Police are appealing for witnesses to a collision between a car and a motorcycle which occurred at the junction of the A270 Old Shoreham Road and the B2167 Southview Road, Southwick, yesterday.
It happened just after 9am near roadworks and the motorcyclist, a 23-year-old woman from Brighton, suffered serious head and leg injuries.
She had been riding a silver Suzuki GZ125cc.
She was taken to hospital for treatment.
The other vehicle involved was a silver Ford Fiesta, driven by a 35-year-old Shoreham woman, who was unhurt.
Anyone who saw what happened is asked to email firstname.lastname@example.org or phone 101, quoting serial 280 of 22/9.