A 18-year-old P-plater is being flown to a Melbourne hospital with serious head injuries after a single vehicle accident at Myamyn, north of Portland.
Portland police Sergeant Ray Hastings said the accident at 8.30am happened on the Myamyn-Condah Road, almost 50 kilometres north of Portland.
He said the single vehicle accident involved the driver losing control and hitting a tree about 8.30am.
"The vehicle has rolled and the car had been demolished. The 18-year-old male driver has been flown by air ambulance to the Royal Melbourne Hospital," he said.
"He has suspected head injuries and was in a serious but stable condition when he was put in the helicopter."
Sergeant Hastings said there was a large kangaroo dead on the road.
"The driver may have tried to go around the kangaroo and lost control. We won't know until we talk to the driver," he said.
Have you signed up to The Standard's daily newsletter and breaking news emails? You can register below and make sure you are up to date with everything that's happening in the south-west.