Abstract
Abstract
Two main approaches for tire road friction estimation: the “cause based” and the “effect based” are generally dealt with in the literature. The slip-based method seems to be the most promising and is, consequently, a very popular current subject. LCPC, a French research body in civil engineering has been working for several years on the relationship between road texture parameters and road surface condition (dry, damp, wet) and tire friction performance. In this framework the two methods have been subject of dedicated programs. This paper briefly presents the two methods and the point of view of LCPC on them, based on its research, still under way.