A 36-year-old man from Peterborough suffered serious head injuries after a collision on the A1 in Cambridgeshire.
The man was driving an Alfa Romeo when his car left the northbound carriageway near RAF Wittering, at about 5.25pm yesterday. He was taken to Addenbrooke's Hospital.
PC Stu Adam of Cambridgeshire Police, said: "I would appeal to anyone who saw the collision, or the vehicle prior to it leaving the road, to call police."Anyone with any information should call PC Adam on 101