Police have responded to a truck crash on the Western Ring Road at the Melrose off ramp on Friday, 15 July.
Emergency services were called to reports a truck had crashed into safety barrier and rolled onto its side and into an embankment about 2am.
Rescue crews were required to safety extricate the driver, a 41-year-old Mernda man, who was taken to hospital for observation.
Firefighters are working to clean up a significant amount of chemicals that were spilled in the crash.
The exact circumstances surrounding the incident are yet to be determined and investigations remain ongoing.
The scene is expected to take several hours to clear and the off ramp will be blocked to all traffic.