The main objectives of the project were to: - Clarify the “real” influence of the new tyre noise labelling of C3 truck tyres. - Establish scientific evidence on the tyre/road contribution to traffic noise emission from roads in the Nordic countries. - Generate a basis for qualified decision making concerning actions to mitigate traffic noise in the Nordic countries. - To define realistic new tyre noise limits for use in a future revision of the EU tyre labelling and the tyre noise limits, including rolling resistance and supplementing the labelling of wet grip with labels of snow grip and ice grip. - Demonstrate the usefulness or necessity of a second “roughly textured” ISO reference test track for tyre noise testing and labelling, hence creating scientific arguments for a short term revision of EU tyre noise regulation. Measurements of noise from 30 different truck tyre sets have been carried out by M+P at Twente Proving Ground in The Netherlands. The 30 tyres were: 8 steering axle, 12 drive axle (9 original, 3 retreated) and 10 Trailer axle tyres (6 original, 4 retreated). Measurements were performed at four different surfaces: ISO surface, Stone Mastic Asphalt (SMA 11), Thin Surface Layer (TSL 8) and Dense Asphalt Concrete (DAC 16).