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As part of the support for the implementation of the skid resistance standard (HD28) Highways England established a series of benchmark sites. These sites are used to investigate long term trends in skid resistance. To achieve this, three surveys of the sites are undertaken in each survey season (one in each survey period) in addition to the routine annual skid resistance survey. This report discusses the analysis of the survey data collected in 2015, and compares the results of the analysis to those from earlier years.

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