Two lanes on the M4 are currently closed due to vehicle fire on M4 Westbound between Junction 14 A338 and Junction 15 A346 Marlborough Road, Swindon East.
There is a heavy congestion, with a travel time of 60 minutes.
Police and firefighters are at the scene.
A Dorset and Wiltshire Fire and Rescue Service spokesman said: "Crews from Stratton and Newbury attended and used two breathing apparatus and one hose reel jet."
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