NZ InfraWatch
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TRANSPORT
Northland Transport — RoNS Corridor
Waka Kotahi NZ Transport Agency · Northland
National's Roads of National Significance project to upgrade SH1 between Auckland and Whangārei to expressway standard. Includes multiple sections totalling ~100km. Business case in development. Labour opposed this scope in favour of rail and public transport.
D
40/100 · At risk
Completion Probability — likelihood this proceeds on roughly its stated timeline.
Funding statusweight 30%
Delivery stageweight 25%
Election / policy riskweight 20%
Govt priority alignmentweight 12%
Project scaleweight 8%
Delivery agencyweight 5%
Key facts
- Region
- Northland
- Sector
- Transport
- Status
- Planning
- Estimated value
- $4.5b
- Indicative completion
- 2035
- Funding status
- No Source
- Lead organisation
- Waka Kotahi NZ Transport Agency
- 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 — GPS flagship programme.
Chronology
- 2009Northland expressway first declared a Roads of National Significance under first National government
- 2012Route designation study begins. Community opposition in some areas
- 2017Labour wins election — Northland RoNS paused. Some sections cancelled
- 2021Labour reconfirms partial cancellation; alternative investment in regional roads considered
- 2023National reinstates full Northland RoNS to expressway standard. Business case commissioned
- 2025Business case development underway. No funding committed
- 2035Aspirational target for first expressway sections north of Auckland