The correlation between speed and road surface condition is of interest for the planning of pavement maintenance on the road network. The costs and the target variables that are affected by this correlation are, in addition to travel time, fuel consumption (vehicle costs), energy and environment. According to previous studies of the road surface influence on the vehicle speed increased rut depth (RUT) and increasing longitudinal road unevenness (IRI) causes decreased vehicle speed. In the description of the road surface macro texture (MPD) is normally also included. There has, however, been a lack of knowledge about the importance of MPD on vehicle speed.