Safety Opportunities in High Friction Surfacing
Started: September, 2012 Ended: December, 2012 Project ID #4W4248 Status: Completed
The objective of this project is to develop a publication that can serve as a resource and reference document for local government personnel to consult when considering high friction surface treatments.
Over 50% of fatal roadway departure crashes occur on roadways classified as Local Roads and Collectors. One contributor to vehicles leaving the roadway is insufficient pavement friction. When a vehicle’s frictional demand exceeds the frictional force between a tire and the pavement, a skid develops. Such skids are particularly a problem when the pavement is wet (especially at horizontal curves), but may also be a problem because of low friction due to polished aggregate. On local roads, approaches to address low friction can include the use of high friction surface treatments, namely in spot applications where crash experiences suggests they may be needed. These treatments can address three conditions of concern: low friction, marginal friction affected by weather, and friction values not compatible with speeds and geometrics. ATSSA has recognized the need for a publication that can serve as a resource and reference document for local government personnel to consult when considering high friction surface treatments. The purpose of the work was the development of such a document. The expected reference document is divided into five parts. This includes an introduction, case studies, a glossary, and a discussion of materials and resources (websites, contacts, etc.).
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