United States Department of Transportation
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Selection Criteria for Coarse Aggregate in Flexible Pavement Surfaces
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2021-11-01
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Alternative Title:Synthesis: Evaluation Selection Criteria for TxDOT Form 2088, Surface Aggregate Selection Form [Project Title]
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Edition:September 2020 to August 2021
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Abstract:The safety of the traveling public is a priority for the Texas Department of Transportation (TxDOT) and the Federal Highway Administration (FHWA). From the 1960s to current practice, FWHA’s guidance has evolved along with TxDOT’s policies and procedures to reduce wet-weather accidents. TxDOT’s Form 2088 is part of the wet-surface crash reduction program. The research team performed a synthesis study and investigated current state-of-the-practice and emerging research for the criteria on TxDOT’s Form 2088, along with criteria being used by other states and governing agencies that determine friction availability and demand. The factors that affect an agency’s management of pavement surface friction to maintain highway safety while reducing wet-surface crashes were evaluated. A survey was performed with local and nationwide agencies to document the experience and performance of their management of pavement surface friction including the criteria used to establish pavement friction availability and demand.
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[PDF-1.63 MB]
