UPDATE 9.17am: No one has been injured and the vehicles are being towed.
UPDATE 9.11am: Traffic is moving slowly along Marong Road after a car crash on the corner of Marong (Calder Highway) and Smiths roads.
Fire crews are clearing the area and an ambulance is on scene.
It is believed a blue Corolla and a red 4WD are involved in the crash.
EARLIER: Emergency services are on their way to a crash on the Calder Highway at Maiden Gully.
More to come.