One police car and two ambulances were in attendance at the collision which happened between the Hardwick turn-off and Whitchurch.
Traffic was queuing back into Whitchurch at around 8.30am while the collision was dealt with, although the road remained open.
A motorist who passed the scene said: “It looked as though there were two vehicles - a car and a van involved.
“The front of the car looked badly damaged.”
We are awaiting an update on the incident from the ambulance service and will bring this when we get it.
This latest incident comes just two days after two cars collided during the morning rush hour in a queue of traffic on the same stretch of road.