Drivers planning to travel into west London via the M4 today and tomorrow morning are reminded that the road is currently closed in both directions between junctions 1 and 3 and could be for up to four days.
Travellers are advised to seek alternative routes via the M3 or M40.
Signed local diversion routes are in place on the adjacent dual carriageways, the A312 and the A4.
The closure, which was implemented overnight on 6/7 July, is part of the ongoing repair work being carried out to the Boston Manor Viaduct, just west of M4 junction 2.
The M4 motorway, which is the main route from London to Heathrow Airport and the West of England, remains shut in both directions between junctions 2 and 3, and is expected to be closed for the next three days.
Drivers travelling into west London via the M4 today have been advised to seek alternative routes via the M3 or M40. It's led to horrendous traffic jams, with queues of up to an hour on the M40.
There are fears of Olympic road chaos as the main motorway from Heathrow to London remains closed today - and is expected to stay shut for at least another four days due to a cracked viaduct.
The M4, part of the Olympic Route Network, will be vital for transporting visitors into the city for the Games later this month and it would be a major embarrassment for organisers if the restrictions can't be lifted in time.
These motorists aren't happy about the long delays: