Tuning user-defined pavements in CNOSSOS-EU towards reliable estimates of road noise exposure

Low-noise pavements (LNPs) are among the most frequently used measures to mitigate road traffic noise. CNOSSOS-EU model enables improved predictions of noise exposure by customizing surface coefficients. However, accurately estimating their benefits to citizens remains a challenge. Specific LNPs can be defined by the user, but their calibration remains difficult, with different approaches in literature. Using standard roadside measurements and the recent Urban Statistical Pass-By methodology, this study presents a procedure for tuning user-defined coefficients of pavements in a real-world scenario. Test cases results are assessed against reference scenarios to evaluate the population exposure differences and reduction of potential harmful effects. The procedure can be a valuable instrument in aiding action plans in compliance with the 2002/49/EC Directive. The work also highlights the need to assess the acoustical characteristics of LNPs to effectively evaluate health benefits, as well as the need for comprehensive studies defining the exact characteristics of LNPs.