The purpose of this study was to develop and evaluate concepts for a low-cost, practical motorist information system. The system is designed to accomplish the following: Meet motorist trip-related information needs; Utilize existing or emerging technologies; Have acceptable costs to motorists and government; Address institutional and regulatory con
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This report gives an overview of research conducted for FCP Project 5B, Tunneling Technology for Future Highways. That project was aimed at research including state-of-the-art tunneling techniques unknown in the United States although accepted by other countries, and more experimental tunneling techniques not yet generally accepted. Specific resear
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This report documents the procedures and findings of a study to determine the traffic operations, safety, and economic impacts of dimming traffic signals at night. A laboratory experiment was conducted to measure how quickly and accurately elderly and color vision-deficient drivers responded to signals dimmed to as low as 12.5 percent of ITE recomm
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This report documents studies aimed at providing a means of establishing priorities among quality control tests and of optimizing sampling frequencies for each test, based on the effects of material properties measured on the performance of the pavements. Appropriate procedures were developed and are discussed in the report, including critical cons
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The current state of knowledge in the area of metal corrosion in reinforced soil retaining walls has been assessed. It was found that data is missing in several areas including the performance of the metal reinforcement in a highly alkaline environment as well as in the presence of high chloride concentrations. Moreover, no quantitative information
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United States. Federal Highway Administration. Office of Highway Information Management
1985-01-01
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This publication was prepared by the Office of Highway Information Management, Federal Highway Administration. It provides a general historical summary ·Of information dealing with highways, their use, and their financing, thus bringing under one cover a comprehensive statistical review of highway development in the United States through 1985. The
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Better trained tractor-trailer drivers can reduce the number of accidents on our highways, which is the purpose of this manual. These proposed Minimum Training Standards were developed by the U.S. Department of Transportation's Federal Highway Administration's Bureau of Motor Carrier Safety to provide such driver training programs with standardized
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The problem of truck loss of control accidents on interchange ramps is examined from the viewpoint of the suitability of highway geometric design, given the peculiar stability and control limitations of heavy duty trucks. Accident records were used to identify specific ramps which were over involved in jackknife, rollover, and run off road accident
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The purpose of this study was to determine the operational and safety effects of various pedestrian signalization alternatives. An analysis was conducted of pedestrian accidents, traffic and pedestrian volumes, geometrics, and signal data for 1,297 signalized intersections in 15 U.S. cities to determine the safety effects of pedestrian signals and
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The objective of the research was to review the existing bridge formula to find if modifications could be suggested to make it more rational. The intent was to more fully utilize the capacity of existing bridges without significantly shortening the service life of any. A brief study of the influence the proposed formula would have on pavement fatig
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This report describes a survey of current practice as well as analysis performed to develop guidelines for agencies which need load restrictions during spring thaw periods. The results show for a range of locations in the U.S. and Canada that the average load restriction applied is about 44%.
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