A 57-year-old man was critical in hospital after his car hit a signpost and trees in County Durham.
The man, from Stanley, was driving his black Jaguar X-type eastbound along the A693 shortly after 6am on Friday when his car left the road.
Police believe he suffered a medical episode at the wheel.
He was taken to the University Hospital North Durham where he was said to be critical.
Any witnesses are asked to call police on 0191 375 2159.