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TRANSPORT
Christchurch Southern Motorway — Rolleston Extension
Waka Kotahi NZ Transport Agency · Canterbury
Extension of the Southern Motorway (SH1) south of Christchurch through Halswell and Prebbleton to Rolleston. Key freight route for South Island. Serves Selwyn — NZ's fastest-growing district. 2024–27 NLTP includes it as a Roads of National Significance project.
C
61/100 · Uncertain
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
- Canterbury
- Sector
- Transport
- Status
- Planning
- Estimated value
- $1.1b
- Indicative completion
- 2032
- Funding status
- Part Funded
- Lead organisation
- Waka Kotahi NZ Transport Agency
- Election risk
- Medium
Election risk assessment
Road of National Significance for Canterbury's growing southern corridor. In 2024–27 NLTP. Labour preferred public transport investment in Christchurch.
Government priority alignment
HIGH — RoNS southern motorway serving NZ’s fastest-growing district — GPS priority.
Chronology
- 2012Southern Motorway designation extended south of Christchurch toward Rolleston
- 2018First sections of southern motorway (Christchurch to Halswell) open to traffic
- 2022Planning for Halswell to Rolleston extension advanced. Selwyn District's rapid growth drives urgency
- 2023NLTP 2024–27 includes Rolleston extension as Roads of National Significance
- 2027Construction expected to begin
- 2032Target completion — full Christchurch to Rolleston expressway