Major Collision Investigation Unit detectives are investigating a serious collision in Deer Park early this morning.
A man was parked in the emergency lane of the Western Ring Road changing his tyre when he was struck by a car about 1am.
He was taken to hospital with life-threatening injuries.
The driver, a 35-year-old Kings Park man, was not injured and stopped at the scene.
He's been arrested and is assisting investigators with their enquiries.
The Greensborough-bound lanes of the Western Ring Road are expected to be closed for several hours so motorists are urged to take an alternative route.
Any witnesses or anyone with dashcam footage is urged to contact Crime Stoppers on 1800 333 000 or submit confidential report at www.crimestoppersvic.com.auExternal Link
