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content name:	Low-noise road surfaces in urban areas
	Over a three-year period, the tyre/road noise and the pavement texture were periodically measured on a series of 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. According to the current results, AC MR shows promising acoustic and structural performance. AC MR test stretches may achieve acoustic lifetimes of up to 10 years depending on the traffic volume.

content link:	http://www.astra.admin.ch/dienstleistungen/00129/00183/00515/index.html?download=NHzLpZeg7t,lnp6I0NTU042l2Z6ln1ad1IZn4Z2qZpnO2Yuq2Z6gpJCDeHt6fGym162epYbg2c_JjKbNoKSn6A--&lang=en

content language:	English
English summary:	no

user comments
30.12.2009 Haider, Manfred	tyrosafe relevant

This content is related to:

project type

International projects

area of interest

noise & vibration

user type

road authorities/owners

research labs

consultancies

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created: Ferenc Rajcsanyi, 15.06.2009 14:43:00
last modified: Ferenc Rajcsanyi, 16.06.2009 09:53:00

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