Improvement in the effect of drainage as
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S. Meiarashi; M. Ishida; F. Nakashiba; H. Niimi; M. Hasebe; T. Nakatsuji
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Article
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1996
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Elsevier Science
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English
โ 880 KB
## In this report, we analyze the relationship between noise reduction and the thickness and aggregate size of the drainage asphalt road surface. Earlier results indicated overall noise reductions of 3-5 dB. However, noise reductions of 5-10 dB are necessary to improve the urban roadride areas of Ja