The NSW Government has approved the final stage of WestConnex, linking the M4 and M5 motorways.
The twin tunnels about 7.5 kilometres long will be able to accommodate up to four lanes of traffic in each direction.
The M4-M5 Link project will also transform the disused Rozelle Rail Yards into a 10-hectare park with green space, footpaths and cycle ways. A bridge will link the open space at Rozelle to the foreshore parks adjacent to Rozelle Bay at Annandale.
Minister for Planning and Housing Anthony Roberts said the link will take thousands of trucks off Parramatta Road and save motorists hours of travel time each week.
“The M4-M5 link is part of a comprehensive range of road and public transport projects that are all connected and will make Sydney a much better place to live,” Mr Roberts said.