Major Collision Investigation Unit detectives have charged a man following a fatal collision in Grangefields on Saturday night.
It is alleged a Nissan and a Toyota collided with two motorcycles on the Western Freeway about 11.20pm on 5 July.
One of the riders, a 58-year-old Melton woman, died at the scene.
The other motorbike rider, a 61-year-old Melton man, was transported to hospital with life-threatening-injuries.
The drivers of the cars stopped at the scene and were uninjured.
Detectives arrested the driver of the Nissan, a 20-year-old Strathtulloh man, and the driver of the Toyota, a 34-year-old Brookfield woman.
The Brookfield woman was interviewed by detectives and released pending further enquiries.
The Strathtulloh man was interviewed and charged with culpable driving causing death.
He will appear before the Melbourne Magistrates' Court today.
