Abstract
In this study, tests have been made of the skid-resistance properties of asphalt surfacings the application of a light trailer apparatus constructed in accordance with the model developed by Road Research Laboratory. In all, the investigations related to 102 road sections, about 1000 km. in total length. Road sections at least one year in age were measured in regard to their skid-resistance properties the effect of type tread pattern and studs upon the coefficient of friction, and the effect and significance of the wearing induced by sanding material and traffic upon the coefficient of friction.