This session provides participants with an introduction to the concepts of effective and timely pavement maintenance. It also presents the overall objectives and scope of the workshop. Upon successful conclusion of this session, the participant will be able to accomplish the following: 1. Understand why pavement maintenance is necessary and why car
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The purpose of this user guide is to provide all the information necessary to use the system efficiency and effectively and to enable potential users to determine its applicability.
This report is one of a series of nine reports produced as part of a contract designed to develop precise, detailed human factors design guidelines for Advanced Traveler Information Systems (ATIS) and Commercial Vehicle Operations (CVO). Among the other topics discussed in the series are functional description of ATIS-CVO, comparable systems analys
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FAST-TRAC: Twelve Intelligent Transportation Systems (ITS) activities were chosen by the Federal Highway Administration to be the subjects of case studies. The case studies were performed under the ITS Institutional and Legal Issues Program, which was developed in response to the Intermodal Surface Transportation Efficiency Act of 1991. The objecti
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United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
1995-09-01
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Attention to driver acceptance and performance issues during system design will be key to the success of the Automated Highway System (AHS). A first step in the process of defining driver roles and driver-system interface requirements of AHS is the definition of system visions and operational scenarios. Seven operational AHS scenarios were defined,
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The great technological advances that were made over the last decade in monitoring traffic and the increased emphasis on highway safety for truck traffic have prompted a need to determine more effective ways to monitor and inspect truck traffic. Commercial Vehicle Monitoring (CVM) facilities provide the highway community with the means of supervisi
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This study was an attempt to develop severity indices (SIs) for various fixed objects that are impacted when vehicles leave the roadway. The objectives of the study were two-fold, including both the development of new indices with recent data from two states and the exploration of methodological issues related to statistical modeling and a literatu
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This report results from FHWA's desire to look at an emerging transportation planning concept called least-cost-planning. Least-cost-planning embodies both a planning process and specific analytical techniques. It attempts to meet a given set of transportation objectives with a combination of improvements, policies, and programs that is less expens
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Simple models for particles hopping on a grid (cellular automata) are used to simulate (single lane) traffic flow. Despite their simplicity, these models are astonishingly realistic in reproducing start-stop-waves and realistic fundamental diagrams. One can use these models to investigate traffic phenomena near maximum flow. A so-called phase trans
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This paper presents an overview of an approach to address complexity issues and real-life engineering problems in large, urban transportation systems. In this context we discuss the fundamental problem of designing a metropolitan transportation system which is both efficient and controllable.
The report "Developing Effective Congestion Management Systems" chronicles the early development and implementation experiences of four metropolitan areas: Albany, NY; Dallas / Ft. Worth, TX; Seattle, WA; and Washington, DC. Each case study is examined with respect to select technical and institutional elements of its practice. The second report "D
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The goal of the ongoing, 20-year long-term pavement performance (LTPP) studies is to give State and Provincial transportation departments- the owners and customers of the LTPP program-the information and tools they need to build and maintain longer-lasting pavements. The Roadmap charts a course to the program's near-term and longer term destination
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Highway agencies have been evaluating crumb rubber modifier (CRM) in hot mix asphalt (HMA) since the 1970's. Three agencies, Arizona, California, and Florida, currently use CRM in HMA at levels that would approach or exceed the mandate in Section 1038 of the Intermodal Surface Transportation Efficiency Act of 1991. This report documents the use of
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Viable Advanced Traffic Management Systems will be central to the development of ITS technologies, and critical to the delivery of many private sector ITS services to the public. By its very nature, however, ATMS relies heavily on access to the public rights-of-way. Consequently, development of ATMS will require a high degree of coordination betwee
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Viable Advanced Traffic Management Systems will be central to the development of ITS technologies, and critical to the delivery of many private sector ITS services to the public. By its very nature, however, ATMS relies heavily on access to the public rights-of-way. Consequently, development of ATMS will require a high degree of coordination betwee
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This task report concerning alternative models of public and private sector involvement is the thirdin a series comprising the overall study, Overcoming Barriers to ITS - Lessons from Other Technologies:This report examines different ways the public and private sector can organize to deploy Advanced TrafficManagement Systems (ATMS) and Advanced Tra
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Very simple models of particles hopping on a grid appear too simple to have much similarity to traffic. Yet, some of these models can be proved to generate, in the so-called fluid-dynamical limit, variations of the Lighthill-Whitham theory. For more realistic particle hopping models, the fluid-dynamical limit is not known, but insight can be obtain
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This document contains the results from five crash tests conducted at the Federal Outdoor Impact Laboratory (FOIL) located at the Turner-Fairbank Highway Research Center in McLean, Virginia. The crash tests involved five Ford Festiva two-door sedans,which have been chosen as the 820C class vehicle, impacting an instrumented rigid pole. One test was
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United States. Department of Transportation. Federal Highway Administration. Turner-Fairbank Highway Research Center
1995-08-01
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Studies have shown that older drivers have higher rates of accidents, injuries, and fatalities on a per-mile-driven basis. A major cause ofroadway accidents for older drivers is failure to heed traffic signs.Previous research found that older drivers have difficulty detecting, reading, understanding, and responding to some symbolic traffic signs. T
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