What is the maximum permissible sound power per vehicle?

The maximum permissible sound power per vehicle is 138 dB(A), measured according to the DMSB pass-by measurement method (LWA method). Please note that this is the maximum allowed value according to the approval. If several vehicles will be driving on the track at the same time and you want to take full advantage of the available daily noise allotment, the sound power per vehicle should not exceed 128 dB(A). This value applies to 30 vehicles driving on the track at the same time.