NZ InfraWatch
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TRANSPORT
Cambridge to Piarere Expressway (Waikato RoNS)
Waka Kotahi NZ Transport Agency · Waikato
Budget 2026 committed $1.77B to build this 16km four-lane expressway linking Cambridge to Piarere, completing the connection between the Waikato Expressway (SH1) and the Tauranga Eastern Link (SH29). Critical freight corridor linking Auckland, Hamilton, and Tauranga. Construction underway.
A
92/100 · Very 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
- Waikato
- Sector
- Transport
- Status
- Under Construction
- Estimated value
- $1.8b
- Indicative completion
- 2031
- Funding status
- Fully Funded
- Lead organisation
- Waka Kotahi NZ Transport Agency
- Election risk
- Low
Election risk assessment
Fully funded in Budget 2026 with $1.77B committed. Construction underway. Bipartisan support as critical freight link completing the Hamilton–Tauranga expressway corridor.
Government priority alignment
HIGH — RoNS, fully funded in Budget 2026 — a core GPS priority.
Chronology
- 2010Waikato Expressway planning identifies Cambridge–Piarere as critical missing link for Tauranga freight
- 2016Route designation confirmed. Alignment through Cambridge and Piarere finalised
- 2022Business case advanced. Environmental assessment complete
- 2023NLTP 2024–27 includes project as Roads of National Significance
- 2026Budget 2026 commits $1.77B — project fully funded. Construction begins on 16km Cambridge–Piarere section
- 2031Target completion — completing Hamilton to Tauranga expressway connection