Work will begin on a sky rail track to replace the congested level crossing at Toorak Road in Kooyong within weeks, the state government has confirmed.

The announcement comes as the state government releases images of the new Upfield Line stations to be built in Coburg.

The Andrews government says the Kooyong project, to be completed by 2021, will untangle one of Melbourne’s most notorious road-rail traffic snarls, but it also puts the state on track for a fresh clash with federal Treasurer Josh Frydenberg.

How the Toorak Road level crossing fix will look when it is finished.

The idea of sky rail in Toorak, in the heart of the wealthy inner-south-east, has already raised the ire of some residents. Local council Stonnington has controversially handed $10,000 of ratepayers’ money to a group set up to protest against the rail bridge.