Police are investigating the circumstances surrounding a collision which occurred in Tarneit on Tuesday, 25 May.
Officers have been told a car and truck collided near the intersection of Dohertys Road and Davis Road about 10.15pm.
Emergency services worked for just over one hour to free The driver of the car who was airlifted to hospital with life-threatening injuries.
The driver of the truck was taken to hospital with non-life-threatening injuries.
Police are yet to determine the exact cause of the collision and are appealing for anyone who witnessed the crash or with dashcam footage to contact police.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report at www.crimestoppersvic.com.au