POLICE were responding to a report of an erratic driver when a car veered across the road and overturned near Koondrook on Tuesday.

A Cohuna police officer was driving in a westerly direction along the Cohuna-Koondrook Road shortly after 4.15pm when he was confronted by a small sedan careering out of control from the opposite direction.

Police said that the car narrowly missed a utility being driven in the same direction as the police car.

A man and a woman in the overturned car, both from Cohuna, were taken to hospital with non life-threatening injuries.

Marks on the road indicated that the overturned vehicle was driven onto the left gravel verge after rounding a left bend, twice swerved onto the bitumen, then skidded across the road and overturned down the sidecut.

It was the second of two serious collisions attended by Cohuna Fire Brigade's rescue crew that day.

A man was trapped by the legs after a four-wheel-drive vehicle struck a tree on Nursery Bend Track in Gunbower National Park late on Tuesday morning, about 10 kilometres from Cohuna.

The injured man, 47, a passenger in the vehicle, was treated by paramedics while a rescue crew worked for more than an hour to free him.

The man was conveyed by ambulance to the recreation reserve, where he was transferred to an ambulance helicopter.

He was airlifted to the Alfred Hospital with leg fractures.

The man's son, 18, was driving the vehicle when the accident occurred.

Police said that driver-inexperience was the cause of the accident.