Police were called to Harlands Road in Haywards Heath after a car was in a collision with a parked van.
The incident happened at 7.45am near Central Sussex College.
A spokesman for Sussex Police said: “A car hit a parked van. The road was partially blocked. An ambulance was called as well.”
Sussex Police are still believed to be in attendance at the scene.
The incident happened near the junction with Turners Hill Road.