Rosedale police are seeking dash camera footage or witnesses to a car rollover near the Blind Joe's Creek rest area, Rosedale, on Friday.
A 35-year-old woman was transported to Latrobe Regional Hospital after her silver Toyota Camry overturned on the Princes Highway about 8.30am.
The woman was then airlifted to the Royal Melbourne Hospital in a stable condition.
The woman was travelling east through Rosedale when the incident happened.
The highway was temporarily blocked off, but the accident was cleared by 10am.
Senior Constable Bill Verspaandonk said police would like to hear from anyone who noticed the Camry before or at the time of the accident.
Witnesses should phone Rosedale police on 5199 2222.