Firefighters were also seen blasting water through the front windscreen to extinguish the blaze.
No one is believed to have been injured.
VicRoads confirmed two lanes are closed on the M80 Ring Road Altona-bound and one lane Greensborough-bound between Fitzgerald Road and Ballarat Road, due to the fire.
Image: 7News.com.au
"Follow the direction of emergency services and be vigilant in the area," a tweet said.
This story originally appeared on 7News.com.au - for more, click here.
