SA Police are investigating a single car crash at Findon late last night.
Police say that at about 11.45pm on Tuesday night, police and emergency services were called to Crittenden Road at Findon after reports of a single car crash.
The driver and single occupant, an 85-year-old man from Fulham Gardens was driving a white Holden Commodore when the rear end of the vehicle collided with a stobie pole and he was ejected from the vehicle.
SA Ambulance crews arrived on scene and the man was conveyed to the Royal Adelaide Hospital where he remains in a critical condition.
Major Crash Investigators attended the scene to determine the cause of the crash.