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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 1281 - 1300 of 36104 results
  • Performance Evaluation of Different Detection Technologies for Signalized Intersections in Minnesota
    Performance Evaluation of Different Detection Technologies for Signalized Intersections in Minnesota
    Grossman, Malcolm ;
    Jiao, Yuankun
    2024-04-01 | PDF
    This research evaluates the performance of non-intrusive detection technologies (NITs) for traffic signals in Minnesota. Prior work shows that while no single NIT device performs best in all situations, under specific circumstances, some NIT devices consistently outperform others. Our goal in this research is to find which NIT devices perform bette ...
  • Speed Limits in Texas
    Speed Limits in Texas
    Fitzpatrick, Kay ;
    Venglar, Steven P.
    2024-04-01 | PDF
    Posted speed limits (PSLs) are a highly complex issue involving engineering, human factors, and political and societal concerns. On a national level, recent research along with calls to change how speed limit are set, especially for city streets, have generated extensive discussion on future speed limit setting procedures. Within this TxDOT project ...
  • Guidebook for Project Management
    Guidebook for Project Management
    Asher, Jill ;
    Caudill, Keith
    2024-04-01 | PDF
    For the Kentucky Transportation Cabinet’s (KYTC) Department of Highways, project development encompasses all the work activities needed to move a transportation project from concept and project initiation to construction letting. Developing projects efficiently requires the adoption of sound project management practices. Although KYTC has a long tr ...
  • OSTR Research Roundup Newsletter April 2024
    OST-R Research Roundup Newsletter: April 2024
    United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
    2024-04-01 | OST-R Research Roundup | PDF
    News from across OST-R and its research community.
  • Reducing Vehicle Licensing and Titling Fraud
    Reducing Vehicle Licensing and Titling Fraud
    Brown, Mallory ;
    Martin, Andrew
    2024-04-01 | PDF
    This study reviews Kentucky’s vehicle licensing and registration program, evaluates methods of motor vehicle title fraud, examines current anti-fraud mechanisms in Kentucky, reports on vehicle titling and anti-fraud efforts in other states, assesses Ohio’s vehicle inspection program, and develops a proposal for a new Kentucky rebuilt title inspecti ...
  • PerformanceRelated Specifications for Pavement Milling
    Performance-Related Specifications for Pavement Milling
    Cho, Seonghwan ;
    Moncada, Oscar Andrés
    2024-04-01 | PDF
    The primary objective of this research was to evaluate pavement damage that may occur during the pavement milling process, which is critical to the overlay design and performance of asphalt pavements. To achieve this purpose, the most common milling practices in Indiana were implemented on several trial sections and various damage characterization ...
  • NJDOT Compensation Scan and Retention Study Technical Summary
    NJDOT Compensation Scan and Retention Study [Technical Summary]
    Gaines, Danena
    2024-04-01 | PDF
    With noticeable staff turnover in certain employment classifications, NJDOT engaged Cambridge Systematics (CS) to conduct the Compensation Scan and Retention Study. This scope of work is focused on researching and collecting information on compensation and retention of employees utilized by municipalities and county transportation agencies, private ...
  • VISSIM Simulation Calibration Procedure
    VISSIM™ Simulation Calibration Procedure
    Hunter, Michael ;
    Rodgers, Michael O.
    2024-04-01 | PDF
    Underlying most VISSIM™ calibration is the adjustment of the Wiedemann car following parameters used to simulate vehicle behavior within the model. The Wiedemann models directly influence a roadway segment’s capacity, saturation flow, density, etc. Several key features were identified as part of this study. Through the project a calibration approac ...
    Supporting Files
  • Statewide Calibration of CPT Direct Design Methods Using Static Load Test Data Research Project Capsule 243GT
    Statewide Calibration of CPT Direct Design Methods Using Static Load Test Data: Research Project Capsule [24-3GT]
    Abu-Farsakh, Murad Y. ;
    Rupnow, Tyson
    2024-04-01 | PDF
    Deep foundations are typically considered when subsurface soil conditions are weak and unable to safely support superstructure loads. In these cases, pile foundations are used to carry superstructure loads and transfer them deep into the ground. Therefore, an accurate assessment of pile resistance is crucial for the safe and economical design of pi ...
  • GIS Tools to Identify Bridges with Bats Fact Sheet
    GIS Tools to Identify Bridges with Bats [Fact Sheet]
    Perez-Jimenez, Janette ;
    Koch, Jacob
    2024-04-01 | PDF
    Accurately predicting bat use of bridges is an important need for planning of bridge repair and maintenance. However, less than 1% of bridges in Ohio have been surveyed for bats, limiting the inferences that can be drawn from existing data and modelling tools. We developed a method for passive camera surveys of bat use of bridges and reevaluated OD ...
  • Removing Residual Lane Markings to Reduce Driver Confusion
    Removing Residual Lane Markings to Reduce Driver Confusion
    Hurwitz, David ;
    Jashami, Hisham
    2024-04-01 | PDF
    This research studied the relationship between removal methods used to remove pavement markings and driver confusion when encountering ghost lines. The study included field based and driver video experiments. Video data was collected at five locations in Oregon to examine the frequency with which drivers did not follow the correct markings when enc ...
  • Assessing the Total Cost of Ownership of Electric Vehicles Among California Households
    Assessing the Total Cost of Ownership of Electric Vehicles Among California Households
    Chakraborty, Debapriya ;
    Konstantinou, Theodora
    2024-04-01 | PDF
    The primary metric for measuring electric vehicle (EV) adoption growth is new car sales. However, to enable mass market penetration, EV adoption in the used car market will play a crucial role. The used vehicle market is relatively understudied or has been studied mostly for specific regions. This project analyzed US national consumer expenditure s ...
  • Temperature Effects in MatchCast Segmental Bridge Construction Summary
    Temperature Effects in Match-Cast Segmental Bridge Construction [Summary]
    Potter, William ;
    Riding, Kyle A
    2024-04-01 | PDF
    The three main objectives of this research were to identify bridge segment geometries (width to length ratios) susceptible to this type of distortion, develop best practices to mitigate transverse bowing of match-cast bridge segments during production, and to determine which practical curing mitigation measures are most effective in reducing bowing ...
  • Traffic Control Device Analysis Testing and Evaluation Program FY2023 Activities
    Traffic Control Device Analysis, Testing, and Evaluation Program: FY2023 Activities
    Finley, Melisa D. ;
    Pratt, Michael P.
    2024-04-01 | PDF
    Traffic control devices are a primary means of communicating highway information to road users. The design, application, and maintenance of traffic control devices are under constant transformation as new technologies, methodologies, and policies are introduced. This project provides the Texas Department of Transportation with a mechanism to conduc ...
  • Advancing Urban Stream RestorationEnhancement Practices for Compensatory Mitigation Credits
    Advancing Urban Stream Restoration/Enhancement Practices for Compensatory Mitigation Credits
    Schwartz, John ;
    Brown, Jason
    2024-04-01 | PDF
    Tennessee Department of Transportation Research is required to provide compensatory mitigation credits per Section 404 of the Clean Water Act and Tennessee’s Aquatic Resource Alteration Permit program when aquatic resource losses occur from highway construction. The Tennessee Stream Quantification Tool (TN SQT V.1) was created in 2019 to generate d ...
  • Product Information Catalog and Vehicle Listing vPIC Analytical Users Manual 2022
    Product Information Catalog and Vehicle Listing (vPIC) Analytical User's Manual, 2022
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-04-01 | PDF
    This document provides guidance to analytical users of Vehicle Identification Number (VIN) decoding information generated for the National Highway Traffic Safety Administration’s (NHTSA) crash studies using NHTSA’s Product Information Catalog and Vehicle Listing (vPIC). The vPIC VIN decoder is built based on the vehicle manufacturer submissions to ...
  • Teens and Distracted Driving in 2022 Teen Distracted Driver Data
    Teens and Distracted Driving in 2022 [Teen Distracted Driver Data]
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-04-01 | PDF
    The National Highway Traffic Safety Administration works to reduce the occurrence of distracted driving and raise awareness of its dangers. This risky driving behavior poses a danger not only to vehicle occupants but pedestrians and pedalcyclists as well. Driver distraction is a specific type of driver inattention that occurs when drivers divert at ...
  • Quick Facts 2022
    Quick Facts 2022
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-04-01 | PDF
    Quick reference of 2022 traffic safety numbers and statistics.
  • Bismarck Mandan 2021 Travel Demand Model Update
    Bismarck Mandan 2021 Travel Demand Model Update
    Motuba, Diomo ;
    Rahman, Baishali
    2024-04-01 | PDF
    The Bismarck Mandan Metropolitan Planning Organization (B-M MPO) Travel Demand Model (TDM) undergoes a comprehensive update every five years to incorporate the latest ground truths/data and advancements in transportation modeling techniques. The latest update incorporates data from the base year 2021 and partially from 2022, necessitated by the uni ...
  • Solutions To Mitigate DowelTieBar Propagated Cracking Phase 1
    Solutions To Mitigate Dowel/Tie-Bar Propagated Cracking – Phase 1
    Rao, Shreenath ;
    Abdualla, Hesham
    2024-04-01 | PDF
    This Phase 1 study was undertaken to evaluate cracking related to dowel bars and tie bars in concrete pavement. The results of the literature review and field studies suggest that under some conditions, restraint caused by dowel bars and tie bars in the concrete result in high early age stresses that contribute to cracking. Field evaluation of six ...
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