Effect of low-noise pavements on traffic noise propagation over large distances; influence of grounds and atmospheric conditions

摘要

Researches carried out in the past fifteen years have made possible the identification and the classification of the acoustic performances of road surfaces for short distance in terms of vehicle pass-by LAmax. At the beginning, 0/20 mm to 0/10 mm single layer porous asphalts were the only low-noise pavements to be used in France and western Europe. Since the last five years, new pavements composed of small size chippings (0/6 mm), spread in thin layer, have been studied. After measurements carried out according to standardised methods, they can be considered as low-noise pavements too. First experiments show that they can be used as much in suburban as in urban situations. These preliminary results found for road near-field configurations are confirmed for long range situations in terms of equivalent sound pressure levels LAeq, indicator more currently used for environmental nuisances.