M4: Traffic remains as road reopens after air ambulance called to crash near Swindon

There are miles of queues on the M4. Credit: National Highways

The M4 has reopened near Swindon after a collision between a lorry and a car shut the westbound carriageway.

The road was closed for two hours between J16 for Swindon and J17 for Chippenham.

The air ambulance was called to the scene along with Wiltshire Police and other emergency services.

National Highways says traffic remains heavy in the affected area, with delays of at least 20 minutes to be expected.

Traffic is queuing for several miles. Credit: National Highways

A diversion route was put in place during the closure.

Road users with vehicles over 14'3' feet in height should follow the solid diamond diversion symbol to avoid the low bridge:

Leave the M4 at J16 and take the 2nd exit onto the A3102.
Follow the A3102 to the roundabout with the A4 near Calne and take the 2nd exit to join the A4 westbound.
Continue on the A4 westbound to the A350 Chequers Roundabout and take the 3rd exit onto the A350 heading north.
Follow the A350 back to the M4 J17 roundabout and take the 1st exit onto the M4 westbound to continue your journey.

Road users with vehicles under 14 '3' feet in height should follow the below diversion:

Leave the M4 at J16 and take the 2nd exit onto the A3102.
At the roundabout with the B4042 at Royal Wooton Bassett take the 2nd exit onto the B4042.
Follow the B4042 to the A429 roundabout at Malmesbury and take the 1st exit onto the A429 heading south.
Continue on the A429 south back to the M4 J17 roundabout and take the 4th exit back onto the M4 westbound to continue your journey.