UPDATE: The road has now reopened.

A serious crash in thick fog this morning has closed the Princes Highway out-bound at Dandenong.

All out-bound lanes are closed between Huntingdale and Clayton roads after a car veered off the road and crashed into a tree just after 7am.

The driver and sole occupant of the vehicle, an 85-year-old man, died at the scene.

Press PLAY below for details from police + the impact on traffic in the area

Image: VicTraffic/X