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This report contains guidelines and recommendations for managing and designing for friction on highway pavements. The contents of this report will be of interest to highway materials, construction, pavement management, safety, design, and research engineers, as well as others concerned with the friction and related surface characteristics of highway pavements.
With advancements in materials, equipment, placement procedures, and project management techniques, the construction and rehabilitation of concrete pavements can be effectively accomplished under traffic. Many projects have been constructed under varying levels of traffic, ranging from temporary closures to the maintenance of high traffic volumes adjacent to or through the projects. However, the current state of the practice in constructing or rehabilitating concrete pavements under traffic relies primarily on a few high-profile and well-documented projects. This study identified practices from projects representing a wider range of conditions and techniques. Information on existing practices and advancements in concrete pavement construction and rehabilitation was gathered through literature reviews and a survey of state transportation agencies, including that of the District of Columbia and the Illinois Tollway. Furthermore, sixteen case examples were reported to illustrate successful projects conducted under a variety of scenarios.
This synthesis report will be of interest to pavement design, construction, management, and research engineers, highway safety officials, and others concerned with pavement friction characteristics. It describes the current state of the practice and discusses the methods used for evaluating wet pavement friction characteristics of new and restored pavements. This synthesis reviews models used for measuring and evaluating friction and texture, causes for friction changes over time, and aggregate and mix design to provide adequate friction. Also presented are construction and surface restoration practices for providing good pavement surface characteristics. In addition, considerations of noise and ride quality are discussed when compromise may be required.
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 338: Thin and Ultra-Thin Whitetopping summarizes available information to document how state departments of transportation and others are currently using thin and ultra-thin whitetopping overlays among various pavement rehabilitation alternatives. The report covers all stages of the proper application of whitetopping overlays, including project selection, design, materials selection, construction, maintenance, and eventual rehabilitation or replacement.