Woman in life-threatening condition after four-car A26 crash
It happened just before 4pm on Friday on the A26 near the Esso garage at Clayhill Services near Ringmer.
The woman, 76, from East Grinstead, who was driving a Suzuki, was seriously injured in the collision.
She was taken to hospital and is in a life-threatening condition, police said.
Two people from the other vehicles had minor injuries.
Police are looking for witnesses and anyone with relevant footage which could help them in their investigation.
A spokesman for Sussex Police said: “Officers from the roads policing unit are appealing for anyone with relevant dashcam footage or CCTV footage in the area to come forward.
“Witnesses or anyone with information should report it to Sussex Police online, call 101, or email [email protected] and quote serial 1002 of 25/08 – Operation Emu.”