The A419 has been closed in both directions following a serious incident this morning.
Both carriageways along the A419 are closed between the White Hart Interchange (A420) and the Commonhead Interchange (A4259) where the incident happened. The Wanborough Bridge has also been shut.
The road is expected to remain closed in both directions until early afternoon while a full incident investigation is carried out.
National Highways is advising road users to avoid the A419 and find an alternative route to travel.
Traffic is also heavy in Swindon as road users take diversions around the affected area,motorists are being advised to allow extra time for their journeys.
