Requirements Avonmouth bridge on the M5 motorway near Bristol, UK, is heavily trafficked and the deck of its steel central and anchor spans – to quote the Highways Agency (HA) – ‘displays significant movement’. The crossing’s asphalt surfacings have tended to wear out rapidly as a consequence, requiring frequent maintenance. The HA set out to find a surfacing that would perform well on the bridge deck for an extended period plus offer othe

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