Link Between Road Unevenness and Compaction Investigated with Ground Penetrating Radar

Unevenness of road surfaces are a source of discomfort for the users, and to some extend even of safety hazards. Road administrations therefore put requirements on evenness in tenders. It seems accepted in the literature that roads in asphalt naturally present “long” wavelengths that are not so present in concrete roads. In this paper is presented how Ground Penetrating Radar (GPR) was used for investigating the influence of compaction of bituminous layers on unevenness with “long” wavelengths.