SCHEDULED80% CONFIDENCEGiven as scheduled, per the source[1]: "Western Harbour Tunnel remaining on track to open to traffic in 2028".
- Start
- Dec 31, 202875% CONFIDENCEfrom the source
Sydney Western Harbour Tunnel Set to Open
Sydney's Western Harbour Tunnel, redesigned mid-build from a cut-and-cover crossing to twin bored tunnels, is on track to open beneath the harbour in 2028.
- The 6.5 km Western Harbour Tunnel under Sydney Harbour remains on track to open in 2028, per an 11 August 2026 NSW Government release[2][3]
- Second TBM Barangaroo launched from Birchgrove Oval, joining Patyegarang, which started the month before; together they dig the final 1.5 km of twin tunnels between Birchgrove and Waverton[2][3]
- Each TBM is 15.7 m in diameter and 4,350 tonnes, the largest assembled underground in the Southern Hemisphere, working around the clock up to 50 m below sea level and installing about 13,000 precast segments[2][3]
- Expected traffic cuts are 35% on the Western Distributor, 20% in the Sydney Harbour Tunnel and 17% on the Harbour Bridge[2][3]
- The Berry St on-ramp in North Sydney is nearing completion, with mechanical and electrical fit-out under way[2]
References 380% CONFIDENCE
The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
- [1]75%youtube.com/watch?v=U2G_bLEGwmYyoutube.com· Posted Sep 15, 2026· Starts Dec 31, 2028 ✓· 37% of score
Given as scheduled, per the source: "Western Harbour Tunnel remaining on track to open to traffic in 2028".
- [2]88%Second giant Tunnel Boring Machine begins excavating for the Western Harbour Tunnelnsw.gov.au· Added Sep 15, 2026· 37% of score
- [3]76%Sydney's new under-harbour tunnel is set to open in 2028timeout.com· Published Jun 9, 2026· 26% of score
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