Tuesday, 29 September 2009

Low noise road resurfacing

An interesting article in this months briefing from EPUK about unexpectedly high reductions in noise when a road in Uxbridge was resurfaced with a low - noise asphalt. The textured thin asphalt is approved by the Highways Authorities Product Approval Scheme and is stated to reduce noise by around 5.5 dB(A). When before and after measurements were done by the local authority (London Borough of Hillingdon) they found that the noise reduction was in fact closer to 7 dB(A). No firm explanation for this has been proved, but it may be that the road condition prior to surfacing was worse than in test conditions. The study shows the benefits of resurfacing with a low noise material, but it is only cost - effective if the road is to be resurfaced for wear reasons.

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