The truck driver involved in the Ringwood hit-run that killed a young schoolgirl handed himself in to police after he heard about the collision on the news.

The Age was told he rang police from outside a TAFE in Chadstone - about 10 kilometres from the scene - after he heard a pedestrian had been hit by a truck while crossing at the intersection of Dampier Grove and the Maroondah Highway on Wednesday morning.

The pedestrian, 14-year-old Aivy Nguyen, was on her way to school, walking to the nearby train station. She died in hospital.

Major Collision Investigation Unit detectives interviewed the driver, a 39-year-old from NSW, releasing him without charge on Wednesday pending further investigations.