“…a high water drainage capacity) can improve the skid resistance over a wide range of speeds. Pioneering studies on the role of micro/macrotexture under wet braking conditions can be found (Giles, 1957(Giles, , 1965Schulze, 1959Schulze, , 1969Schulze, , 1970Moore, 1969Moore, , 1975Geyer, 1972;Holla and Yandell, 1973;Moore and Humphreys, 1973;Balmer, 1975;Rhode, 1976;Holla, 1977;Taneerananon and Yandell, 1981;Holt and Musgrove, 1982;Horne and Bü hlmann, 1983). Size, density and shape (slope) of the microasperities on top of the aggregates are essential to overcome the thin water film and to make direct contact with the rubber.…”