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.
Recent advances in Unmanned Aircraft Systems (UAS) technologies have tremendous potential of improving the reliability and efficiency of inspections of transportation infrastructures, such as bridges, highways, railroads, construction projects, high mast light poles, etc. Two major challenges in the adoption of UAS operations for NJDOT transportati
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In many cities and towns throughout the United States, citizens with lower levels of education and skill confront challenges when seeking employment. The jobs best suited for their skills may be located in a different part of the metro area from their homes, and the existing public transportation system may not provide them with a practical way of
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The main objective of this study is to evaluate the safety and operational impacts of an innovative infrastructure solution for safe and efficient integration of Automated Vehicle (AV) as an emerging technology into an existing transportation system. Filling the gap in the limited research on the effect of AV technology on infrastructure standards,
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Critical shear stress is the stress exerted by flowing water that initiates soil erosion. It is a required parameter for estimating scour around structures. The current state of practice for estimating critical shear stress in cohesive soils is to assume a minimum value based on experiments with cohesionless, coarse-grained soils. The most accurate
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The main objectives in phase IV of the project were to (1) continue to enhance the visualization and reporting features of the Transit Network Analysis (TNA) software tool, and (2) to ensure that the TNA software tool can be used, modified, and developed by others. To fulfill these objectives, several tasks aimed at incorporating new visualization
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The Florida Department of Transportation (FDOT) has experienced roadway worms, or blistering of flexible pavements, for several decades. A literature review indicated that the distress (also referred to as ripples and distortions) generally occurs due to moisture or other gas-forming substances trapped in between two layers of asphalt concrete (AC)
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The project presents a pavement sensing system along with a list of promising computing models that can be used to predict pavement conditions using a vehicle-based sensing technology. The project started with data acquisition obtained from the previous field data collection followed by a series of data computing using machine learning methods to d
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To cross uncontrolled roadways, where no traffic-halting signal devices are present, pedestrians with visual impairments must rely on their other senses to detect oncoming vehicles and estimate the correct crossing interval in order to avoid potentially fatal collisions. To overcome the limitations of human auditory performance, which can be partic
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Despite growing interest in low-speed automated shuttles, pilot deployments have only just begun in a few places in the U.S., and there is a lack of studies that estimate the impacts of a widespread deployment of automated shuttles designed to supplement existing transit networks. This project estimated the potential impacts of automated shuttles b
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Data communication links are essential components of the ecosystem of intelligent vehicles, enabling autonomous and semi-autonomous driving. Maintaining a reliable, low latency communication link has been a topic of interest in research and product development. The driving force of these developments is a better awareness of the wider surroundings
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Incorporating cracking tests and criteria in binder acceptance, mix design, and construction quality control (QC and quality assurance (QA) offer a way to improve pavement performance. The objective of this research is to identify and, if necessary, refine binder and mixture tests capable of addressing asphalt cracking in Minnesota asphalt pavement
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This report documents the collaboration between ODOT and Bend MPO to develop and execute a nonmotorized traffic data collection program. Using automated technology and data processing techniques, this research demonstrates a least cost path to developing a nonmotorized traffic count program for a small urban community. Data processing techniques ar
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Expanding the deployment of traffic monitoring systems and information transmission is a crucial step toward increasing the efficiency, reliability and safety of vehicular transportation. In this project, the authors present a real-time data analysis system for aerial LiDAR roadway vehicle detection as an option for expanding traffic monitoring. Th
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Many factors affect pavement compaction quality, which can vary. Such variability may result in an additional number of passes required, extended working hours, higher energy consumption, and negative environmental impacts. The use of Intelligent Compaction (IC) technology during construction can improve the quality and longevity of pavement struct
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Georgia has numerous protected freshwater species, which means that the Georgia Department of Transportation (GDOT) must frequently consult with federal and state agencies to identify measures to avoid, minimize and mitigate impacts to imperiled aquatic organisms. Some of these measures, such as restrictions on in-water work during the reproductive
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Communications between vehicles is one of the most important prerequisites for inter-vehicle coordination, a key feature needed to enable autonomous and semi-autonomous driving, from an efficiency, convenience and safety perspective. Such communication will have to be done with very low latency, which lead the industry into looking at mm-wave bands
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To better assess the state of workforce diversity and opportunities to address diversity challenges, TDOT issued a research contract to the University of Memphis (with subcontracts to Tennessee State University and Vanderbilt University) in December 2018 to examine these issues. The focus of this research was to assess TDOT’s goals, challenges, and
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Georgia has numerous protected freshwater species, which means that the Georgia Department of Transportation (GDOT) must frequently consult with federal and state agencies to identify measures to avoid, minimize and mitigate impacts to imperiled aquatic organisms. Some of these measures, such as restrictions on in-water work during the reproductive
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Automated vehicles (AVs) promise to revolutionize driving safety. Driver models can aid in achieving this promise by providing a tool for designers to ensure safe interactions between human drivers and AVs. In this project, we performed a literature review to identify important factors for AV takeover safety and promising models to capture these fa
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Georgia has numerous protected freshwater species, which means that the Georgia Department of Transportation (GDOT) must frequently consult with federal and state agencies to identify measures to avoid, minimize and mitigate impacts to imperiled aquatic organisms. Some of these measures, such as restrictions on in-water work during the reproductive
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