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.
United States. Joint Program Office for Intelligent Transportation Systems
1997-11-01
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The U.S. Department of Transportation (USDOT) is embarking on a new program called the Intelligent Vehicle Initiative (IVI). The USDOT intends to jointly define the program plan and conduct the IVI in cooperation with the motor vehicle, trucking, and bus industries, state and local governments, and other stakeholders to facilitate the research, dev
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This report summarizes four research reports completed as part of a study focusing on improving safety at highway-railroad grade crossings. The objective of this research was to develop, test, evaluate, and recommend improved methods for communications with drivers at both active and passive highway-railroad grade crossings.
The upgrading and widening of highways over the state, especially in urban areas, are causing the directly affected businesses and property owners to inquire about the possible negative economic impacts of such construction. This paper documents the during-construction effects of widening a 3.5 km (2.2 mi) section of U.S. 59, in Houston, Texas, fro
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Project 187.9 involved the continued monitoring of pavement test sections. The objective of this project has been to monitor seal coat test sections which were set up in Project 1222. Monitoring of each site included a visual survey, photographic records, texture readings, frictional, readings, and maintenance of the data base. The texture values a
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To answer questions being raised by abutting residents and businesses about proposed elevated and/or depressed freeway improvements in the urban and suburban areas of Texas, a four-year study has been conducted to estimate the social, economic, and environmental effects of such freeway designs. Eight existing, two under construction, and one approv
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This report evaluates the operation of freeway high-occupancy vehicle (HOV) lanes in Texas through calendar year 1995. As of the end of 1995, HOV lanes were in operation on the five following Houston freeways: 1) Katy Freeway (1-lOW); 2) North Freeway (l-45N); 3) Northwest Freeway (U.S. 290); 4) Gulf Freeway (l-45S); and 5) Southwest Freeway (U.S.
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To answer questions being raised by abutting residents and businesses about proposed elevated and/or depressed freeway improvements in the urban and suburban areas of Texas, a four-year study has been conducted to estimate the social, economic and environmental effects of such freeway designs. Eight existing, two under construction and one approved
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Safety of work zones is a major area of concern since it is not always possible to maintain a level of safety comparable to that of a normal highway not under construction. Proper traffic control is critical to the safety of work zones. However, traffic control devices themselves may pose a safety hazard when impacted by errant vehicles. Little is
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Glauconite is an abundant aggregate in east central Texas. However, it is rather soft and thus subject to crushing and abrasion under normal construction processes. The purpose of this research study is to evaluate the quality of glauconite and determine its suitability for use on TxDOT pavement construction projects and if it is suitable, how to o
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Modified left turn signals had shown cost savings over the old style of traffic signals in initial installation and maintenance. This evaluation was conducted to determine whether those savings would be justified by no increase in the accident rates at th;Sponsored by Federal Highway Administration, Salem, OR. Oregon Div.;pg 30
This report provides specific details on much of the work done on a project for the Texas Department of Transportation for providing the capability for making pavement distress measurements. The report primarily contains hardware and design procedures used to implement the Texas Profiler/Rut-Bar systems and which will be useful for TxDOT personnel
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The Multi-Viewpoint Clustering Analysis (MVP-CA) tool is a semi-automated tool to provide a valuable aid for comprehension, verification, validation, maintenance, integration, and evolution of complex knowledge-based software systems. In this report, the contractor has shown the value of using their MVP-CA tool for analyzing a poorly structured rul
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The Atlanta District has constructed six pavement sections since 1993 using hydrated fly ash as the flexible base material. This research project was initiated to evaluate and monitor performance and changes in material properties for these six pavements through the year 2001. Evaluation of performance shall be based on visual documentation, fallin
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The rational allocation of pavement maintenance resources requires the periodic assessment of the condition of all pavements. Traditional manual pavement distress surveys, which are based on visual inspection, are labor intensive, slow, and expensive, and they pose a safety hazard when the raters have to get out of their vehicles and inspect the ro
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The ODOT Research Unit is currently evaluating a cable median guardrail installed on Interstate 5 between Brooks and Donald. The intent of this median application is to reduce the incidence of serious injuries and fatalities by preventing crossover accidents. The three-strand cable guardrail in place is a flexible barrier system that gradually redi
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United States. Department of Transportation. National Highway Traffic Safety Administration
1997-11-01
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Data from NHTSA's Fatality Analysis Reporting System (FARS) show that the ejection rate among fatally injured passenger vehicle occupants has remained at over 20 percent since the early 1980's. Because the risk of fatality in a crash is over three times as great for an ejected occupant compared with a non-ejected occupant (i.e., person retained in
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Traffic volume data, especially Average Annual Daily Traffic (AADT) volumes, are very important in transportation engineering for managing and maintaining existing facilities, and for planning and designing new facilities. This paper addresses the traffic count analysis developed to produce AADT's for freeway links based on traffic ount data. For f
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