State Labor has ramped up efforts to target the Greens in Melbourne's inner north, unveiling a $110 million election pledge to duplicate the heavily congested Chandler Highway Bridge.

Opposition Leader Daniel Andrews on Sunday promised work to add an extra two lanes to the historic bridge would begin immediately if he wins the November 29 state election.

The pledge, which would mainly benefit motorists in the suburbs of Ivanhoe, Kew and Northcote, comes as Labor attempts to sandbag itself against the Greens in the inner north.

Opposition innovation spokeswoman and Northcote MP Fiona Richardson said the Greens remained “stridently opposed” to fixing the bridge, despite the safety risk to pedestrians and cyclists.

“Both the Liberal and Greens political parties are determined to ignore the needs of residents in the north no matter what the cost to safety and congestion,” Ms Richardson said.