After two years of works, six lanes are open along the ring road between Edgars and Plenty roads in Bundoora.
The additional lane in each direction opened last Thursday, just in time for the Easter break.
It’s the third section of the ring road to be upgraded and is part of a 23-kilometre stretch jointly funded by a $1.1 billion federal and state governments package.
There are now three lanes each way, with four lanes at interchanges.
Victorian parliamentary secretary for transport Gary Blackwood said the opening would make it easier for the road network to cope with surrounding growth areas.
“This ambitious project included the laying of 93,000 tonnes of asphalt through more than 6000 truck trips and pouring of 19,550 cubic metres of concrete, which is enough to fill about eight Olympic-size swimming pools,” Mr Blackwood said.