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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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0 of 1000
Showing 4681 - 4700 of 36908 results
  • Deploy and Test a SmartphoneBased Accessible Traffic Information System for the Visually Impaired
    Deploy and Test a Smartphone-Based Accessible Traffic Information System for the Visually Impaired
    Liao, Chen-Fu ;
    Davis, Brian
    2020-10-01 | PDF
    An increasing number of Accessible Pedestrian Signals (APS) have been installed at new or upgraded intersections to assist people with vision impairment to navigate streets. For un-signalized intersections and intersections without APS, people with vision impairment have to rely on their own orientation and mobility skills to gather necessary infor ...
  • Determine Proper Selection of Ride Quality Pay Adjustment Schedule and ReEvaluation of Current BonusPenalty Structure Technical Report
    Determine Proper Selection of Ride Quality Pay Adjustment Schedule and Re-Evaluation of Current Bonus/Penalty Structure: Technical Report
    Gurganus, Charles ;
    Messhenas, Saber
    2020-10-01 | PDF
    The Texas Department of Transportation (TxDOT) currently uses a guidance document to help select a ride quality pay schedule for paving projects. This guidance is more than 15 years old and was developed without a robust dataset. This project used more than 300 highway projects to categorize paving projects into eight groups. Following categorizati ...
  • LED Street Lighting Implementation Research Support and Testing
    LED Street Lighting Implementation Research, Support, and Testing
    Kramer, Robert
    2020-10-01 | PDF
    This report describes the results of technical analysis, field tests, and laboratory tests that were performed for LED highway lighting options by the Energy Efficiency and Reliability Center (EERC) at Purdue University Northwest for the Indiana Department of Transportation (INDOT). This effort was conducted over the past three years to evaluate an ...
  • Polyester Polymer Concrete for Bridge Deck Overlays
    Polyester Polymer Concrete for Bridge Deck Overlays
    Stevens, Robert J ;
    Guthrie, W Spencer
    2020-10-01 | PDF
    The objectives of this research were to 1) compile a synthesis of information about polyester polymer concrete (PPC) from the literature; 2) conduct a scanning tour to observe PPC construction, inspect in-service PPC overlays, and discuss topics related to PPC; 3) revise the existing Utah Department of Transportation (UDOT) PPC specification; 4) do ...
  • Minnesota Drive Ramps Microsurfacing Experimental Feature PostConstruction Report
    Minnesota Drive Ramps Microsurfacing Experimental Feature Post-Construction Report
    Pavey, Andrew
    2020-10-01 | PDF
    This project applied microsurfacing to 17 different Minnesota Drive ramp locations with varying geometry and traffic volumes during June of 2020. The emulsion formulation used a PG64-34 base binder highly modified with Styrene Butadiene Styrene (SBS) polymer and approximately 10.5% residual binder. This report documents the construction process and ...
    Supporting Files
  • Guides for System To Render ME Traffic Data for Pavement Design Instructors Guide
    Guides for System To Render M-E Traffic Data for Pavement Design: Instructor’s Guide
    Walubita, Lubinda F. ;
    Lee, Sang Ick
    2020-10-01 | PDF
    This guideline is to demonstrate the key findings of Texas Department of Transportation (TxDOT) Project 0-6940 Develop System to Render Mechanistic-Empirical Traffic Data for Pavement Design. It can be used as an instructor guide to provide in-depth understanding of site-specific ME-compatible traffic data for pavement design. The training workshop ...
  • Users Manual and Guides for the ME Traffic Database TDSS
    Users’ Manual and Guides for the M-E Traffic Database (T-DSS)
    Walubita, Lubinda F. ;
    Aldo, Aldo
    2020-10-01 | PDF
    This user’s manual aids users to understand and use the mechanistic-empirical (M-E) traffic data storage system (the T-DSS). The T-DSS is a Microsoft Access data storage system containing the essential outcomes of the project 0-6940 entitled “Develop System to Render Mechanistic Empirical Traffic Data for Pavement Design.” As a supporting material, ...
  • Legal and Permit Loads Evaluation for Indiana Bridges
    Legal and Permit Loads Evaluation for Indiana Bridges
    Kusiak, Chris ;
    Bowman, Mark D.
    2020-10-01 | PDF
    According to federal law, routine commercial vehicles must adhere to certain limits on their load configuration in order to operate legally on interstate highways. However, states may allow for heavier or different load configurations provided that bridges on the state and county highway system are load rated and, if necessary, posted with vehicles ...
  • Domestic Airline Fares Consumer Report Fourth Quarter 2019 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: Fourth Quarter 2019 Passenger and Fare Information
    United States. Department of Transportation
    2020-10-01 | 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 ...
  • Prototype Bluetooth Low Energy Preemption Proximity Alert System
    Prototype Bluetooth Low Energy Preemption Proximity Alert System
    Zhou, Hongmin “Tracy” ;
    Vickich, Mike
    2020-10-01 | PDF
    This document provides a system overview of the proposed prototype BLE proximity alert system for EV preemption at signalized intersections. It provides information about the existing and the BLE proximity alert enabled preemption systems, the system components and interfaces between them, the planned capabilities, and the system architecture.
  • Golf Carts on Public Roads Literature Review of Legislation and State of the Practice in the United States
    Golf Carts on Public Roads – Literature Review of Legislation and State of the Practice in the United States
    Mitran, Elisabeta ;
    Codjoe, Julius
    2020-10-01 | PDF
    This technical assistance report investigated the laws governing golf carts in the United States. Specifically, the report focused on reviewing literature to document the existing state laws and regulations for golf cart operation on public roads, including Louisiana-specific local laws, and the traffic safety impact of operating golf carts on publ ...
  • Traffic Safety Facts 2020 A Compilation of Motor Vehicle Crash Data
    Traffic Safety Facts 2020: A Compilation of Motor Vehicle Crash Data
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2020-10-01 | PDF
    In this annual report, Traffic Safety Facts 2020: A Compilation of Motor Vehicle Crash Data, the National Highway Traffic Safety Administration presents descriptive statistics about traffic crashes of all severities, from those that result in property damage to those that result in the loss of human life. Information from three of NHTSA’s primary d ...
  • Research Development Technology Strategic Plan FY 20182022
    Research, Development & Technology Strategic Plan: FY 2018-2022
    United States. Department of Transportation
    2020-10-01 | PDF
    This U.S. Department of Transportation (DOT) Research, Development, and Technology (RD&T) Strategic Plan presents DOT’s transportation research priorities and strategies to support the goals defined in the Department’s Strategic Plan for FY 2018–2022. This RD&T Strategic Plan is an update to the original plan published in 2017.1 This plan meets the ...
  • Implementing the Next Generation of UltraThin Slurry Overlays Technical Report
    Implementing the Next Generation of Ultra-Thin Slurry Overlays: Technical Report
    Scullion, Tom ;
    Estakhri, Cindy
    2020-10-01 | PDF
    In Research Project 0-6615, Use of Fine Graded Asphalt Mixes, a preliminary evaluation was made of the newly developed ultra-thin slurry seal (UTSS). The slurry is a combination of fine aggregates and emulsion that is rapidly sprayed onto the pavement surface. Some issues were raised about durability of the product, but the Texas Department of Tran ...
  • North Dakota Statewide Traffic Safety Survey 2020 Traffic Safety Performance Measures for State and Federal Agencies
    North Dakota Statewide Traffic Safety Survey, 2020: Traffic Safety Performance Measures for State and Federal Agencies
    Vachal, Kimberly ;
    Tchakounte-Wakem, Seguy
    2020-10-01 | PDF
    The statewide driver traffic safety survey provides baseline metrics for the Safety Division and others to use in understanding perceptions and self-reported behaviors related to focus issues. A core set of questions addresses nationally agreed upon priorities, including seat belts, impaired driving, and speeding. In addition to the core issues, qu ...
  • A SemiFlexible Composite Trackbed Material for Stiffness Transition in Bridge Approaches and Its Application
    A Semi-Flexible Composite Trackbed Material for Stiffness Transition in Bridge Approaches and Its Application
    Shen, Shihui ;
    Yu, Shuai
    2020-09-30 | PDF
    When railroad tracks extend from a subgrade to a bridge, the abrupt variation of the stiffness or track moduli can lead to transition problems. This is mainly due to a major settlement difference of the foundation and can cause a discontinuity of the track structure. If handled inappropriately, these problems would eventually accelerate the degrada ...
  • Impacts of COVID19 on Transportation Engineering Education and Research
    Impacts of COVID-19 on Transportation Engineering Education and Research
    Cheu, Ruey Long ;
    Rincones, Rodolfo
    2020-09-30 | PDF
    In March 2020, the COVID-19 pandemic began to spread in the United States forcing many universities to discourage in-person classes and research meetings. Many faculty members modified their modes of instruction and research activities. This research surveyed transportation faculty members across the United States that focused on the changes in the ...
  • Synthesis Report on the Use and Design of Snow Sheds to Protect Transportation Corridors Against Avalanches
    Synthesis Report on the Use and Design of Snow Sheds to Protect Transportation Corridors Against Avalanches
    Hendrikx, Jordy ;
    Jones, Alan
    2020-09-30 | PDF
    This report provides a synthesis on the use and design of snow sheds to protect transportation corridors against avalanches. This report summarizes the various snow shed designs and standards, regulation environment, construction and operational costs, risk, benefits, loading considerations, operational and design considerations, and alternate meth ...
  • Efficient Service Life Extension of Bridges through Riskbased Lifecycle Management and Highperformance Construction Materials Emphasis on Corrosionresistant Steel
    Efficient Service Life Extension of Bridges through Risk-based Lifecycle Management and High-performance Construction Materials: Emphasis on Corrosion-resistant Steel
    Frangopol, Dan M. ;
    Yang, David Y
    2020-09-30 | PDF
    Corrosion is responsible for structural deterioration of a large number of steel bridges. It can considerably compromise the safety and serviceability of bridges. Inspection and maintenance of corroded structures can lead to huge direct economic cost to bridge owners and significant indirect social and environmental consequences such as traffic del ...
  • Computer Learning and AIBased Investigation of Outward Facing Locomotive Videos for Trespassing Events and Behavior
    Computer Learning and AI-Based Investigation of Outward Facing Locomotive Videos for Trespassing Events and Behavior
    Havens, Timothy ;
    Lautala, Pasi
    2020-09-30 | PDF
    This project explored using the analysis of big data through artificial intelligence (AI) and computer learning (CL) to better understand the leading causes for trespassing incidents. The main data set for the analysis is the images from outward facing cameras located in locomotives. Such data are regularly used for analyzing the events in the case ...
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