A truckjackknifed near Melbourne's Burnley tunnel, blocking four lanes for over an hour during peak hour traffic chaos.
The incident happened eastbound before the tunnel, heading towards the Monash Freeway, and traffic is very heavy on approach, with VicRoads warning drivers to avoid the area and find another route.
Paramedics have arrived at the scene to assess the situation, an Ambulance spokeswoman said.
The truck has been moved and all lanes are now open. VicRoads it may take some time for congestion to clear.