Motorists have endured a second day in a row of chaos on the roads after a car rollover and two truck breakdowns brought traffic to a standstill on the West Gate Freeway, Marissa Calligeros is reporting.

It all started when a four-wheel-drive flipped onto its roof on the West Gate Freeway at the Montague Street exit at around 6.30am, initially blocking three inbound lanes of the freeway,.

Then, 20 minutes later, a cement truck broke down in the Burnley Tunnel.

And 10 minutes after that, another truck broke down on the West Gate Freeway, this time near Millers Road at Altona North.