International audience ; A public tender was issued by the Wallonian Road Administration (SPW Mobility and Infrastructures) to realize a measurement campaign using CPX method (ISO 11819-2) to determine the acoustical quality of road pavements on the Walloon major road network. The task was assigned to the Belgian Road Research Centre (BRRC) after the procedure of public procurement. The project ran from March 2018 to August 2019. The survey allows the Walloon road administration to assess the state of maintenance, e.g. wear and damage to the road surfaces and to complete the actual database (composed of skid resistance characteristics, ?) to help in the global strategy for road resurfacing of the major road network. In further studies results will be used as input for noise mapping. The project included the realization of CPX measurements on about 1860 km of major roads, off which the majority are motorways. All roads were measured with P1 and H1 tyre sets, so in total 3720 km of measurements were performed. A speed of 80 km/h was used and only the slow lane was measured in two directions. To be able to analyze and compare visual aspects with results, localized photos were taken during the measurement campaigns and linked to the noise measurements per 20 m road segment. An acoustical classification system was established and used for the end analyses. A visualization of results on map was realized by SPW. In addition to being didactic, this map makes it possible to visualize the distribution of results labeled ?very noise reducing? to ?very noisy?.