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 Minnesota Department of Transportation (MnDOT)’s 511 Traveler Information System. It describes a concept to improve the provision of traveler information to active transportation users. The concept advocates for the inclusion of traveler information for all transportation modes, emphasizing the needs of active transportation users, including cy
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Minnesota. Department of Transportation. Research Services & Library
2025-06-01
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MnDOT research has developed a modeling tool that identifies the bus route segments that would benefit most from the installation of a dedicated right of way (ROW) for buses. Transit service reliability is one of the most requested service improvements. By implementing a transit ROW where needed most, MnDOT can improve transit reliability and bette
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The primary goal ofTRC2201 was to enhance the durability of asphalt pavements in Arkansas. This was accomplished through two steps: exploring extreme scenarios with lab mixtures and comparing eight field sites. Further analysis was conducted using Pavement ME and a life-cycle cost analysis. In the extreme scenario, air voids decreased as Pb and N l
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The role of vehicle operating speed in traffic crashes is a complex issue, as speeding-related crashes continue to pose significant challenges. Speed greatly impacts both the frequency of crashes and the severity of the resulting injuries. Additionally, excessive speed raises the likelihood of losing control during evasive maneuvers and amplifies c
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This report presents laboratory evaluations of the effectiveness of geosynthetics in stabilizing unbound aggregate layers and develops design guidelines for using geosynthetic-stabilized pavements in Illinois. The research focused on quantifying benefits from geosynthetic mechanical stabilization and incorporating those benefits into pavement analy
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This report describes a screening tool for comparing multi-use trails (MUTs) that could compete for funding from the Virginia Department of Transportation (VDOT) or other state sources. The tool scores, based on selected geographic information system (GIS)-processed factors for which metrics are available by trail segment, are calculated in Excel u
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This Phase II project contained two parts. Part A focused on the investigation of the characteristics and thermal properties of commonly used slags in Iowa cementitious materials and their effects on adiabatic temperature rise (ATR) in Iowa mass concrete structures. A new hydration model for slag-containing cementitious materials and a three-parame
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Alkali-silica reaction (ASR) remains a significant durability concern in concrete pavements, leading to internal cracking, surface deterioration, and loss of ride quality. Although preventive measures have reduced ASR in new construction, pavements built in Minnesota in the 1980s and 1990s continue to exhibit distress. This study evaluates maintena
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We address the problem of coordination and control of Connected and Automated Vehicles (CAVs) in the presence of imperfect observations in mixed traffic environment. A commonly used approach is learning-based decision-making, such as reinforcement learning (RL). However, most existing safe RL methods suffer from two limitations: (i) they assume acc
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This study aimed to propose a performance-based framework to evaluate highly recycled asphalt mixtures containing polymer-modified binders for potential use in a balanced mix design (BMD) specification in the state of Nebraska. For that, loose and compacted mixtures were directly collected from plant and field projects within a benchmarking study,
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A pollinator habitat survey project was conducted in 2023 and 2024 to determine the effectiveness of CTDOT reduced mowing and late season mowing practices in designated conservation areas. The project evaluated the presence of milkweed resources for monarch butterflies and of nectar resources for pollinators in general. The Candidate Conservation A
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Microplastic (MP) pollution has emerged as a critical environmental concern due to its pervasive presence and harmful impacts on human and environmental health. MPs, defined as plastic particles ranging from 1 nm to 5 mm, are problematic because of their ability to disperse widely across ecological habitats. Recent studies have illuminated roadways
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California Partners for Advanced Transportation Technology (PATH) was founded in 1986, as a partnership between the California Department of Transportation (Caltrans) and the University of California. PATH is a statewide research program in Intelligent Transportation Systems (ITS) focusing on improving safety, system performance, accessibility, and
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The California Department of Transportation (Caltrans) owns many medium-to-large equipment yards and maintenance stations. Vehicles are often stored in these fenced and secure yards. However, Caltrans still experiences vehicle component theft from these yards. In recent years, there has been a significant increase in theft at Caltrans facilities. T
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The durability of coastal bridge structures is significantly impacted by the corrosion of steel reinforcement, particularly in waterline pile cap footings exposed to aggressive marine environments. This study investigates the feasibility of using large-diameter glass fiber-reinforced polymer (GFRP) bars as a corrosion-resistant alternative to tradi
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This study documents the historical and current patterns of racial/ethnic residential segregation in Pasadena, examining the role of freeways and other mechanisms in shaping these outcomes. Using quantitative data, this project compares racial segregation in Pasadena with that in the rest of Los Angeles County and analyzes demographic changes in th
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In the Volume 2 report, the bridge-level AI-based maintenance decision policy previously developed in the Volume 1 report is further integrated into a network-level decision support framework, by considering network-level budget and resource constraints. A Pareto Frontier based ranking approach is proposed to rank the maintenance projects suggested
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The Michigan Department of Transportation owns and operates twelve movable bridges, comprised of eleven bascule bridges and one vertical-lift bridge. These bridges often have electrical and mechanical component failures or malfunctions which can cause unplanned maintenance, traffic disruptions, and navigational disruptions. This research evaluates
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Open-Graded Friction Course (OGFC) is a specialized asphalt concrete mixture used for thin-wearing courses, offering significant safety, economic, and environmental benefits. The porous structure of OGFC enhances drainage, reduces hydroplaning, and improves road visibility, particularly during wet weather conditions. Despite its potential advantage
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In 2022, the Virginia Transportation Research Council published Guidance for and Effectiveness of Low-Cost Delineation Treatments, a report that evaluated the effectiveness of several low-cost delineation countermeasures (Flintsch et al., 2022a). That report recommended that the Virginia Department of Transportation (VDOT) consider a pilot study of
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