As with any building or repair work the time needed to complete is invariably underestimated.
Unfortunately it looks like the M4's Boston Manor Bridge repair is going to take longer to repair than first thought and tomorrow is unlikely to see the M4 reopened. The Highways Agency site
http://www.highways.gov.uk/roads/23597.aspx is still saying that the M4 will open at 6.00 am tomorrow. However media reports are now questioning that.
In my earlier post on the closure I was not aware that the authorities only had 30 minutes warning to close the motorway as they discovered from ongoing previous repair work that further cracks had occured despite the repairs. These had already caused the diversion of heavy vehicles over 7 tonnes to be diverted off the M4 to avoid the Boston Manor Bridge. Engineers said that with the type of structure they are dealing with, these don't just sag and slowly collapse, they shatter suddenly. Better safe than sorry then!!!
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