United States. Department of Transportation. Federal Highway Administration
1998-01-01
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PDF
Portland cement concrete covers some 208,000 km (129,000 mi) of the Nation's highest volume streets and highways. Although concrete is a very durable material, steadily increasing traffic volumes and loads are beginning to take their toll, and many of these pavements are in need of extensive repair or rehabilitation. When existing concrete pavement
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This pamphlet provides a summary of the 1995 Status of the Nation's Surface Transportation System: Condition and Performance Report to Congress (C&P Report). It is the latest in a series of biennial reports that track changes in transportation physical and operating characteristics, finance, and usage patterns. Also included are estimates of capita
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United States. Federal Highway Administration. Office of Engineering
1998-01-01
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PDF
This pamphlet is intended as a general guide to effective, low-cost methods of improving and enhancing bridge and bridge approach safety. It is not a design manual or a substitute for engineering knowledge, experience, or judgement. Technical safety information such as bridge standards, crash-worthy approach rail systems and their attachment to the
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Safety on the roadways at nighttime has been a major concern for many years. Motorists driving at night are 2 to 3 times more likely to be involved in an accident at night than during the daytime. About half of the motor-vehicle deaths occur at night; however, death rates based on mileage are about four times higher at night than during the day (1)
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Changeable message signs (CMS's) have been used on major highways since the 1970's. However, unlike other traffic control devices, there are no nationally recognized specifications regarding the appearance of CMS's. The absence of guidelines has resulted in CMS's that display many colors, shapes, fonts, borders, and spacings. This research project
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This User's Guide is for the Federal Highway Administration's Traffic Noise Model(FHWA TNM®), Version 1.0 -- the FHWA’s computer program for highway traffic noiseprediction and analysis. Two companion reports, a Technical Manual and a data report,respectively, describe the acoustics and the vehicle noise-emissions database withinTNM.The User’s Guid
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This handy reference guide outlines the range of resources available to assist highway agencies and industry in implementing the Superpave system for asphalt mix design. This list is not exhaustive, however, as many other organizations are involved in the Superpave implementation effort. Additional information can be obtained from such sources as y
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This report presents the analysis conducted on relating pavement performance or response measures and design considerations to specific pavement layers utilizing data contained in the Long-Term Pavement Performance Program National Information Management System. The goal of this research activity was to enhance implementation and use of the 1993 AA
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During FY 1997, the Highway Funding and Motor Fuel Division of the Office of Highway Information Management (OHIM) entered into a research contract involving the estimation of local government highway bond information, by State, during a particular calendar year. The data are necessary for OHIM to produce a complete picture of local governments' fi
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The purpose of this Handbook is to provide practical advice for users of weigh-in-motion (WIM) technology, systems, sites, and states' "Successful Practices" using WIM systems. The states selected for each WIM system discussed in this Handbook are: California for bending plate, Missouri for piezoelectric sensors, and Oregon for load cell. The Handb
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The purpose of the showcase program evaluation strategy is to support the deployment of intelligent transportation systems (ITS) in southern California
The two most important societal trends today are the aging baby boom and women's increased independence. This paper compares the travel profiles of women aged 40 to 49(early baby boomers) with women aged 75 and over and with men aged 75 and over (parents of the baby boom) to estimate the impact of an aging population on vehicle ownership rates and
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In 1994, the Federal Highway Administration (FHWA) sponsored an international technology scanning review that focused on Japan, Australia, and New Zealand. Its purpose was to review the application of safety management systems. One of the primary findings was that safety audits were effective in improving highway safety in the countries where they
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Part 2 of the FHWA report on Road Safety Audits was prepared to provide the following:Additional detail on road safety organizations and the development of safety policies in Australia and New Zealand. This complements the information in Section 2 of Part 1; An overview of checklists used in the road safety audit process using examples from the Aus
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In 1995, a project was initiated to assess the costs versus benefits of the Strategic Highway Research Program (SHRP). Information was collected from State and local highway agencies on their experiences with the SHRP products, and this information was used as the basis for an economic analysis of the costs and benefits of the program and its produ
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The Federal Highway Administration (FHWA) has undertaken a multiyear project to develop the Interactive Highway Safety Design Model (IHSDM), which is a CADD-based integrated set of software tools to analyze a highway design to identify safety issues and tradeoffs. The IHSDM is envisioned to incorporate five analysis modules: policy review, design c
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