Noise rating of road infrastructure in Vienna

The noise classification of land transport infrastructure is a regulatory approach taken pursuant to Article L571-10 of the Environmental Code, and the Decree of 30 May 1996, which require the prefect of each department to classify land transport infrastructure according to 5 categories (1 being the noisest and 5 least noisy). From this classification shall be deducted from the noise-affected sectors within which special building rules apply.
The Prefectural Decree takes into account all lanes with traffic exceeding 5,000 vehicles per day.