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. 

Tunnel breakthrough

The first breakthrough occurred between the Southern Interchange and Wilson Road Compound in December 2017. Prime Minister Malcolm Turnbull said the project was on track to shift 5,000 trucks off Pennant Hills Road and return local roads to local communities.

“NorthConnex is the missing link between the M1 and M2 motorways and will save motorists up to 15 minutes travel time on each journey as they bypass 21 sets of traffic lights underneath Pennant Hills Road,” Mr Turnbull said.

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Project timeline

Construction updates