The Department of the Environment of the Flemish government pursues an active environmental policy, whereby maintaining or even improving the quality of the living environment in Flanders is an important objective.In support of this policy, the Department1 set up a large-scale survey in 2001 concerning the experience of annoyance in Flanders. It concerned a first baseline survey, called SLO02, in which more than 3,200 inhabitants of Flanders were questioned in writing about the degree of annoyance they experience from noise, odor and light. The results of this baseline measurement were used as a basis for objectives included within the nuisance themes of the Flemish environmental policy plans. The SLO results are used in function of the policy development concerning quality of life. Specifically, they are used to monitor the environmental objectives of the Pact 2020. With the Pact, the Flemish Government aims for more prosperity and well-being, a competitive and sustainable economy, more people at work and a high level of quality of life for the population, and this with efficient and effective management. One of the objectives included in the Pact 2020 is "a significant reduction of the potentially seriously annoyed by traffic noise by 15% by 2020. Furthermore, SLO results provide support for monitoring European objectives at the Flemish level. The 7th European Environmental Action Program includes, among other things, the objective that noise pollution in the EU must decrease significantly by 2020.And finally, they also feed into the elaboration of the strategic vision of the Flanders Spatial Policy Plan approved in July 2018. In the first place to the concept of 10 core qualities for spatial developments described in the strategic vision. But also in the further elaboration and deepening of the aspect of environmental quality of life within spatial planning as a whole.