Ara Tūhono – Pūhoi to Warkworth


State Highway One (SH1) – Road closures – Northern Connection & Southern Connection – November and December 2022

As we progress towards completing the new motorway, we are now at the stage where we need to connect parts of the new road with the existing motorway and State Highway 1 (SH1), this means there will be several road closures on SH1 in both the north and the south during November and December.

We will start this work at the Northern Connection where the project team will carry out median island works and northbound widening works.  To carry out this work safely a series of road closures will be in place from 9pm to 5am

  • Sunday 20 November to Thursday 24 November (Detour via Kaipara Flats/Woodcocks Road)
  • Sunday 27 November to Thursday 1 December (Detour via SH16)
  • Sunday 4 December to Thursday 8 December (Detour via SH16)
  • Sunday 11 December to Thursday 15 December (Detour via Kaipara Flats/Woodcocks Road)

There is a wider network closure of SH1 from Wellsford to Warkworth (for work resurfacing) from Sunday 27 November to 1 December and again on Sunday 4 December to Thursday 8 December with a detour via SH16. 

Our project team and Waka Kotahi Maintenance teams are once again working together to ensure that we capitalise on these closures and get as much work done as possible in order to minimise disruptions.

At the Southern Connection the project team will undertake work from the Johnstons Hill Tunnels (JHT) up to Pūhoi on the ITS gantry, signage installations and traffic management works (i.e., barrier removal, line marking).  This means SH1 will be closed in both directions – Silverdale to Johnstone Hill Tunnels northbound and Pūhoi to Grand Drive southbound. The detour will be via State Highway 16  or Hibiscus Coast Highway for local traffic, from 10pm to 5am.

  • Sunday 27 November to Thursday 1 December
  • Sunday 4 December to Thursday 8 December
  • Sunday 11 December

From Sunday 4 December to Sunday 11 December there will be a minor road layout change at the Southern Connection with both southbound and northbound traffic using the southbound tunnel.

While we will try to limit disruption to traffic flows, we encourage you to plan your journey over this time and check the Waka Kotahi Journey Planner before heading out

Over Dimension vehicles will be able to get access through the both the work sites during these closures at specific times.  Heavy vehicles can use the detour routes or take State Highway 16.

We appreciate the P2W project works have been ongoing and that residents have endured continued disruptions over the years. We are working hard to complete this work before the busy holiday period, and we will be off the road mid-December and back early in the new year, to apply the final OPGA road surface at the northern and southern ends.


The Pūhoi to Warkworth project will extend the four-lane Northern Motorway (SH1) 18.5km from the Johnstones Hill Tunnels to just north of Warkworth. It is the first stage of the Ara Tūhono – Pūhoi to Wellsford project, and will now open in 2023.

Ara Tūhono means a connecting pathway (Ara meaning pathway/passage and Ara Tūhono means connecting or linking one part to another).

The highway will be built to the west of the existing SH1 and bypass Warkworth on the western side. It will be a four-lane dual carriageway, separated by a central median with a safety barrier.

Key benefits of the new route include improved safety and connectivity, more reliable journey times and a better freight connection for the Northland region.

P2Wk Route Map

The Pūhoi to Warkworth project is a PPP (Private Public Partnership) between the Government and a private consortium, the Northern Express Group (NX2).

While the NX2 private-sector consortium will be responsible for financing, designing, building, maintaining and operating the motorway for up to 25 years, the motorway will remain a public asset.