The collision happened at around 12:45 on Tuesday and is being investigated by police as a ‘hit and run’, since the motorist failed to stop.
The incident happened along L’Ancresse Road, between the exit of Earlswood Garden Centre and Donkey Divers.
Officers would like to speak to anyone who was in the area at the time and saw what happened. They would also like to speak to anyone who can help to identify the motorist or their vehicle.
People with information should contact the Police Station on 725111 or call Crimestoppers anonymously on 0800 555 111.