Southern Connection

Overview of the works

The ‘Southern Connection’ works involve a four-stage construction sequence to connect State Highway 1 (SH1) north of the Johnstones Hill Tunnels to the new motorway.  Stage 4b work will enable works to happen in the median north of the tunnels, where it will eventually allow two lanes in each direction to connect to the new section of motorway still under construction.

October 2022

As we progress work to link the new motorway to the existing State Highway 1 at Johnstones Hill Tunnels (JHT) we will be making further road layout changes to the Southern Connection.

We encourage you to plan your journey over the next couple of weeks as this work will involve lane changes and at times full road closures.

  • Sunday 9 October – SH1 closure both directions – Silverdale to Johnstone Hill Tunnels northbound and Pūhoi to Grand Drive southbound. The detour will be via State Highway 16 and local roads, from 10pm to 5am.

  • Sunday 16 October  – SH1 closure northbound only – Silverdale to Johnstone Hill Tunnels. The detour will be via State Highway 16 and local roads, from 10pm to 5am.

  • Monday 17 October – SH1 closure both directions – Silverdale to Johnstone Hill Tunnels northbound and Pūhoi to Grand Drive southbound. The detour will be via State Highway 16 and local roads, from 10pm to 5am.

  • Wednesday 19 October – SH1 closure both directions – Silverdale to Johnstone Hill Tunnels northbound and Pūhoi to Grand Drive southbound. The detour will be via State Highway 16 and local roads, from 9pm to 5am.

From Monday 10 to Wednesday 19 October, the northbound tunnel will be closed and traffic travelling in both directions will use one side each of the southbound tunnel using a contraflow. From Thursday 20 October, a slightly new road layout will be in place.  Please drive with caution and keep to the sign posted speed limit.

While the dates are fixed, bad weather may cause works to be postponed and rescheduled – we will keep you up to date.

The detour route via SH16 is suitable for HPMV’s.  The free route will remain open during this time.

While we will try to limit disruption to traffic flows, road users should plan ahead by checking the Waka Kotahi journey planner. https://www.journeys.nzta.govt.nz/ before heading out and allow more time for their journey.

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Pūhoi on- and off-ramps

South-facing on- and off-ramps have been built at Pūhoi. This means if you are heading north, you can exit at Pūhoi and you can also go south by joining the motorway at Pūhoi..

The new Pūhoi on-ramp currently has both north-bound and south-bound (bi-directional) traffic using it. This is temporary and will remain in place until the motorway opens, it will then revert to a south-bound on-ramp only.

Motorists travelling north will have the option of exiting at the on-ramp and re-joining SH1 or exiting at the Pūhoi off-ramp onto Pūhoi Road.

SH1 south of Pūhoi Road through to 1378 Hibiscus Coast Highway will become a one-way road for south-bound traffic only. This will remain in place until the opening of the new motorway.