TRANSPORT

Waitematā Harbour Connections: Additional Crossing

NZ Transport Agency Waka Kotahi / Auckland Transport · Auckland

A second Waitemata Harbour crossing. NZTA's mid-2026 investment case recommended a tunnel, but in August 2026 the Government ordered a further Crown-led business case instead of choosing an option, pushing the decision to at least 2027. That work is half funded by Auckland Council, led by an independently recruited senior responsible owner, and reports during 2027. It will also assess a Meola Reef bridge favoured by the Auckland mayor, alongside a private consortium's pitch to upgrade the existing bridge. Treasury reviewed the earlier preferred option at ~$23-27b.

Weak signals: elevated risk Data: High

Delivery Confidence Score, 0 to 100, higher is better: a ranking of how strong this project's delivery signals are, not a probability. It blends eight factors, including the election risk and policy alignment shown below.

Breakdown▾

Data current as at 13 Jun 2026, when the pipeline was last checked against its source.

Key facts

Region: Auckland
Sector: Transport
Status: Planning
Estimated value: $25b
Indicative completion: 2040
Funding status: No Source
Lead organisation: NZ Transport Agency Waka Kotahi / Auckland Transport
Election risk: Extreme

Election risk assessment

National wants a road-only tunnel under the Waitematā Harbour. Labour and Greens want a multimodal crossing including rail. The two approaches differ by $8–18B in cost, a decade in timeline, and fundamentally in transport mode. No consent, no committed funding.

Government priority alignment

HIGH: Road-only tunnel option chosen, aligns with the government roads priority (though unfunded).

Chronology

2023Indicative business case: options $15-25b+
2024Government backs a tunnels-based crossing
2026NZTA investment case recommends a tunnel, with value engineering and seabed testing completed
2026Government orders a further Crown-led business case instead of selecting an option, deferring the decision to at least 2027; a Meola Reef bridge route and a private consortium's bridge-upgrade pitch are also to be assessed (August)
2027Further business case due to report

Source

NZTA: Waitemata Harbour Connections ↗ · Beehive: Next steps on Waitemata Harbour crossing ↗ · RNZ: Another business case for Auckland harbour crossing confirmed despite recent NZTA study ↗

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