Samenvatting
Sweden has a long tradition in road surface condition monitoring. There are two measures that have dominated the estimation of the road surface condition; namely rut depth and IRI (International Roughness Index). Rut depth is the estimate of unevenness in the transverse and IRI in the longitudinal direction of the road. This report will deal with findings and conclusions made from years of experience in Sweden. The organised road surface monitoring scheme started in the end of 1970. The result is stored in the Swedish PMS (Pavement Management System). (Author/publisher)