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.
Truckers often struggle to find parking to take legally required breaks, which is not only an inconvenience for drivers, but also poses a safety risk for the motoring public. MnDOT is testing a detection system to identify the number of available truck parking spaces at the Heath Creek Rest Area (Northbound) located at M.P. 68.1 North of Faribault
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The Alabama Department of Transportation (ALDOT) is currently using the Alabama Design and Analysis of Pavement Thickness (ADAPT) software for their structural pavement design process, which is based on the 1993 American Association of State Highway and Transportation Officials (AASHTO) Pavement Design Guide. In 2008, the American Association of St
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Despite recent changes to MnDOT mix designs, transverse cracking has still been observed shortly after the bridge deck is poured. The goal of this research was to determine the causes of this cracking and to propose deck reinforcement or mix design practices that efficiently mitigate the problem. Initial investigations focused on synthesizing exist
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The objective of this project is to develop knowledge, tools, and protocols to inform best practice standards for effective implementation of biochar in bioretention systems (BRSs) for treating roadway runoff. This project will be performed in two phases, with the first phase (this report) focusing on biochar production, characterization, and conta
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The objective of this research was to determine the efficacy and cost-effectiveness of the application of tire-derived aggregate (TDA) in stormwater treatment and management systems. We reaffirmed that TDA is an excellent means of retaining phosphate (soluble reactive phosphorus) in stormwater runoff. In addition, we found that biofilms grow on TDA
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This research examined the service and ultimate behavior of bridge bent-to-column connections in Texas Department of Transportation (TxDOT) substructures to develop design recommendations for improved structural resilience under extreme events, including flooding, vehicular collision, and loss of column. A three-phase approach was employed. First,
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The Florida Department of Transportation (FDOT) has several managed lane facilities throughout the state. Managed lanes (MLs) are commonly constructed adjacent to general-purpose lanes (GPLs) to improve mobility. The objective of this research was to understand driver behavior on managed lane facilities, specifically pertaining to the type of separ
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As transportation systems incorporate computing technology, cybersecurity risks have grown. This project, in collaboration with the Florida Department of Transportation (FDOT) and the Traffic Engineering Research Laboratory (TERL), aims to enhance the security of traffic controllers and related infrastructure by identifying vulnerabilities, develop
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This research examines public satisfaction with winter road maintenance (WRM) and transportation behaviors during snow events in Utah, with the goal of informing more transparent, responsive, and data-driven strategies and public communication. A detailed online survey of 568 residents across six distinct geographic zones captured public perception
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This report examines some of the economic and real estate impacts of Connecticut’s CTfastrak and Hartford Line transit systems through a multi-phase, data-driven study. Findings reveal evidence that proximity to transit stations is associated with increased property values, higher property tax revenues, reduced residential and commercial vacancies,
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Research was undertaken to determine the effectiveness of various speed warning technologies across a variety of critical speed-change contexts in order to provide guidance to support future installation and operation of such treatments in Michigan. The speed warning technologies evaluated in this research included dynamic speed feedback signs (DSF
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Departments of Transportation need measurement tools to (1) assess and track over time populations and geographies where mobility investments are needed, (2) assess what is driving the mobility needs of different populations and geographies so as to identify possible interventions, and (3) evaluate the impact of department investments on mobility.
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Roadside vegetation composition assessment is essential to maintain ecological stability, control invasive species, and to ensure the adoption of environmental regulations around construction zones. Traditional monitoring methods involving visual inspections are time-consuming, labor-intensive, and not scalable. Remote sensing offers a valuable alt
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Temporary bridges are systems designed for an expected service life of 5 years. In 2011, the California Department of Transportation issued a memo to designers advocating the use of design spectra corresponding to a return period of 100 years for temporary bridges. However, broad consensus on the most appropriate hazard level and design approach is
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This project investigated the use of evolving machine vision technologies to improve asset management procedures. Machine vision is technology that enables machines to “see” and interpret images, similar to how humans see and understand the world. It includes capturing an image, analyzing the image, and then completing and action or decision based
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MaineDOT has a family of transit plans that have been developed over the past five years through collaborative efforts with partners and stakeholders. These plans share similar themes, guidance, and recommendations and tie into the Department’s Long-Range Transportation Plan, which was completed in 2023. This report complements those plans, reviewi
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This study developed a data-driven geospatial tool to optimize emergency response strategies for vehicle crashes in Kansas. The tool analyzed more than a decade of crash data from the Kansas Department of Transportation (KDOT) and the Fatality Analysis Reporting System (FARS) to provide insight into T1 (crash to emergency medical services [EMS] not
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This study developed a data-driven geospatial tool to optimize emergency response strategies for vehicle crashes in Kansas. The tool analyzed more than a decade of crash data from the Kansas Department of Transportation (KDOT) and the Fatality Analysis Reporting System (FARS) to provide insight into T1 (crash to emergency medical services [EMS] not
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Open-graded friction course (OGFC) is a thin asphalt mixture surface layer. It is gap-graded with a high percentage of coarse aggregates that are nearly uniform in size, resulting in a high percentage of interconnected air voids and asphalt binder, which provides improved skid resistance, visibility, and decreased pavement-tire noise. However, cons
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