This Technical Specification describes a method for determining the wet-road skid resistance of a surface by measurement of a sideway force coefficient SFCO. The method provides a measure of the wet-road skid resistance properties of a bound surface by measurement of sideway-force coefficient at a controlled speed. The method has been developed for use on roads but is also applicable to other paved areas such as airport runways. This Technical Specification covers the operation of the Odoliograph. This is a device developed by the Belgian Road Research Centre that uses the side-force principle to make routine, expertise and research measurements of skid resistance continuously on long lengths of road. A machine conforming to the general characteristics of the Odoliograph designed by the Belgian Road Research Centre and the specific provisions of this document may also be used for the tests. The skid resistance of a pavement is determined by friction measurements and measurements of pavement texture. Where measurement of pavement texture is required the standard for this measurement and the device is described in EN ISO 13473-1.