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.
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
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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
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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
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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
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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
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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
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United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
2022-09-01
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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
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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
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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
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This report is the response to the North Dakota Legislature's request for a study of the transportation infrastructure needs of all counties, townships and tribes in the state. In 2019, the North Dakota Legislature advanced HB 1066 which had a provision for funding distributions to non-oil producing counties based on the most recent version of this
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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
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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
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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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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
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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
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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
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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
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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
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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
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This project’s two objectives were: 1) Exemplify state-of-the-art SP techniques and recommend the addition of SP experiments to existing surveys to enhance their use for long-term travel forecasts. 2) Provide proof of concept and applicable travel behavior results through the design, deployment, and analysis of an RP-SP survey that concentrated on
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