Nighttime road traffic noise exposure

The map shows the nighttime road traffic noise to which the population is exposed. The data is based on area-wide model calculations (sonBASE). The Swiss road network included in this calculation covers approximately 45,000 km. The traffic data for road traffic was determined on the basis of the NPVM. To this end, approximately 4,000 traffic counts from 2021 were processed, which were carried out by the federal offices ASTRA and FSO as well as by the cantons and cities. The calculations are not legally binding. The only legally binding data relating to noise exposure and noise improvements are those issued by the responsible enforcement authorities, i.e. for motorways the Swiss Federal Roads Office (FEDRO), and for main and other roads the relevant cantonal authorities.