foundations Subjected to Combined Lateral and Axial Loading
    Wasman, Scott ;
    McVay, Michael
    2020-06-30 | PDF
    In Florida, many types of structures are built on shallow foundations, which are usually concrete pads that provide footings for a structure and distribute a load over a wide area. For large structures, such as bridges, the footings are primarily designed to handle the vertical, or axial, load applied by the structure, with the usual assumption tha ...
  • Synthesis of Research Results and Technology Trends to Inform Policies for Smart Mobility of People and Goods Phase 2
    Synthesis of Research Results and Technology Trends to Inform Policies for Smart Mobility of People and Goods Phase 2
    Caldwell, Stan ;
    Hendrickson, Chris T.
    2020-06-30 | PDF
    This research project is intended to track disruptive technologies impacting transportation including automated and connected vehicles, big data analytics, shared vehicles, electric vehicles and novel modes of transportation. The researchers follow industry and technology trends, synthesize research results from the full range of Carnegie Mellon Un ...
  • Permeability Reduction of Restrained Concrete in a ChlorideRich Environment Phase I
    Permeability Reduction of Restrained Concrete in a Chloride-Rich Environment – Phase I
    Varner, Robert L.
    2020-06-30 | PDF
    The Mississippi Department of Transportation (MDOT) is currently requiring that permeability reducing admixtures be included in concrete mixtures used for bridge deck overlays through Special Provision No. 907-804-1 in an effort to improve the long-term performance of bridges. These admixtures are also included in section 713.02.4 of the 2017 editi ...
  • Highway Safety Manual Safety Performance Functions Roadway Calibration Factors Roadway Segments Phase 2 Part 1
    Highway Safety Manual Safety Performance Functions & Roadway Calibration Factors: Roadway Segments Phase 2, Part 1
    Khattak, Asad ;
    Ahmad, Numan
    2020-06-30 | PDF
    To enhance safety, the Tennessee Department of Transportation (TDOT) is in the process of adopting the Highway Safety Manual (HSM) as a resource to facilitate decision making based on the safety performance of its roadways. The predictive models which are known as Safety Performance Functions (SPFs) are used to forecast the expected crash frequency ...
  • Improving Mobility of Low Vision People with SuperReality Glasses
    Improving Mobility of Low Vision People with Super-Reality Glasses
    Cai, Yang
    ORCID ICON IMG
    2020-06-29 | PDF
    This project is to develop an assistive technology for the people with vision disabilities of central field loss (CFL) and low contrast sensitivity (LCS). This technology includes a pair of super-reality (SR) glasses with enhanced image contrast, for example, highlighting objects, detect signs, and lanes. The authors call the technology “super-real ...
  • Educational and Workforce Development Through Creation of Programs in Transportation To Generate Future Careers for Our Students in Navajo Nation Region [supporting datasets]
    Ehteshami, Gholam R
    ORCID ICON IMG
    2020-06-28 | PDF
    Navajo Technical University (NTU) in New Mexico, has made a partnership with the Tran-SET regional center at Louisiana State University, LSU. We have provided learning and training the Native American students in transportation-related Industries to some of STEM students at NTU through these partnerships opportunities. The program was designed and ...
    Dataset Supporting Files
  • Active Transportation and Community Health Impacts of Automated Vehicle Scenarios An Integration of the San Francisco Bay Area Activity Based Travel Demand Model and the Integrated Transport and Health Impacts Model ITHIM
    Active Transportation and Community Health Impacts of Automated Vehicle Scenarios: An Integration of the San Francisco Bay Area Activity Based Travel Demand Model and the Integrated Transport and Health Impacts Model (ITHIM)
    Jaller, Miguel ;
    Pourrahmani, Elham
    2020-06-25 | PDF
    This study evaluates the potential human health impacts from connected and autonomous vehicles (CAVs) scenarios in the San Francisco, Bay Area. The study concentrates on impacts derived from the effects of CAVs on travel demand, safety, and environmental emissions. The study combines an extensive literature review about the extent of such potential ...
  • Examining Senior Drivers Attitudes Towards Advanced Driver Assistance Systems after Naturalistic Exposure
    Examining Senior Drivers’ Attitudes Towards Advanced Driver Assistance Systems after Naturalistic Exposure
    Liang, Dan ;
    Lau, Nathan
    2020-06-18 | PDF
    The increasing number of senior drivers may introduce new road risks due to age-related declines in physical and cognitive abilities. Advanced driver assistance systems (ADAS) have been proposed as solutions to minimize age-related declines, thereby increasing both senior safety and mobility. This study examined factors that influence seniors’ atti ...
  • Integrating Driving Simulator Experiment Data With a MultiAgent Connected Automated Vehicles Simulation MACAVs Platform to Quantify Improved Capacity
    Integrating Driving Simulator Experiment Data With a Multi-Agent Connected Automated Vehicles Simulation (MA-CAVs) Platform to Quantify Improved Capacity
    Wang, Haizhong ;
    Hurwitz, David
    2020-06-15 | PDF
    Autonomous vehicles (AVs) at varying market penetration rates will change traffic flow and highway performance. At AV market penetration rates of between 0 percent and 100 percent, human-driven vehicles (HVs) will be interacting with AVs. However, little is known about how HVs interact with AVs. Using the Oregon State University Driving Simulator, ...
  • Efficient Extraction and Evaluation of Complex Pavement Markings from Mobile Laser Scan Data
    Efficient Extraction and Evaluation of Complex Pavement Markings from Mobile Laser Scan Data
    Jung, Jaehoon ;
    Olsen, Michael J.
    2020-06-15 | PDF
    Pavement markings are an important traffic control device, enhancing both the safety and efficiency of various modes of transportation by aiding vehicles, bicyclists, and pedestrians in effectively navigating the transportation network. In this Pacific Northwest Transportation Consortium (PacTrans) project, the authors developed a new framework to ...
  • Integrated Implementation of Innovative Intersection Designs [supporting datasets]
    Rouphail, Nagui M. ;
    Cunningham, Christopher M.
    2020-06-10 | PDF
    These files belong to a research project on evaluating different bicycle and pedestrian crossing options at Continuous Flow Intersections (CFI). These are the simulation models for different CFI crossing alternatives for pedestrians and bicycles. Three parameters were varied to create the scenario: a) number of displaced left turn legs (4 vs. 2) b) ...
    Dataset Supporting Files
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