An 18-year-old woman is fighting for life after a motorbike crash in Tooradin last night.

The bike was travelling along the shoulder of the South Gippsland Highway before moving into the left lane where it was struck by a vehicle.

The 16-year-old rider sustained non-life-threatening injuries and an 18-year-old woman, who was his passenger, is in a critical condition.

The driver of the vehicle was not injured and is assisting police.

Anyone with dashcam footage of the incident is urged to contact police.

Press PLAY below to hear more from police