Construction will soon commence on intersections in Highgate and Maylands as part of the governments Urban Congestion Fund package for Adelaide.
The Victorian government will inject $1 billion into road and rail projects for Melbourne suburbs Lyndhurst, Cranbourne West and Lynbrook.
Major Road Projects Victoria will open the state's first continuous flow intersection at the corner of Punt Road and Swan Street on 17 March.
Construction has begun on major upgrades to the Wanneroo Road and Ocean Reef Road intersection in Perth.
The Queensland Government is investing $112 million for safety upgrades on nine high risk roads.