The Petone to Grenada road (P2G) will create an efficient transport connection between southern Lower Hutt and north Wellington/Porirua to support economic growth and productivity, and housing development.
October 2025
The NZ Transport Agency (NZTA) Board has approved a preferred route for the Petone to Grenada Road of National Significance Project (RoNS) and funding to seek route protection for the project.
The NZ Transport Agency Waka Kotahi (NZTA) Board has approved a preferred route for the Petone to Grenada Road of National Significance (RONs) project and funding to move to the next stage of consenting and route protection for the project under the Fast-track Approvals Act. The Board also accepted the design feasibility report for the Cross Valley Link Road (CVL).
This new road will create a vital connection between southern Lower Hutt (SH2) and north Wellington/Porirua (SH1), connecting communities and making it easier to get around the region. The preferred four lane road, approximately 6km long will include:
View larger Petone to Grenada preferred option map [PDF, 2 MB]
CloseThe P2G corridor has long been acknowledged as a much-needed strategic link that would provide economic benefits to the Wellington region.
Lower Hutt and Porirua are only 10 kilometres apart geographically, but the driving distance is 24 kilometres via SH2, SH1 and the Ngā Ūranga interchange, and almost 50 kilometres via SH58.
State Highway 1 and 2 suffer significant traffic congestion, with both state highways carrying over 70,000 vehicles daily. P2G will deliver significant travel time savings of up to 23 minutes at peak times between Lower Hutt and Porirua, and will remove around 10,000 trips from the SH1, SH2 and SH58 Wellington State Highway network.
The preferred connection supports planned housing growth of 3,000 dwellings directly and 30,000 dwellings in adjacent areas.
CloseP2G is identified jointly with Cross Valley Link (CVL) as a RoNS to unlock housing growth and contribute to the primary strategic priority of the Government Policy Statement on land transport (GPS), which is to support economic growth and productivity.
The Cross Valley Link is a route linking the south-eastern Hutt Valley with SH2. This would use existing local roads to connect into a new bridge over the Hutt River to improve access to industrial areas in Seaview and Gracefield, as well as to Wainuiomata and Eastbourne.
CloseThe Government Policy Statement on Land Transport (GPS 2024) requires NZTA to consider tolling for all new roads.
The Investment Case for Petone to Grenada recommends tolling to support the construction and maintenance of the road.
Once NZTA has completed further planning and design, the next step is to seek approval from the Minister of Transport to proceed to public consultation on tolling. If approved, public consultation will occur once construction funding is confirmed.
CloseThe next step for P2G is route protection. Route protection is the identification and protection of land for future public works, including transport projects like Petone to Grenada.
An important part of the process includes engaging with directly impacted people, partners and organisations. It also includes geotechnical and environmental investigations to assess the conditions in the ground and surrounding environment. This information helps progress the ongoing planning and design work to support the Fast Track Approvals Act application.
Fast-track website(external link)
CloseThe last detailed investigation into the Petone to Grenada Link Road took place in the mid-2010s. A 2017 review raised concerns about the resilience of the previously proposed alignment and recommended a redesign.
In 2018, a re-evaluation concluded that further work was needed to identify the best package of improvements. In 2024-2025 the route was reassessed, and a new preferred alignment has been identified. This updated route provides an efficient connection with significantly reduced earthworks by using tunnels, which helps enable a flatter alignment.
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