Emergency services were called to the Hume Fwy, near the intersection of Lambing Gully Rd, after a truck went down an embankment and crashed into trees about 1pm on Wednesday, July 30.
The truck caught fire following the crash.
The driver, who is yet to be formally identified, died at the scene.
Officers are working to establish the circumstances of the crash.
The Hume Fwy was closed for several hours as emergency services attended the incident.
It has since reopened.
Anyone who witnessed the incident, has dashcam/CCTV footage or information is urged to contact Crime Stoppers on 1800 333 000 or submit an online confidential report via crimestoppersvic.com.au