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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 2881 - 2900 of 36873 results
  • Evaluation of the Performance of A709 Grade 65 QST Bridge Steel
    Evaluation of the Performance of A709 Grade 65 QST Bridge Steel
    Dahlberg, Justin M.
    2022-09-01 | PDF
    The primary goal for this project was to evaluate the efficacy of A709 Grade QST 65 steel for use in Iowa bridge projects. The objectives of the project were as follows: Identify the current state of use of A709 Grade QST 65 steel in bridge projects; Identify the ductility and strength characteristics of A709 Grade QST 65 steel through full-scale l ...
  • Study of Operational and Safety Impacts of Disabled and Abandoned Vehicles on FDOT Roadways
    Study of Operational and Safety Impacts of Disabled and Abandoned Vehicles on FDOT Roadways
    Al-Deek, Haitham ;
    Sandt, Adrian
    2022-09-01 | PDF
    Disabled and abandoned vehicles (DAVs) are a common occurrence on Florida roadways. This research focused on evaluating the operational and safety impacts of DAVs and identifying and evaluating methods to reduce these impacts. A comprehensive literature review showed that previous studies focused on DAV response (including the use of innovative tow ...
  • Integration of LaneSpecific Traffic Data Generated From Realtime CCTV Videos Into INDOTs Traffic Management System
    Integration of Lane-Specific Traffic Data Generated From Real-time CCTV Videos Into INDOT’s Traffic Management System
    Chien, Stanley ;
    Christopher, Lauren
    2022-09-01 | PDF
    The Indiana Department of Transportation (INDOT) uses about 600 digital cameras along populated Indiana highways in order to monitor highway traffic conditions. The videos from these cameras are currently observed by human operators looking for traffic conditions and incidents. However, it is time-consuming for the operators to scan through all vid ...
  • Pedestrian User Experience at Roundabouts
    Pedestrian User Experience at Roundabouts
    Godavarthy, Ranjit ;
    Russell, Eugene
    2022-09-01 | PDF
    This study explores the nature and extent of problems related to pedestrian user experience at Minnesota roundabouts. Pedestrian user experience in this study is measured by way of studying driver-yielding rates toward pedestrians at Minnesota roundabout crossings, pedestrian infrastructure design, and pedestrian behavior characteristics at Minneso ...
  • MediumTruck Special Study
    Medium-Truck Special Study
    Mynatt, Mark ;
    Zhang, Fan
    2022-09-01 | PDF
    This technical report describes the sample design, data collection, data coding, weighting, estimation methods, and findings of the Medium-Truck Special Study (MTSS), the purpose of which is to identify critical reasons for the critical events and causal factors in fatal crashes and to assess if crash avoidance technologies could have affected the ...
  • The 247 Sobriety Programs Effects on Impaired Drivers in North Dakota 20142021
    The 24/7 Sobriety Program’s Effects on Impaired Drivers in North Dakota: 2014–2021
    Vachal, Kimberly ;
    Zhou, Yun
    2022-09-01 | PDF
    The 24/7 Sobriety Program is an intervention strategy mandating that alcohol-impaired driving offenders remain sober as a condition of bond or pre-trial release. The goal is to monitor the most at-risk offenders in North Dakota and require that these individuals remain sober in order to keep roadways safe from hazardous drivers. As a component of t ...
  • Development of an Automated Methodological Procedure To Improve the Identification of CurveRelated Crashes in the Crash Records Information System CRIS
    Development of an Automated Methodological Procedure To Improve the Identification of Curve-Related Crashes in the Crash Records Information System (CRIS)
    Xu, Yang ;
    Han, Zhe
    2022-09-01 | PDF
    Horizontal curves can improve the safety and comfort of a ride for drivers and passengers by preventing a sharp turn from one direction to another. However, the role of curves in vehicle crashes and their safety impacts are underestimated due to the substantial number of curve-related crash misclassifications in CRIS. Therefore, there is an urgent ...
  • FDOT Land Use Analysis to Enhance Successful Logistics Activity Center Development in Florida
    FDOT Land Use Analysis to Enhance Successful Logistics Activity Center Development in Florida
    Ozkul, Seckin ;
    Hooker, Robert
    2022-09-01 | PDF
    Florida’s massive population growth brings higher emphasis on the freight and logistics aspect in Florida and the challenge of maximizing the economic development potential by attracting more companies to the State. Above mentioned challenge necessitated this project to find optimal areas which are most suitable for logistics activities to be locat ...
  • Traffic Safety Facts 2020 Data Summary of Motor Vehicle Crashes
    Traffic Safety Facts 2020 Data: Summary of Motor Vehicle Crashes
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2022-09-01 | PDF
    This edition of Traffic Safety Facts briefly summarizes motor vehicle crash data from 2020 and compares them to the period 2011 to 2020. Among the key findings: In 2020 an estimated 38,824 people were killed in 5,250,837 police-reported traffic crashes and an estimated 2,282,015 people were injured, a 6.8 percent increase in fatalities compared to ...
  • A Review of Floridas FC5 Raveling Condition Assessment and Measurement Methods Summary
    A Review of Florida’s FC-5 Raveling Condition Assessment and Measurement Methods [Summary]
    Greene, James ;
    Hsieh, Yung-An
    2022-09-01 | PDF
    In this study, the research team determined if raveling can be assessed through Florida’s existing pavement condition survey or through new 3D pavement surface data collection systems currently being implemented by Florida. Once raveling is accurately accounted for separately, it should then be accounted for in subsequent pavement performance forec ...
  • Shear Behavior of Spliced Posttensioned Girders With Ungrouted Tendons Final Report
    Shear Behavior of Spliced Post-tensioned Girders With Ungrouted Tendons: Final Report
    Han, Sangyoung ;
    Zaborac, Jarrod
    2022-09-01 | PDF
    This experimental study was developed to evaluate the shear performance of spliced post-tensioned girders with grouted and ungrouted ducts. Demand for expedited construction processes and increased girder spans make spliced girder systems attractive options for medium- to long-span bridges. Since the spliced girder elements are subjected to signifi ...
  • Understanding Asset Management Systems Utilized by Municipalities in Massachusetts
    Understanding Asset Management Systems Utilized by Municipalities in Massachusetts
    Mogawer, Walaa S. ;
    Austerman, Alexander J.
    2022-09-01 | PDF
    A MassDOT goal is to have an overall idea of the pavement condition of state and local roads in Massachusetts. This study cataloged the different pavement management systems (PMS) being used by municipalities, Metropolitan Planning Organizations (MPOs), and Regional Planning Agencies (RPAs) throughout Massachusetts. A comprehensive literature revie ...
  • Integrating Drones Into MDOTs DaytoDay Traffic and Asset Management Project Spotlight
    Integrating Drones Into MDOT’s Day-to-Day Traffic and Asset Management [Project Spotlight]
    Cook, Steven J.
    2022-09-01 | PDF
    The capabilities of unmanned/uncrewed aerial system (UAS) continue to advance, with a wide variety of applications useful for the condition assessment and monitoring of transportation infrastructure. This Phase 3 project focused on four UAS uses cases and how to integrate their results into Michigan Department of Transportation (MDOT) databases and ...
  • Improving the Longterm Condition of Pavements in Massachusetts and Determining Return on Investment Implementing the AASHTO MechanisticEmpirical Pavement Design GuidePHASE II
    Improving the Long-term Condition of Pavements in Massachusetts and Determining Return on Investment: Implementing the AASHTO Mechanistic-Empirical Pavement Design Guide—PHASE II
    Mogawer, Walaa S. ;
    Austerman, Alexander J.
    2022-09-01 | PDF
    The goal of this study was to develop an AASHTOWare® Pavement M-E user’s manual and develop a local experimental plan and sampling template for Massachusetts. A stand-alone software manual was developed that provides a thorough step-by-step procedure on how to use the software. The manual guides users on how to generate the data, in particular, mat ...
  • FDOT Identification of Prospective Solutions for Florida Trade Imbalance and Empty Backhauls
    FDOT Identification of Prospective Solutions for Florida Trade Imbalance and Empty Backhauls
    Ozkul, Seckin ;
    Hooker, Robert
    2022-09-01 | PDF
    Florida struggles with a serious imbalance between inbound and outbound freight. Statistics from the Federal Highway Administration reveal that the total freight tonnage entering Florida is nearly double the tonnage leaving the state. This imbalance suggests that many trucks and other modes of freight transportation leave the state empty or only pa ...
  • Automated Methodological Procedure for Identifying CurveRelated Crashes in CRIS
    Automated Methodological Procedure for Identifying Curve-Related Crashes in CRIS
    Xu, Yang ;
    Han, Zhe
    2022-09-01 | PDF
    The product developed by Project 0-7050 is an automated methodological procedure for identifying curve-related crashes in CRIS. This document provides detailed information on the implementation of the automated methodological procedure. In order to automatically implement the methodological procedure for identifying curve-related crashes, the CTR r ...
  • TransportationRelated Behaviors and Attitudes A Survey of Floridas Aging Road Users Summary
    Transportation-Related Behaviors and Attitudes: A Survey of Florida’s Aging Road Users [Summary]
    Holley, Gail M. ;
    Barrett, Anne
    2022-09-01 | PDF
    The goal of the survey was to help identify transportation issues faced by older Floridians and guide the SMFLC in developing strategies and resources to address these issues. Behaviors and attitudes of interest included use of various transportation options, planning for retirement from driving, self-assessment of driving behavior, and others. The ...
  • Vermont Agency of Transportation 2022 Research Peer Exchange
    Vermont Agency of Transportation 2022 Research Peer Exchange
    Johnson, Katie ;
    Seeber, Kirsten
    2022-09-01 | PDF
    The Vermont Agency of Transportation (Vermont AOT) hosted a virtual peer exchange on June 7, 14 and 21, 2022, to discuss topics related to transportation research with other state departments of transportation (DOTs). The meeting and the subsequent publication of this report fulfill the agency’s obligation to conduct a periodic peer exchange as par ...
  • Virtual Public Involvement VPI Guidance for Encouraging Public Participation and Soliciting Feedback During the Transportation Planning Process
    Virtual Public Involvement (VPI) Guidance for Encouraging Public Participation and Soliciting Feedback During the Transportation Planning Process
    Ashuri, Baabak ;
    Kingsley, Gordon
    2022-09-01 | PDF
    In transportation planning and decision-making processes, public involvement (PI) is critical as the daily users of transportation share useful insights, opinions, and observations on the performance and needs of the transportation systems. Virtual Public Involvement (VPI) is the use of digital technology to engage individuals in project planning a ...
  • Development of Educational Materials for the Public and First Responders on the Limitations of Advanced Driving Assistance Systems
    Development of Educational Materials for the Public and First Responders on the Limitations of Advanced Driving Assistance Systems
    Rahman, Md Ashikur ;
    Mekker, Michelle
    2022-09-01 | PDF
    With the advancement of automated vehicle technologies, it is critical to understand the knowledge gap among drivers on the limitations and safety restrictions of existing advanced driving assistance systems (ADAS), which contributes to dangerous driving habits and misjudgments. For example, some ADAS include adaptive cruise control, but many drive ...
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