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.
According to the Texas Department of Transportation Crash Record Information System database, there have been 26,148 crashes involving bicyclists (pedal cyclists) from 2010 to 2018 in Texas, resulting in 2,885 fatalities and suspected serious injuries and 22,937 non-incapacitating and possible injuries. Overall, bicycle crashes, as well as fatal an
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Integral abutment bridges have become popular worldwide by eliminating movable shoes which are expensive to purchase, install, and maintain in conventional bridges. However, the behavior of bridge abutments subjected to air temperature changes for integral bridges is different from that of conventional bridges. Expansion and contraction of bridge g
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Transportation plans must consider the inevitable introduction of new emerging technology and must be able to assess the impacts of proposed transportation policies and large-scale infrastructure projects. To address this need, it is important to incorporate SP questions within travel surveys. This project demonstrated state-of-the-art SP technique
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Understanding which active transportation facilities have a high potential for mode shift is a potent metric of success for funders seeking to make high-impact transportation investments. This report documents the development and validation of a traveler alignment analysis tool that looks at the orientation and magnitude of short trips in origin-de
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Prefabricated Bridge Elements and Systems (PBES) are being more widely used, as they can significantly reduce on-site construction time impacting traffic. The main concerns when using PBES are the final assembly of the elements, type of connection between them, and tolerance to allow for field fit up. The Florida Department of Transportation (FDOT)
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The Bipartisan Infrastructure Law, formally enacted as the Infrastructure Investment and Jobs Act, dedicates $5 billion in formula funding for electric vehicle (EV) charging infrastructure, including $5.6 million for Nevada in fiscal year 2022. The Nevada Department of Transportation (NDOT) has led the development of this Nevada State Plan for Elec
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Asphalt mixtures were collected from seven field projects and distributed to different laboratories to determine their potential for cracking. Samples were prepared in the lab for testing at two conditions: low, in-service temperatures using the bending beam rheometer device based on AASHTO TP-125 and intermediate temperature using the Illinois Fle
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Truck crashes on steep downgrades caused by excessive brake heating is an ongoing concern for the Wyoming Department of Transportation (WYDOT). Crashes resulting from brake failure on downgrades cause a devastating toll on lives and property. To counter such crashes, WYDOT initiated a research project in 2016 to update a previous Grade Severity Rat
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The COVID-19 pandemic led to a significant breakdown of the traditional retail sector, resulting in a substantial surge in ecommerce demand for the delivery of essential goods. The e-retailers coped with this surge in demand, albeit while operating at a much lower level of service than usual, by outsourcing part of their operations through: crowdso
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This report presents the results of a mixed-methods study of the 2020-2022 Oakland Slow Streets program. An official response to the Covid-19 pandemic, the program used signs and temporary barricades to limit thru-traffic on 21 miles of city streets to create more and safer space for walking, cycling, and outdoor recreation. Researchers collected d
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United States. Department of Transportation. Office of the Secretary of Transportation
2022-07-01
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Executive Order (E.O.) 14057 details the President’s bold and ambitious vision for the federal government — using a whole of government approach and the power of procurement to achieve net-zero emissions economy-wide by 2050. Critical goals include transitioning to zero emission vehicles (ZEVs) and energy efficient, net-zero emissions buildings, bo
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This project focused on forecasting freight logistics needs and developing and analyzing capacity plans for the Indiana Department of Transportation (INDOT) to consider. The forecast timeframe ranges from the 2020 to 2045; the commodities considered are those used in the Federal Highway Administration (FHWA) framework. The authors considered five S
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Road salt (NaCl) is used predominantly across the state for winter road anti-icing (as brine) and de-icing (as a solid) operations. Road salt is used because it is inexpensive and effective, but the thousands of tons used annually have resulted in increasing chloride concentrations of surface water bodies throughout Minnesota. In many cases, chlori
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United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
2022-07-01
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In 2020, there were 15,033 (42%) fatal traffic crashes in rural areas resulting in 16,665 (43%) traffic fatalities. There were 20,233 (57%) fatal traffic crashes in urban areas resulting in 21,650 (56%) traffic fatalities. Fatalities in rural areas increased by 2 percent from 16,288 in 2019 to 16,665 in 2020, and in urban areas increased by 9 perce
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2022-07-01
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Domestic Airline Fares Consumer Report
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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
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The objective of this research is to improve and validate the mass concrete thermal management methods (e.g., passive or active cooling) and decision-making tools developed from the Phase I research (Investigation and Guidelines for Mass Concrete Construction Management) against the Georgia Department of Transportation’s (GDOT’s) real-world mass co
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For the 2019-2020 winter season, vehicle-to-everything (V2X) systems using dedicated short-range communications (DSRC) were placed on Utah Department of Transportation (UDOT) snowplows and state routes to test the effectiveness of snowplows requesting signal preemption from traffic controllers. This study was done to understand the impacts and bene
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The U.S. Department of Transportation (DOT) is leading a Safety Data Initiative (SDI), to enhance the analysis and visualization that informs safety policy decisions. Populus was selected to perform analysis and assess the quality of leveraging GPS trip trace data from micromobility operators such as Lime, Bird, and Superpedestrian (LINK), to serve
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This report describes the research efforts aimed at determining the repeatability of the IDEAL-CT test for asphalt concrete mixtures. It follows a series of studies investigating different cracking tests. Three mixes in common production in the northern part of Utah were investigated by three different labs experienced in performance testing. Withi
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In a prior research project (BDK83 977-24), the Financial Achievability Model (FAM) was created for the Florida Department of Transportation Research Center. The Research Center can use the FAM in all phases of research to meet strategic objectives, including demonstrating the potential benefits of proposed projects, allowing for a more cost-effect
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