The friction developed between the road surface and vehicles’ tyres provides motorists with the reaction forces necessary for manoeuvring. On the English strategic road network this is managed through the specification of low speed skid resistance, texture depth and the polishing resistance properties of aggregates. A combination of changes to the strategic road network (motorway layout and pavement surface type) and the vehicle fleet (anti-lock braking systems and electronic stability control systems) in recent years makes it appropriate to review the current approach. The work reported here was commissioned by Highways England to investigate how surface characteristics affect the ability of road users to control their vehicles.

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