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Description
A proposal is made for revised sound source levels for motorcycles and mopeds in the CNOSSOS-EU traffic noise calculation model, which are considered too low. For motorcycles they are partly below those for cars. L-vehicles have comparatively high impact in terms of annoyance and health effects on affected residents, while comprising a small percentage of overall traffic.The proposed amendment includes the factors for propulsion noise for constant speed, for acceleration/deceleration conditions and for gradients. Vehicle tampering and driving behaviour are taken into account with an increased sound level and weighting for the percentage of vehicles in the fleet with tampering and/or high rev driving.The analysis is based on several measurement data sources and on vehicle noise modelling, taking driving cycles, engine speed and tampering into account.