Police are appealing for witnesses to a collision involving a Vespa rider.
The 54-year-old local man was riding along Yeoman Road, Durrington, when he was reportedly forced off the road by another driver.
He was taken to hospital having suffered serious injuries including a broken arm.
The incident occurred about 4.31pm on April 8 and police are seeking to identify the driver of a white car, who may be able to assist with their enquiries.
If you saw what happened, or captured it on dash cam or CCTV, please email collision.appeal@sussex.police.uk quoting serial 927 of 08/04.