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.
This project explores the potential re-use of waste materials/by-products as a soil amendment in northeastern Minnesota. The project team identified 23 waste/by-products and collected 15 of but only analyzed 11 because of the possible content of persistent chemicals in some of the materials or the unwillingness of the owner to participate. Peat scr
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GDOT AASHTOWare is currently used to gather information about the sample data, which includes all the details of the samples, such as the basic sample data, contract information, testing status, and results. GDOT wants a mobile app that allows the user to create a new sample, enter the basic sample information on the mobile phone, and send this to
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Each year construction events occur on interstates and highways to repair the road network. To perform these activities a work zone, or a temporary closing of a lane or shoulder, is required. However, work zones can have significant impacts on traffic flow, especially during peak travel times. To mitigate the impact of work zones, the Kansas Depart
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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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From fender-benders to more serious incidents, crashes are the primary source of nonrecurring congestion on Florida roadways. Vehicles that stop or slow down because of a crash not only block traffic flow, they can also cause secondary crashes, further complicating the crash scene and increasing congestion. Predicting when a secondary crash might o
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Transit agencies are increasingly using commercially available software platforms to assist in their service planning. These platforms vary in their applications, functionalities, and capabilities, among others. This project includes three focuses: (1) identifies and evaluates existing software platforms used by transit agencies for transit service
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California has set a goal of reaching 100% zero emission vehicle (ZEV) sales by 2035. Most ZEV sales to date have been battery electric vehicles (BEVs) or plug-in hybrid electric vehicles (PHEVs), while fuel cell electric vehicles (FCEVs) make up only a small portion of ZEV sales. The market for FCEVs may be partially constrained because, unlike BE
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The objectives of this study were to develop deterioration curves for state-owned bridges in Missouri, study certain parameters that affect structure deterioration, and develop recommendations for cost effective designs. The study used inspection history data stored in the National Bridge Inventory (NBI). NBI data from 1983 through 2019 was used to
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Because road user behavior is a common factor in traffic crashes, we must explore ways to encourage safer behaviors. Traffic safety culture recognizes that intentional behavior is influenced by the values, beliefs, and attitudes shared among a group of people. Therefore, to change behavior within a group, it is necessary to change beliefs. However,
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Introduction: The biennial Aerospace Medical Certification Statistical Handbook reports descriptive characteristics of all active U.S. civil aviation airmen. The 2020 handbook documents the most recent and most widely relevant data on active civil aviation airmen.Methods: Medical certification records from 2015–2020 were selected from the Document
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Public transportation plays a fundamental role in the livability of communities of all sizes. The Rural Transit Fact Book provides information on transit service availability and cost to help the transit industry in the United States provide efficient and effective service to meet rural community mobility needs. Financial and operating statistics c
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During the COVID-19 outbreak, serious concerns were raised over the risk of spreading the infection on public transportation systems. As the pandemic recedes it will be important to determine optimal timetable design to minimize the risk of new infections as systems resume full service. In this study, the authors developed an integrated optimizatio
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This report examines transportation in California: where we are today, how we got here, and where we might be headed. We begin with facts on travel and transportation systems in California today. The vast majority of personal travel is by car across all socio-economic groups, and commercial travel is by truck. Public transit plays an important role
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This study presents the results of an analysis on the impact of increased law enforcement on truck driver-at-fault crashes and identifies corridors that would make viable candidates for the Oregon MCSAP program. This was accomplished through a descriptive analysis of collected inspection data and Oregon crash data. Next, the safety performance of t
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The Fiscal Year 2022-2026 U.S. Department of Transportation Strategic Plan establishes the U.S. Department of Transportation’s (U.S. DOT) strategic goals and objectives for Fiscal Year (FY) 2022 through FY 2026. It comes at a critical time for U.S. DOT and the nation. As a country, we face enormous challenges—a global pandemic, systemic inequality,
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A large portion of transportation corridor projects use lime and other calcium-based stabilizers to reduce soil plasticity, increase shear strength, reduce compressibility, and reduce volume changes when subjected to variations in water content. While design and construction practices for subgrade stabilization have been standardized, there is no e
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The objective of this research is to provide guidance to project stakeholders for the sequencing and placement of noise walls and retaining walls. The research included examining noise and retaining wall selection, standards and specifications, preferred methods and best practices for sequencing and placement, and design and construction procedures
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Modifying asphalt binder is one of the primary methods of improving the performance of asphalt mixtures; the benefits include improved rutting resistance, cracking resistance, increased durability and stripping resistance. The addition of polymer, such as styrene-butadiene-styrene (SBS), is the most common method of modifying asphalt binders; howev
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The purpose of this project was to install several sections of high density polyethylene (HDPE) pipe for initial and long-term evaluation. Three sections of pipe were installed. Two sections of 24-inch diameter and one section of 30-inch diameter pipe were installed during the reconstruction of K-66 between Riverton and Galena, Kansas. The pipes we
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The Little Roady Autonomous Vehicle (AV) shuttle pilot was coordinated by the Rhode Island Department of Transportation and consisted of a free daily shuttle service operated from May 2019 through June 2020 along a twelve-stop, 5.3-mile loop along the Woonasquatucket Corridor in Rhode Island. Key goals of the Little Roady project were to safely int
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