Police are seeking witnesses to a crash on the A27 at the junction with Manor Road, Lancing on Saturday night.
The black Vauxhall Corsa was being driven east on the A27 in Lancing when it left the road at the junction with Manor Road and collided with a garden fence at 10.50pm.
Nobody else was in the car.
The 25-year old Worthing man driving the car was freed by firefighters and was taken to the Royal Sussex County Hospital in Brighton to be treated for a head injury, but was discharged the following day.
Anyone who saw what happened is asked to call Sussex Police on 101 or email firstname.lastname@example.org quoting Operation Savoy.