Traffic congestion is affecting the A27 westbound just past the Kingston roundabout, near Lewes, this morning (Monday April 20) where a car has collided with a central barrier and possibly a van.
The incident was reported shortly after 8.30am today.
A woman in her mid-20s is reported to be trapped in the car.
It is not known if or how badly she may be injured, but she is conscious and breathing.
Motorists are advised to avoid the area and seek alternative routes if possible.