Wiltshire Police are currently dealing with an overturned lorry at Junction 15 of the M4 with Dorset and Wiltshire Fire & Rescue Service and South Western Ambulance Service.
The incident occurred at around 8.30am this morning at the roundabout off the westbound slip road.
The eastbound and westbound slip roads from the M4 onto the roundabout are currently closed.
Traffic is building up and drivers are being urged to seek an alternative route and use Junction 16 for access to Swindon.
