To calculate noise volumes based on traffic volumes, Visum provides the Noise-Emis-RLS90 and Noise-Emis-Nordic procedures. The Noise-Emis-Rls90 procedure is based on the RLS-90 of the noise reduction for roads by the Forschungsgesellschaft für Straßen- und Verkehrswesen, the Noise-Emis-Nordic procedure on the Nordic Council of Ministers (1996) model.
The model is fairly simple but sufficient to identify relative variations, that is, how, where, and to what extent traffic-routing and road construction measures affect traffic volumes and, as a consequence, the noise situation of particular roads.
