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 document is a task report for a larger Wildlife Vehicle Collision (WVC) Reduction and Habitat Connectivity pooled fund study. It addresses the potential use of passive use economic values for wildlife to inform the mitigation of wildlife vehicle collisions. Passive use, also known as non-use values, are the values individuals place on the exis
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The 2017 NJDOT Peer Exchange was held on October 3-5th in Trenton, New Jersey. The panelists included state DOT UAS leaders from Delaware, Kansas, Massachusetts, New Jersey, North Carolina, and Pennsylvania, as well as UAS leaders from the FAA, New Jersey State Police, and the NJ State Forest Fire Service. The Peer Exchange was intended to share UA
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The Florida Department of Transportation (FDOT) recognizes that changes in demographics, economics, technology, the environment, and global issues will create planning risks for Florida’s transportation system. In preparation for the 2020 update of the Florida Transportation Plan (FTP), FDOT contracted Florida State University’s Barnebey Planning &
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This Phase II report reports on an extensive data collection process that led to the development of a robust database of 133 overlaid bridge decks after verification of historical inspection reports, verification of as-built plans and communication with VDOT district bridge engineers. This helped in developing a model for understanding the amount o
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The objective of the survey summarized in this report was to establish a statewide safety belt usage rate in Kentucky for 2019. This rate can be compared to those determined from previous surveys. The 2019 statewide survey documents the continued effect associated with law enforcement, related education, and general public attitude.
In today’s fiscally constrained funding environment, cost efficiency in highway construction and maintenance is an important goal for transportation agencies nationwide. This research study estimated the average cost per-lane mile for roadway construction projects on State-owned roadways during a four-year analysis period; benchmarked New Jersey ro
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Independent navigation through unfamiliar indoor spaces is beset with barriers for blind and visually impaired (BVI) individuals. A task that is spontaneous for people without disabilities has to be planned and coordinated with other individuals for the BVI population. Currently, there are no commercial systems that enable BVI users to independentl
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University of South Florida researchers surveyed all MPOs in the state of Florida and most of the local transit agencies to examine the current state of planning coordination between them regarding LRTPs and TDPs.
Pressure grouting beneath the tip of drilled shafts, also known as postgrouting, has been used for more than fifty years throughout the world and has been shown to be an effective means to enhance both the usable and ultimate end bearing resistance. In short, postgrouting is a form of compaction grouting beneath the shaft tip (performed after concr
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The sinkhole associated with the Napoleonville salt dome in Assumption Parish, Louisiana, near Bayou Corne, threatened the stability of Highway 70–a state-maintained route. In order to mitigate any potential damaging effects to the highway and address issues of public safety, a program of monitoring, decision support, and research was implemented t
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This manual provides guidance for methods of evaluating projects to assess the potential of encountering acid-generating materials in northern Minnesota. Methods for field reconnaissance, preliminary testing, characterization sampling efforts, interpretation of results, approaches for mitigation, and approaches for project monitoring are included.
Traffic loading is one of the key inputs for the structural design and analysis of pavement structures using both the AASHTO Guide for Pavement Design (1993) and the Pavement Mechanistic-Empirical Design (PMED) Guide. Traffic data provides necessary information in terms of traffic load distributions, intensity and number of repetitions. PMED requir
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Traffic signals on four-lane divided signalized arterials impair mobility and exacerbate traffic congestion, driver frustration, crash risk, and overall user and community costs. This study examined the economic feasibility of converting this roadway type to free- flow corridors. A free-flowing facility does not refer to a freeway, but rather, a fa
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With increased interest in Pedestrian Hybrid Beacon (PHB) use across the United States, including in Illinois, it is necessary to provide a comprehensive analysis for PHB application nationwide, including current control standards, practice experience, and concerns in all states. Thus, using the official documents of each state and additional infor
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Bridge prefabrication minimizes on-site operations and closure times, and can also contribute to improving the quality and durability of bridge elements as well as reducing the environmental impact of bridge construction. To date, bridge prefabrication has mainly focused on superstructure elements. The use of prefabricated substructure elements can
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The ability to inspect reasonably and ensure the durability of hybrid composite beams (HCBs) is of concern to transportation agencies. In case of infiltration of chloride-laden water through the fiber-reinforced polymer (FRP) shell of an HCB, tension reinforcement strands in the bottom flange will be subject to corrosion, thus severely affecting th
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The Canadian Crown of the Continent (CCoC) is one of three zones where wolverines can move between Canada and the US, providing the last links for recruitment and ultimately gene flow to the highly fragmented population in the US Rocky Mountains. However, a combination of rapidly expanding logging, energy development and motorized recreation, along
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In prestressed bridge girders, end region reinforcement is used to control cracking caused by high tensile stresses that occur due to prestress transfer. Partial strand debonding and additional mild steel reinforcement are commonly used to control end region cracking. In some cases, these measures do not effectively control cracking, resulting in c
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The Highway Safety Improvement Program (HSIP) aims to reduce the number and severity of fatalities and serious injury crashes on all public roads by implementing highway safety improvement projects. Over the last few years, particular emphasis has been placed on employing advanced safety predictive methods and tools.
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