Police are appealing for witnesses after a collision between a Tesco delivery van and pedestrian.
The van was travelling north on Pagham Road in Bognor when the crash occurred on Friday afternoon at 5.45pm.
A 60-year-old man from Bognor Regis was taken to Southampton Hospital with a serious head injury where he remains in a critical condition.
Police are appealing for witnesses to the incident to contact police on 101 quoting Operation Malvern.
More top news
Sunday's weather update for the east
Sunday's weather update for the west
Philippa has Sunday's weather for the east of the region