A study of tire-road noise and peak level at the side of the road of environmental pavement

Recently, environmental pavement which is designed to reduce the road surface temperature in summer season has been constructed in Japan. For example, there are solar heat-blocking pavement and water retaining pavement. However, it has not been clarified noise effect of these pavements. Therefore, we measured sound power level, tire/road noise and frequency characteristic of dense asphalt pavement, porous asphalt pavement, solar heat-blocking pavement and water retaining pavement. About the result of tire/road noise, porous pavement was least noisy (84dB), and dense asphalt pavement was the noisiest (90dB). Also, about the result of sound power level of 6.625m from center of the traffic lane, solar heat-blocking pavement was least noisy (64dB), and water retaining pavement was the noisiest (69dB).