Experimenteel multifactoronderzoek naar factoren die de beschikbare wrijvingskrachten tussen banden en natte wegdekken beïnvloeden. Tweede fase: Functionele eisen aan wegdekken. (Rapport + bijlagen).

In the second phase of this research emphasis is laid on the characteristics of road surfaces. Research is done on special constructed road surfaces with a great variety in the macro-roughness and the micro-roughness. On these road surfaces measurements are done for four types of tyres, two tyre treads and three kinds of speed. Results show the possibility to describe the coefficient of friction in a mathematical relation dependent of the surface characteristics and speed.