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 investigated several aspects related to work zone safety. First, it examined the accuracy of the information recorded in the South Carolina (SC) traffic collision report forms (TR-310). A total of 200 fatal crashes in work zones between 2014 and 2020 were examined to determine how many discrepancies exist between the written narrative
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New technologies are being added to vehicles at a growing rate to assist drivers and even fully take over the driving task in some situations. These technologies are generally camera-based and typically rely on pavement markings to maintain vehicle position and navigate the roadway. As drivers become more reliant on these systems, and for these sys
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It is widely accepted that road traffic safety is a significant public health issue. One of the effective ways to improve road traffic safety is analyzing crash data to understand where traffic accidents occur, identify associated spatial and temporal patterns, and determine causation. In the State of New Mexico, locations of traffic accidents are
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Construction sites rely on erosion control practices to protect bare slopes and prevent soil loss. This study used large scale rainfall simulators to evaluate various erosion control methods used by the Alabama Department of Transportation (ALDOT) on construction sites. The study included the construction of 12 rainfall simulators at the Auburn Uni
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This project investigated a new seismic retrofitting technique for bridge column-footing substructure components considering the influence of soil-structure interactions (SSI). The seismic retrofitting technique uses titanium alloy bars to provide both confinement of the concrete column and a supplemental flexural tension load path. Laboratory and
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Suburban areas have lower density development than urban areas, which may make them less accessible for the growing population of low- and moderate-income suburban residents, particularly those without a personal vehicle. This research examines factors that lead these households to move to suburban areas and identifies accessibility barriers they f
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Located within the seismically active Pacific Ring of Fire, California's transportation infrastructure, especially in the Bay Area, is susceptible to earthquakes. A review of current research and stakeholder interviews revealed a growing awareness of emergency preparedness among local jurisdictions and transit agencies in recent years. However, man
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This study examined the operation of static and dynamic no right turn on red (NRTOR) signs at eight signalized intersections in Minnesota (six dynamic and two static). Driver compliance with the NRTOR indications were measured using video data. Most dynamic NRTOR sign locations were pedestrian-activated, with one location having additional time-of-
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Hot-mix cold-laid (HMCL) asphalt mixes are crucial for maintaining asphalt pavements via blade-on/level-up patching. While the Superpave Gyratory Compactor (SGC) is widely used for hot-mix asphalt mixes due to its adjustable parameters and manageable compaction densities, the HMCL mix design still follows the Hveem mix design method, as per the Tex
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The objective of this study is to explore the feasibility of using Ultra-High Performance Concrete (UHPC) in a bridge link slab for the purpose of producing crack-free continuity detail. This new link slab detail will employ a UHPC mix design that is suitable for Louisiana.
Tendon forces are fundamental to the performance of post-tensioned (PT) bridges. Therefore, monitoring tendon forces is important for understanding the health of PT bridge elements and evaluating the condition of prestressing strands. Implementing a reliable method to monitor PT tendons during the service life of the structure, however, is a challe
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The main objective of this study was to independently evaluate the reliability and repeatability of a tension test method for ultra-high performance concrete (UHPC) developed by the Federal Highway Administration (FHWA) and adopted by the American Association of State Highway and Transportation Officials (AASHTO) as AASHTO T 397.
In the proposed third phase of the NJDOT Automated Traffic Signal Performance Measures (ATSPM) project, the research team 1) evaluated Roadside Unit (RSU) /Onboard Unit (OBU) data with ground truth data, 2) validated physical and virtual RSU deployment scenarios for pedestrian safety applications, 3) studied the boundary conditions of Light Detecti
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Traffic signal performance measurement and visualization provide insights as operational tools to help traffic management centers get more benefits from infrastructure investment. ATSPM system uses high-resolution (0.1 sec) data to support the data-driven decision-making process and allows consistent and dynamic monitoring of signal-controlled inte
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This report summarizes the research work that was completed to: 1) assess the effects of the properties of the aggregates, binders, RAP, and asphalt mixtures on low-temperature cracking resistance of mixes used on local roads, and 2) develop recommendations and specifications for designing low volume pavements that are more resistant to low-tempera
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This report summarizes the research work that was completed to: 1) assess the effects of the properties of the aggregates, binders, RAP, and asphalt mixtures on low-temperature cracking resistance of mixes used on local roads, and 2) develop recommendations and specifications for designing low volume pavements that are more resistant to low-tempera
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State departments of transportation (DOTs) are embracing the use of clean energy and connectivity (CEC) applications along publicly owned right of way (ROW). Applications such as wind and solar power installations, broadband lines, small cell wireless equipment, electric vehicle charging stations, and technologies related to connected and automated
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In this study, a driving simulator experiment was designed to assess driver distraction caused by roadside projects involving Unmanned Aerial Systems (UASs) and Under-Bridge Inspection Trucks (UBITs). The primary goals were to determine which scenario caused more distraction for drivers under various conditions, such as different UAS sizes, traffic
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This paper aims to synthesize the literature on the application of artificial intelligence (AI) for airports. The selected methodology was based on the PRISMA Extension for Scoping Reviews (PRISMA-ScR), a recognized framework for systematic reviews. Authors searched the Scopus and Web of Science databases for articles that met the following criteri
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