Researches on low noise pavement in Japan

摘要

The research on low noise pavement in Japan started at the end of 80's. It was about ten years later than that of European countries. This paper historically and categorically included the researches concerning low noise pavement. When considering dense asphalt pavement as control pavement, the drainage asphalt pavement and porous elastic road surface are identified as low noise pavement : (1) The result of the rough estimation through all the papers concerning initial noise reduction effect and the effect degradation indicates the amount of the performance of drainage asphalt pavement might be 3-5 dB(A) and the annual degradation is about 1 dB(A)/year. (2) The summary of the paper concerning the performance recovery gave us the reasonable explanation that the cleaning machine is only available to recovering the water drain effect but not to restore the noise reduction performance. (3) Porous elastic road surface showed the great improvement in the noise reduction performance. It also lets us expect that porous elastic road surface will give the fundamental solution to the highway noise problem in urban areas of Japan.