In accordance with Law No. 92-1444 of 31 December 1992 on noise control and the Environmental Code (Articles L. 571-10 and R. 571-32 to R. 571-43), in each department, the Prefect identifies and classifies land transport infrastructure according to its noise and traffic characteristics. On the basis of this classification, it shall determine, after consulting the municipalities, the sectors affected by noise, the levels of noise to be taken into account for the construction of buildings and the technical requirements likely to reduce them.
The sectors thus determined and the requirements relating to the acoustic characteristics applicable to them are set out in the annexes to the local planning plans (LDPs) of the municipalities concerned.
Article R. 571-33 of the Environmental Code specifies the infrastructures concerned by the sound classification:
— roadways where the annual average daily traffic, or provided for in the study or the impact statement, exceeds 5000 vehicles per day;
— intercity rail lines with average daily traffic exceeding 50 trains;
— clean public transport lines with an average daily traffic of more than 100 buses;
— urban rail lines with average daily traffic exceeding 100 trains.
The sound classification map and the prefectural decrees can be found on the website of the state departments in the department.
Only the documents annexed to the Prefectural Orders are authentic.
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