Southern Interchange Compound
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The Southern Interchange Compound is currently being used for tunnelling and surface roadwork activities. Once the project is completed, the Southern Interchange will provide connections between the NorthConnex tunnel, Hills M2 Motorway and Pennant Hills Road. 

To future proof the project, the interchange has been designed to allow for future connections to the Sydney CBD. Permanent facilities will be housed at the Southern Interchange including the motorway control centre, substation, operational water treatment plant and southern ventilation outlet. 

Project timeline

Construction updates