Police and emergency services responded to a collision in Thornhill Park on 18 January.
Officers were told a silver BMW sedan collided head-on with a small Isuzu truck travelling on Mt Cottrell Road, north of the intersection of Wiltshire Road, about 10.10am.
The driver of the BMW, a 33-year-old Point Cook man, received non-life-threatening injuries and was taken to hospital via Air Ambulance.
The driver of the truck, a 72-year-old Melton man, was hospitalised with minor injuries.
The cause of the collision is unknown at this stage and the investigation is ongoing.
Anyone who witnessed the collision or with dashcam footage is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report at www.crimestoppersvic.com.au.