This study aims to develop a procedure that can be used to assess and compare the relative in-service skid resistance of road surfacing made with different coarse aggregates. A case study on the Isle of Skye was used to collect and analyse skid resistance measurements made on road surfacing that utilises a range of aggregate sources. Friction measurements were collected on both local roads and the A87 trunk road using both SCRIM and GripTester devices. Based on the study, a method to justify the use of local or alternative aggregates is presented. The study also showed that the use of smaller aggregate mixtures (6 and 8 mm) enhances the friction provided by asphalt mixtures. The proposed method could reduce the need to import aggregates, resulting in reduced emissions from haulage providing a more cost effective and sustainable alternative.

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