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TRANSPORT
Upper Harbour Bridge and SH18 Upgrade
Waka Kotahi NZ Transport Agency · Auckland
Upgrades to the Upper Harbour Bridge and SH18 Western Ring Route including capacity improvements, geometric upgrades, and resilience works. Part of the NZTA's 2024–27 NLTP State Highway Improvements programme. Serves growing North Shore and upper harbour industrial areas.
B
68/100 · Likely to proceed
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
- Auckland
- Sector
- Transport
- Status
- Planning
- Estimated value
- $620m
- Indicative completion
- 2030
- Funding status
- Part Funded
- Lead organisation
- Waka Kotahi NZ Transport Agency
- Election risk
- Low
Election risk assessment
Included in 2024–27 NLTP. Bipartisan support as critical Auckland freight corridor.
Government priority alignment
HIGH — State highway improvement in the 2024–27 NLTP — GPS roads and resilience priority.
Chronology
- 2015SH18 identified as under-capacity for growing North Shore and Northwest Auckland freight flows
- 2020Upper Harbour Bridge resilience assessment identifies upgrade need
- 2022Business case developed for SH18 and Upper Harbour Bridge package
- 2024NLTP 2024–27 includes project as state highway improvement
- 2027Construction expected to begin
- 2030Target completion