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.
Connected and autonomous vehicles (C/AV) present the opportunity for momentous and positive changes to most aspects of modern life. When described, the impact to mobility is imagined as safer and more efficient. This comes from the chance to build a self-driving and connected network of vehicles, infrastructure, and supporting data exchanges.... As
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The Highway Safety Manual (HSM), published by the American Association of State Highway and Transportation Officials (AASHTO) provides guidance as to the development of predictive models used to estimate the predicated average crash frequency for a particular site using regression models developed from data for similar sites across a network. These
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Truck tour data are important for understanding freight truck operations and their impacts on the economy, congestion, and sustainability. Tour data capture the movements of trucks as they travel from their depots to make various stops before returning to their depots. Understanding the purpose of these stops (pickup, delivery, rest, etc.) is an es
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The Sidewalking toolkit supports youth mobility and youth agency by sharing effective, design-based strategies for engaging young people in envisioning their own mobility futures. We created this guide to help planners, designers, policymakers, and advocates who are already invested in supporting safe, social mobility options for youth, and who are
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This document is the result of that five-year process, and it is the second version of the research report on the future of airports at the 20- and 50-year horizons. It should be read as a guide to understand the challenges and opportunities ahead. It features tools and technical contents documenting trends and emerging issues. Finally, it contains
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In recent years, camera-based 3D object detection has gained widespread attention for its ability to achieve high performance with low computational cost. However, the robustness of these methods to adversarial attacks has not been thoroughly examined, especially when considering their deployment in safety-critical domains like autonomous driving.
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The primary objectives of this research project involve: (a) forensic analysis of composite deck samples from the I-15 800 South bridge; (b) replication of non-composite specimens for testing; (c) destructive testing of retrofitted non-composite deck samples; and (d) recommended solutions for the repair of bridges affected by debonding of the cast-
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During the 2020 construction season, the Alaska DOT&PF Central Region installed its first application of micro surfacing at 17 locations on Minnesota Drive ramps in the city of Anchorage. This treatment offers the potential to be a more economical solution to the typical mill and fill hot mix asphalt (HMA) treatment used to address rutted roads. Mi
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Work zone intrusions represent a significant safety risk to workers. To help better understand these situations, the Minnesota Department of Transportation partnered with the University of Minnesota to create a method to document intrusion events. This information provides a deeper understanding of the circumstances under which these events occur a
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Permissive left turns, where a driver does not have a green arrow and must wait for a gap in oncoming traffic before turning, can be indicated by different traffic signal configurations. Flashing yellow arrows are becoming a preferred signal type in Minnesota and across the nation. New research provides traffic engineers with confidence that driver
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Recent advances in computer vision techniques have enabled the use of traffic video data for valuable surrogate safety measures to improve highway safety evaluations. However, few tools specifically target abnormal traffic events like wrong-way driving (WWD) or illegal left turns. This research aims to develop a cost-effective video analytic tool,
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UDOT manages statewide above-ground storage tanks to store brine as deicing chemicals for the winter maintenance program. The polyethylene storage tanks will age under UV light, become brittle with low temperatures, creep, and develop cracks. Structural failures of brine tanks will not only impose safety hazards to surrounding tanks and UDOT person
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TDOT’s ITS radar detection system, spanning Tennessee’s urban interstates and highways, faced challenges with data quality and reliability, limiting its potential for advanced traffic management and analytics. This research aimed to enhance the system by standardizing configurations, recalibrating sensors, replacing outdated equipment, and implemen
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Thermal segregation during the construction of asphalt mixtures can result in the formation of low-density areas and a subsequent decrease in pavement life. Although the methods for measuring thermal segregation have remained largely unchanged, significant advancements have been made in asphalt mixture types and design methods over the past decade.
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Smart work zone (SWZ) systems are designed to provide real-time roadway information to better inform motorists, encourage them to take alternate routes, reduce their frustrations, reduce roadway congestion, and enhance safety for motorists and workers. These SWZ systems have been recommended by multiple federal agencies as part of the Intelligent T
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As with any state highway agency (SHA), the construction needs exceed the budget limitations, which mandates that SCDOT prioritizes transportation project needs based on benefit/cost considerations. It is important to use every penny as wisely as possible. In such context, an early-stage cost estimate is imperative for evaluating the feasibility of
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In the face of multifaceted challenges, such as asphalt pavement deterioration and the introduction of new LTPPBind versions, the Indiana Department of Transportation (INDOT) initiated a pivotal research project focusing on three primary areas. First, the study examined the implications of Performance Grade (PG) binder selections on pavement perfor
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Wrong-way driving (WWD) crashes occur when a motorist either inadvertently or deliberately drives in the opposite direction of travel on a divided roadway. For this research project, Texas A&M Transportation Institute researchers assessed the state-of-the-practice regarding WWD detection technology, developed a standardized testing mechanism to ass
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In this project, the team led by Rutgers University's Center for Advanced Infrastructure and Transportation (CAIT), in collaboration with Iteris, Econsult Solutions, Gannett Fleming, and MBO Engineering, completed the construction and application deployment of the New Brunswick Innovation Hub Smart Mobility Testing Ground (SMTG), now named DataCity
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The primary objectives of this research are to: • Assess the feasibility and accuracy of using computer vision technology for performance evaluation at signalized intersections. • Provide intersection video footage data captured by drones. • Use computer vision and artificial intelligence to automatically convert data from video recordings at selec
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