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 human behavior analysis at toll plazas through driving simulation. The same toll plaza from the first part of the study was modeled in Realtime Technologies Inc. (RTI) SimCreator software. The virtual world created for the simulator was a 600 m by 200 m (1968.5 ft by 656.168 ft) sketch of the West Springfield toll plaza. Five v
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The objective of this study is to improve the durability and to extend the life of AST in Louisiana using rubber-modified asphalt emulsion and using reclaimed rubber in the aggregate layer. Construction methodology, short-term field performance, and cost-benefit analysis will be evaluated.
The purpose of the Data Use Analysis and Processing (DUAP) project is to support the Michigan Department of Transportation (MDOT) and its partners in evaluating uses and benefits of connected vehicle data in transportation agency management and operations. The project complements efforts throughout the transportation community in designing and depl
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Texas Department of Transportation (TxDOT) current practice for field compaction quality control and acceptance for base, subbase and soil layers is to determine the compacted density and sometimes moisture content by nuclear density gauge (NDG). TxDOT has also considered several stiffness-based devices to replace the NDG because stiffness paramete
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A rollover is defined as any vehicle rotation of 90 degrees or more about any true longitudinal or lateral axis, according to NASS CDS. Rollover crashes are still represented highly in terms of frequency and fatalities among Tech Report crash categories. Even though there are various vehicular technical innovations that act as a preventative or pro
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This project explores how different technologies (smart phone, social media, web scrapping) can facilitate a co-productive transportation planning process in a Megaregion. As case studies, GRAs explored bike-sharing planning in NYC, Chicago, Austin, San Antonio and Houston.
Current INDOT policy requires that culvert-like structures with spans greater than 20 ft be treated for purposes of hydraulic analysis as a bridge, and hence mandates the use of software such as HEC-RAS for predicting the headwater, rather than the culvert-specific software, HY-8. In this context, culvert-like structures are assumed to have a stand
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Highway assets, including traffic signs, traffic signals, light poles, and guardrails, are important components of transportation networks. They guide, warn, and protect drivers and regulate traffic. To manage and maintain the regular operation of the highway system, state departments of transportation (DOTs) need reliable and up-to-date informatio
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By evaluating NDE methods for detecting moisture damage in pavements and analyzing the performance and cost-effectiveness of appropriate pavement preservation techniques, the research team will develop a testing protocol for detecting moisture damage in pavements and will recommend cost-effective maintenance and rehabilitation strategies.
2018-07-01
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Domestic Airline Fares Consumer Report
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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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KENTUCKY’S TRAFFIC COLLISION FACTS report is based on collision reports submitted to the Kentucky State Police Records Branch. As required by Kentucky Revised Statutes 189.635, “every law enforcement agency whose officers investigate a vehicle accident of which a report must be made...shall file a report of the accident...within ten days after inve
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In the State of New Jersey, raised pavement markers (RPMs) are used along all centerlines and skip lines, regardless of traffic volume, roadway geometry, or roadway classification. The extensive use of RPMs has raised interest in understanding 1) whether this significant investment generates variant safety benefits at different locations; 2) whethe
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Maintenance management has relied heavily on collecting asset condition information to plan maintenance activities and budget allocation. Data collection is often conducted on a sampling basis because of resource constraints. There is thus a perceived need for the development of an effective sampling framework that can determine statistically repre
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This project evaluated the safety effects of wider pavement markings on rural two lane highways in Idaho using two analyses: 1) Observational Before and After Studies using a before and after comparison group analysis and an Empirical Bayes before and after analysis, and 2) Driver Simulation Based Studies. The study also examined and modeled the de
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Accelerated Bridge Construction (ABC) methods are relatively new in the U.S. and Idaho. ABC requires that bridge precast concrete components be effectively connected to one another in the field. Currently Ultra-High Performance Concrete (UHPC) is used to connect precast bridge deck panels or girders in 6-in. wide closure pours between the precast e
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Cast-in-place (CIP) reinforced concrete (RC) box culverts constitute a large portion of Louisiana’s bridge inventory. Culverts constructed using old detailing standards, especially the ones with lower fill heights, typically produce lower load rating factors when AASHTO procedures are followed. Nevertheless, the performance of these culverts is typ
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This research aimed to better understand 1) whether the significant investment of RPMs in New Jersey generates varying safety benefits at different locations; 2) whether there are alternatives or modifications to the existing RPMs; and 3) how to optimize the installation, monitoring, and maintenance of RPMs and their promising alternatives. This re
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Wisconsin experiences approximately 13 to 55 winter events per year, with annual snowfall ranging from 15 to 132 inches. Wisconsin has traditionally used solid rock salt (NaCl) as the primary deicing chemical in winter maintenance. However, recent changes regarding the use of liquid anti-icing solutions and newer deicing chemicals have raised conce
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Ubiquitous taxi trajectory data has made it possible to apply it to different types of travel analysis. Of interest is the need to allow someone to monitor travel momentum and associated congestion in any location in space in real time. However, despite an abundant literature in taxi data visualization and its applicability to travel analysis, no e
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Assessing the performance of public transit services has long been an important yet challenging issue for transportation agencies and researchers. Transit service performance measurement reflects a very first step towards an efficient and proactive management, where public transit agencies are increasingly pressured to provide high-quality services
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