In the frame of the new round of the Noise Mapping and Action Plan for Autostrade per l’Italia S.p.a. motorway network, a study concerning the influence of road surfaces on traffic noise has been carried on. In particular, a new procedure to determine correction coefficients for CNOSSOS database has been developed. Sound pressure levels and vehicle pass-by speed have been measured to analyse the traffic noise component due to tyre-pavement interaction. The measurements have been carried out simultaneously in three motorway sections placed in the A14 motorway, characterised by the laying of three different pavements, in order to compare their acoustic performance. For the noise emission measurements, the Statistical Pass-By method has been used, according to ISO 11819-1:2004. A comparison of the sound emission of three vehicle categories (light, medium, heavy) is presented with reference to the different pavements. The outcomes have been preparatory for the determination of correction coefficients for CNOSSOS database, defined by the EU Directive 996/2015 and also in accordance with the recent update introduced by the Delegated Directive 2021/1226/EU.