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TRANSPORT
Northland Transport: RoNS Corridor
NZ Transport Agency Waka Kotahi · Northland
The Northland Corridor RoNS, about 100km from Warkworth to Whangārei in three sections, including an alternative to the Brynderwyn Hills. Full delivery is estimated at $15-22b by about 2039 and the bottom of that range is shown. Near-term funding of about $187m covers design, consenting and property.
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Breakdown▾
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.
Each axis is a scoring factor (0 to 100)
Data current as at 16 Sept 2026, when the pipeline was last checked against its source.
Key facts
- Region
- Northland
- Sector
- Transport
- Status
- Planning
- Estimated value
- $15b
- Indicative completion
- 2039
- Funding status
- No Source
- Lead organisation
- NZ Transport Agency Waka Kotahi
- Election risk
- Extreme
Election risk assessment
Four-lane expressway to Whangārei is National's Roads of National Significance priority, would be cancelled or reduced under Labour/Green.
Government priority alignment
HIGH: RoNS four-laning of SH1 to Whangārei, a government flagship programme.
Recent changes
- 2026-W37Major Estimated value up 233%: $4.5b → $15b.
- 2026-W37Major Completion slipped 4 years: 2035 → 2039.
- 2026-W37Info Owner: Waka Kotahi NZ Transport Agency → NZ Transport Agency Waka Kotahi.
Chronology
- 2024Northland Corridor confirmed as a Road of National Significance
- 2025$187m funded for design, consenting and route protection
- 2026Consents/designations being lodged (Brynderwyns alternative first)
- 2026NZTA's July Major Transport Projects Pipeline confirms the Brynderwyns realignment proceeds first; sections two and three between Te Hana and Whangārei move to 'continuing more slowly' with no confirmed construction timeline
- 2026First section, Warkworth to Te Hana, signed as NZ's largest PPP (30 July, NZ$3.649b NPV; see that project). Sections north of Te Hana to Whangārei remain unfunded for construction
- 2039expectedFull corridor delivery targeted