1.Western Harbour Tunnel and Warringah Freeway Upgrade
Transport & Logistics
ConstructionA major transport infrastructure project delivering a 6.5km dual three-lane tunnel under Sydney Harbour, connecting the Warringah Freeway at Cammeray to the Rozelle Interchange. The project creates a western bypass of the CBD to relieve congestion on the Sydney Harbour Bridge and Tunnel. Stage 1 (southern tunnels, Rozelle to Birchgrove) was completed in February 2025 by the John Holland and CPB Contractors joint venture. Stage 2, being delivered by ACCIONA, involves 4.8km of tunnelling from Birchgrove to Cammeray including under Sydney Harbour using tunnel boring machines, with TBM launch expected mid-2026.
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