Motorists are facing delays on the M4 following a collision on the roundabout at junction 3 of the motorway.
Transport for London (TfL) is advising motorists to expect delays on surrounding roads.
Highways England says London Fire Brigade and London Ambulance Service are at the scene of the incident.
Posting on Twitter, Highways England said: "2 lanes closed #M4 J3 eastbound exit due to a collision on the roundabout #Heston #Hayes approaching #A312 north.
"@LondonFire @Ldn_Ambulance @HighwaysEAST on scene dealing with the incident.
"Please approach with caution."
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Traffic is returning to normal
'Traffic remains slow'
According to Transport for London (TfL), traffic remains slow following the earlier collision.
On their website TfL write:
Traffic remains slow on approach both north and southbound along the Parkway.
Traffic is also slow eastbound on the M4, with tailbacks to junction 4.
All lanes now reopen
'Damage only collision'
A spokesman for Met Police said officers were called at 12.22pm to a “damage only collision” between a vehicle and a lorry.
According to police there are no reported injuries