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Over a period of up to seven years, the tyre/road noise and the pavement texture of low-noise road surfaces were measured on a series of up to 21 full-scale sites situated in urban areas with a speed limit of 50 km/h. The study involved a wide range of noise reducing asphalt mixtures, including semi-dense macro rough asphalt AC MR and porous asphalt PA. It has been shown that the acoustic performance decreases asymptotically as a function of traffic volume. For PA the decrease can be delayed provided the pores do not become clogged by dirt. |
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| content link: |
http://www.bafu.admin.ch/laerm/08969/index.html?lang=en |
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| content language: |
English |
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no |
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| This content is related to: |
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| National projects |
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| area of interest |
| noise & vibration |
| road surface properties |
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| user type |
| road authorities/owners |
| research labs |
| city authorities |
| construction companies |
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