Sussex Police are appealing for witnesses to a collision involving a moped and a car in Southgate Avenue, Crawley on Thursday (August 19).
The collision took place on the carriageway at about 11.30am close to the St Francis of Assisi Catholic Primary School and Southgate Park.
A moped rider suffered a suspected life-changing injury and was flown by air ambulance to the Royal Sussex County Hospital in Brighton.
The road was expected to reopen shortly after 3.45pm.
Anyone who has any information about the collision or has dashcam footage or CCTV footage of it can email collision.appeal@sussex.pnn.police.uk quoting Operation Fund.