The Boston Manor Vidauct, a section of the M4 motorway between London and Heathrow (junctions 1-3), has been completely closed to traffic since the weekend.
The reason is hairline cracks that have appeared in senstive sections of the supporting steel structure. By sensitive we assume they mean if they aren't dealt with the road could collapse.
Heavy goods vehicles haven't been able to use the road since March, but now all traffic has been diverted as vital repair work is carried out. The earliest the motorway could re-open is Thursday.
The road has been closed now because the repairs need to be done before the Olympics start when the M4 will play a vital role in keeping traffic moving. Over the next few days plates will be bolted to the decking along these senstive areas of the M4, in a bid to stop any further cracks from appearing and shore up those that already exist.
Source: BBC News
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