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.
Distracted driving is a significant contributing factor to motor vehicle crashes. Cultural-based strategies seek to change the behaviors of individuals by connecting their social identity to nested layers of relationships. Relationships between family members or between supervisors and employees provide opportunities to reduce distracted driving. T
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The deployment of autonomous vehicles (AVs) has been troubled by the soaring cost of operations and the public’s concerns about the safety and fairness issues potentially brought by the new mobility. As leading companies such as Waymo and Uber which have obtained permits to commercialize their robotaxi fleets domestically and overseas, it is urgent
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The North Carolina Department of Transportation (NCDOT) modified the procedures for asphalt mixture design in 2018 in part, to increase the asphalt content and address observed cracking issues with asphalt mixtures. These changes have reduced the number of asphalt mixture types, changed compaction levels and the volumetric limits for some mixtures,
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Highway work zones can be dangerous and unpredictable. Between 2003 and 2017, over 1,800 workers died on road construction sites. Eliminating injuries and deaths requires state transportation agencies to adopt robust safety cultures as there is a clear relationship between these cultures and worker behaviors. The Kentucky Transportation Cabinet (KY
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As aggregate resources are depleted, there is a need to turn to more sustainable resources and alternatives to virgin aggregate for pavement preservation treatments. A recent NAPA survey (Williams et al., 2019) shows more RAP is stockpiled in Ohio than any other state, with a total of 11.2 million tons of RAP in 2018. Given the large quantities of
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Public roads, streets, and sidewalks are managed by the City of Pittsburgh and those public space are used by all residents. The Department of Mobility and Infrastructure (DOMI) is responsible for issuing and enforcing permits for occupancy of the public right-of-way (ROW) in the City of Pittsburgh, such as for construction projects and utility lin
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The COVID-19 pandemic dramatically affected transportation systems, including the ability of localities to pay for them. The authors explore the effects of the pandemic and the associated economic turbulence on local option sales taxes (LOSTs), an increasingly common revenue source for transportation in California and across the U.S. LOSTs have man
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The Indiana Department of Transportation (INDOT) manages and maintains over 28,000 miles of roadways. Maintenance of the roadways includes pavement repair in the summer and snow removal and de-icing in the winter. The prioritization of assets during winter storm events is crucial and impacts travel and safety. The objective of this project was to i
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Super 2 corridors with passing lanes provide operational benefits to traditional two-lane highways by creating passing opportunities and reducing delay and crashes, leading to increased use of Super 2 corridors across Texas. However, as more passing lane length is added to a Super 2 corridor, the more it may resemble a traditional four-lane alignme
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Minnesota’s Office of Civil Rights at the Minnesota Department of Transportation administers the Disadvantaged Business Enterprise (DBE) program. The DBE program is intended to remedy past and current discrimination against disadvantaged business enterprises, ensure a level playing field and foster equal opportunity in DOT-assisted contracts, impro
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The COVID-19 pandemic has drastically disrupted transit operations and induced significant transit ridership losses worldwide. Given its unprecedented duration, magnitude, and scale, the long-term effects are still unclear. Despite the differences, we can learn from previous disruptive events, such as terrorist attacks and epidemics, in the past 30
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In an effort to manage increasing pollution and congestion in cities, regions, and megaregions around the world, governments have implemented various types of driving restriction programs. This report examines the effects of these restrictions and is divided into two chapters. The first provides a critical review of the literature on license-plate-
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Rapid transit systems are critical components of public transportation networks in urban areas, in terms of their impact on person mobility and on monetary, energy, and environmental costs associated with their operations. To facilitate effective planning for current and future needs, a framework is required that provides important consumption metr
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The Northeast Megaregion Travel Demand and Investment (NEMR TD&I) Model is a standard 4-step travel demand model that brings together population and job forecasts for 2030 and 2040 with detailed highway and public transportation network data across the 13-state Northeast Megaregion to help transportation planners evaluate the demand for new transpo
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In today's competitive job market, local agencies need to grow their employee pipeline through various outreach strategies. This toolkit is intended to help broaden the reach and impact of job postings to ensure that local agencies are developing and marketing an exciting and desired career option. This toolkit includes sample job descriptions, tip
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An overall project was initiated to determine whether the use of micro-silica slurry as a supplementary cementitious material was significantly beneficial at creating a low permeability corrosion-resistant concrete, particularly from the inspection of the old parking garage at the Salt Lake City Airport. This report outlines the initial visual and
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Accurate joint transverse faulting prediction is essential for proper pavement design. Departments of transportation are encouraged to evaluate, recalibrate, and even modify the faulting model if discrepancies between predicted and field measured faulting are observed. The Pennsylvania Department of Transportation (PennDOT) identified a series of p
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This report is written to summarize the findings of a study conducted by George Mason University’s (GMU) Sustainable Geo Infrastructure (SGI) Research group to evaluate the expansion of using reclaimed asphalt pavement (RAP) and to optimize the RAP content in unbound base aggregate. The particular scope of the research presented in this report has
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In 2018 the Utah Department of Transportation (UDOT) funded a study in which data were collected to evaluate performance measures for UDOT’s Incident Management Team (IMT) program. Afterwards, UDOT received funding to expand the size of the program. Additionally, TransSuite, a data source used by the UDOT Traffic Operations Center to log incident-r
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An agent-based, multichannel simulation of a downtown area reveals the impacts of both redistributing traffic demand with time-dependent congestion pricing, and supplying extra capacity by banning left turns. The downtown street network was idealized, and loosely resembles central Los Angeles. On the demand-side, prices were set based on time-of-da
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