A study has been conducted to evaluate and analyze Portland cement concrete (PCC) pavements in order to develop recommendations for the design and construction of long-lived concrete pavements. In involved a detailed evaluation and analysis of the PCC pavement data in the Long-Term Pavement Performance (LTPP) database using a variety of means to de
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A review was conducted to identify the tasks, functions, and activities that the Federal Highway Administration (FHWA) Federal-aid (FA) Divisions currently perform related to highway safety. The team visited nine States and conducted meetings with various agencies and organizations responsible for highway safety improvement programs and projects. T
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The Federal Highway Administration (FHWA) administers three major programs that: (1) provide federal assistance to the States to construct and improve the National Highway System, urban and rural roads, and bridges (Federal-aid Highway Program); (2) set minimum safety standards for trucks and buses to promote safe commercial motor vehicle operation
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The objective of this experiment -- part of a series exploring human factors issues related to the Automated Highway System (AHS)-was to determine whether driving performance would be affected by extended travel under automated control at a velocity higher than the speed limit and closer to the vehicles ahead than usual. The experiment, conducted i
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This is the summary of a study conducted by C.V. Zeeger, H.F. Huang, J.R. Stewart, and C. Williams of the University of North Carolina Highway Safety Research Center. The purpose of this study was to examine National Highway System (NHS) safety issues using the Federal Highway Administration's Highway Safety Information System (HSIS). The HSIS data
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The effect on driving performance of using a speed, steering, and gap control system (SSGCS) and a collision warning system (CWS) was assessed in an experiment conducted in the Iowa Driving Simulator. Driving performance data were obtained from 52 drivers -- 32 of whom drove with both systems, and 20 controls who did not have access to either. Resu
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United States. Federal Highway Administration. Office of Engineering
1998-04-01
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PDF
The National Highway Construction Cost Index (NHCCI) is intended as a price index that can be used both to track pure price-changes associated with highway construction costs and to convert current-dollar expenditures on highway construction to real- or constant-dollar expenditures. The NHCCI is intended to replace the Federal Highway Administratio
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Manual developed for the FHWA training course Geosynthetic Engineering Workshop. The manual enables a highway engineer to correctly identify and evaluate potential applications of geosynthetics as an alternative to other construction methods and as a means to solve construction problems. The manual addresses primarily geotechnical issues and is lis
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Minimizing infiltration of water in pavement structures has long been a priority of pavement designers. Incorporation of subsurface edgedrains is frequently an integral part of a pavement drainage system. In order for such a system to be effective however, it must be properly installed and maintained. With advances in video technology, inspection o
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Human factors can be defined as designing to match the capabilities and limitations of the human user. The objectives of this human-centered design process are to maximize the effectiveness and efficiency of system performance, ensure a high level of safety, and maximize user acceptance. These objectives are achieved by systematically applying rele
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Human factors can be defined as ?designing to match the capabilities and limitations of the human user. The objectives of this human-centered design process are to maximize the effectiveness and efficiency of system performance, ensure a high level of safety, and maximize user acceptance. These objectives are achieved by systematically applying rel
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Human factors can be defined as "designing to match the capabilities and limitations of the human user." The objectives of this human-centered design process are to maximize the effectiveness and efficiency of system performance, ensure a high level of safety, and maximize user acceptance. These objectives are achieved by systematically applying re
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United States. Department of Transportation. Federal Highway Administration. Office of Research and Development
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1998-03-16
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PDF
AMASCOT demonstrated and evaluated the feasibility of automating the collection of mileage-by-jurisdiction data and electronic data interchange for International Fuel Tax Agreement (IFTA) and International Registration Plan (IRP) reporting. The test involved the states of Iowa, Minnesota and Wisconsin and motor carriers from the three states. 30 in
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United States. Department of Transportation. Federal Highway Administration. Office of Research and Development
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1998-03-16
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PDF
The CAPITAL project was to assess whether the triangulation of cellular phones aboard vehicles could provide a more cost efficient approach than the presently used induction loops and video cameras. The test was carried out in the Washington DC area and included I-66, I-495, I-270 and various state roads (see Figure l).. It covered a period of 27 m
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United States. Department of Transportation. Federal Highway Administration. Office of Research and Development
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1998-03-16
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PDF
This project was a demonstration of the use of live aerial video recorded from a rotary wing aircraft operated by the Fairfax County, Virginia Police Department and transmitted to ground stations for re-transmission and use by Fairfax County and Virginia Department of Transportation (VDOT) for incident and congestion management. The demonstration o
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United States. Department of Transportation. Federal Highway Administration. Office of Research and Development
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1998-03-16
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PDF
Genesis was a Field Operational Test using alphanumeric personal communications devices (pagers) and personal digital assistants (PDAs) to distribute traffic information in the Twin Cities Metropolitan area of Minnesota. This test is the second of a group of three Minnesota Guidestar tests to complete that were sharing traffic information from the
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United States. Department of Transportation. Federal Highway Administration. Office of Research and Development
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1998-03-16
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PDF
TRAVLINK demonstrated the use of Automatic Vehicle Location (AVL), ComputerAided dispatch (CAD), and Automatic Vehicle Identification (AVI) systems on Metropolitan Council Transit Operations (MCTO) buses in Minneapolis, Minnesota and western suburbs, and the distribution of real-time bus schedule information and traffic information to travelers usi
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Since the initial development of prototype automotive head-up displays (HUDs), there has been a concern that the presence of the HUD image may interfere with the driving task and negatively impact driving performance. The overall goal of this experiment was to examine the driving performance implications of an automotive HUD when used to present si
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This Travel Time Data Collection Handbook provides guidance to transportationprofessionals and practitioners for the collection, reduction, and presentationof travel time data. The handbook should be a useful reference for designingtravel time data collection efforts and systems, performing travel time studies,and reducing and presenting travel tim
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