A pedestrian was left with life-changing injuries following a collision in the Tesco car park in Church Road, Hove.
The incident involving a sign-written van occurred on the evening of Sunday 9 November.
The victim, a 69-year-old local man, was taken to Royal Sussex County Hospital in Brighton with leg and pelvic injuries, where he remains at this stage.
The van driver momentarily stopped but did not leave any details at the scene, and officers are keen to speak to him.
Anyone who saw what happened, or who has dash cam or CCTV which captured the incident, is asked to email collision.appeal@sussex.pnn.police.uk quoting serial 1133 of 09/11.