The man who tried to stop the fight told 7 News the scene was "absolutely disgusting".
The woman and witnesses to the incident have been interviewed by police, but officers are still trying to identify the man involved.
It follows an incident last month on the Central Coast where a man was filmed punching a woman in the face in a road rage incident.
The man in that incident was charged with assault and the woman he allegedly assaulted, Bianca Sams, 22, was charged with malicious damage, being armed with intent to commit an indictable offence and intentionally throwing an object at a moving vehicle.
She was also charged for having part of her body outside the car window and for not wearing a seatbelt.
Sams and the man were travelling in separate cars along the Pacific Highway in Lake Munmorah when the incident occurred at an intersection.
