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 report presents the findings of research on traffic monitoring programs undertaken for TDOT’s Long Range Planning Division by Tennessee Technological University’s Civil and Environmental Engineering Department. The primary purpose of the research was to determine best practices for a traffic monitoring program based on an in-depth review of th
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The present STIC effort takes advantage of new innovative solutions developed through extensive research at IIHR-Hydroscience and Engineering (IIHR), at the University of Iowa. Implementation of the one of the developed self-cleaning designs at one of the existing culvert sites (through retrofitting) has demonstrated its operational capabilities as
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Concrete infrastructures in cold areas such as South Dakota tend to experience early deterioration that is mostly triggered by steel corrosion. The corrosion is initiated by chloride penetration through cracks in the concrete. Fiber reinforced concrete (FRC) is known to be a good alternative to conventional concrete in cold areas due to its enhance
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The objectives of the proposed research were: (1) to evaluate whether the residual trapped moisture in warm mix asphalt (WMA) mixes affects the tensile strength ratio (TSR) test results, and investigate if the curing of compacted specimens is required for WMA mixes that is different from the hot mix asphalt (HMA) mixes; (2) to evaluate the stiffnes
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This report covers the period October 1, 2016 through September 30, 2017. The Center was established by the authority of FAA solicitation 13-C-AJFE-Solicitation. During that time the ASCENT team launched a new website, which can be viewed at ascent.aero. The next meeting will be hosted by the Massachusetts Institute of Technology, April 3-4, 2018 i
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Past research efforts have used a wide variety of methodological approaches to analyze pavement performance indicators, pavement rehabilitation treatments, and pavement service life. Using big data informatics methods, the intent of this study is to conduct a detailed, statistical assessment of pavement rehabilitation treatments by PPP type, by stu
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This report summarizes the results from Phase 2 of the ground penetrating radar (GPR) technologies evaluation performed by the Transportation Technology Center, Inc. at the revenue service monitoring sites on the Union Pacific Railroad and Amtrak. The scope of work included evaluation of ballast fouling and moisture sensitivity of two commercial GP
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Polymer overlays and penetrating deck sealers are used as preventive maintenance options to extend the service life of concrete bridge decks. Overlays and sealers protect concrete structures from deterioration by inhibiting the ingress of chlorides, chemicals, and moisture and by slowing active corrosion. Identifying the optimum time for installati
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This document contains data on the reliability and effectiveness of an animal detection system along U.S. Hwy 95 near Bonners Ferry, Idaho. The system uses a Doppler radar to detect large mammals (e.g., deer and elk) when they approach the highway. The system met most of the suggested minimum norms for reliability. The total time the warning signs
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The Florida Department of Transportation (FDOT) manages runoff with best management practices (BMPs) in their right-of-way (onsite) to meet regulatory requirements for removal of nitrogen and phosphorus. In some situations, runoff water from outside the right-of-way (offsite) may be present. FDOT has an option to treat offsite runoff in an onsite f
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The University of Florida (UF) and its Transportation Institute (UFTI), the Florida Department of Transportation (FDOT) and the City of Gainesville (CoG) are cooperating to develop a smart transportation testbed on the University of Florida (UF) main campus and adjoining city streets. As part of this effort, the research team reviewed the state-of-
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Claiming over one million lives a year around the world, road traffic fatality is a major global public health concern (WHO, 2013). For this reason, several international institutions including the Organization for Economic Cooperation and Development (OECD), the World Bank, and the World Health Organization (WHO) closely track road fatality trends
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This document presents guidelines for the selection of snow and ice control materials for winter weather roadway maintenance applications in Texas. The purpose of this document is to provide Texas Department of Transportation (TxDOT) roadway maintenance professionals with the information they need to know in order to procure, apply, and otherwise i
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This document presents guidelines to facilitate the evaluation of brines for winter weather roadway maintenance applications in Texas. Brines are used in anti-icing applications which typically consist of placing liquid snow and ice control chemicals onto the roadway surface prior to the storm event. These chemicals depress the freezing point and p
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This project sought to understand the causes of the recent downturn in vehicle miles travel (VMT) in the United States, a phenomenon that has been labeled “Peak VMT” or “Peak Travel.” Peak VMT is important because transportation funding mechanisms are strongly tied to VMT levels where fuel tax revenues are directly impacted by driving levels and ve
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This document describes the approach to be taken by the Texas A&M Transportation Institute Connected Vehicle Pilot Deployment(CVPD) Evaluation Team, the Independent Evaluator of the Connected Vehicle Pilot Deployments, for assessing stakeholder acceptance/satisfaction associated with the CV Pilot Deployments. For the purposes of this document, a st
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The objective of this research study was to review and analyze the system failure observed during crash testing of an increased span length for the Midwest Guardrail System (MGS) long-span guardrail system in test no. MGSLS-2. Test no. MGSLS-2 was a full-scale crash test conducted on the MGS long-span guardrail with a span length of 31¼ ft (9.5 m).
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The Florida Department of Transportation (FDOT) collects pavement condition and performance data each year, using both site-specific equipment that requires temporary traffic control (TTC) operations (either moving or closed operations) and full-sized survey vehicles that run at highway speeds. While many safety features have been implemented in th
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This operational concept report provides an overview of the Mobility on Demand (MOD) concept and its evolution, description of the MOD ecosystem in a supply and demand framework, and its stakeholders and enablers. Leveraging the MOD ecosystem framework, this report reviews the key enablers of the system including business models and partnerships, l
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The Texas High-Speed Rail (HSR) is an unprecedented US project proposed by a private company. This project has many uncertainties because it will be funded only by the private sectors and it is the first US HSR project using foreign technology. The HSRs are huge and complex systems involving political, economic and sociotechnical issues that are af
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