Southern Connection


With work on the new motorway connections progressing, the focus for the southern end of the project is completing the final OPGA pavement surface and construction of the Pūhoi on and off -ramps.

Information and schedule for completion works at the Southern Connection

  • Road layout change – North of Johnstone's Hill Tunnels – Sunday 26 March
  • SH1 overnight road and ramp closures – 19 March to 30 April 2023

 Please check the information and schedules below regularly for any changes so you can plan ahead and avoid congestion.

SH1 Road layout change – North of Johnstone's Hill Tunnels

From Sunday 26 March northbound travellers will exit off at the Pūhoi northbound off-ramp and be directed onto a short section of Pūhoi Road and then back onto the existing SH1. This change will be always in place until the safer, more resilient and reliable route fully opens in the second quarter of 2023.

This layout change allows the team to work safely in areas currently used by SH1 traffic as we prepare to move this section of the motorway into its final layout.

A temporary speed limit of 30km/h will be in place, and there will be traffic management (stop/go at peak times and temporary traffic signals at off-peak times) to assist with access to and from Pūhoi village. 

Southbound traffic will continue to use the same route, however the southbound Pūhoi on-ramp moves towards its final layout of one lane with northbound traffic no longer using the ramp.

NX2 asks road users to take care while they adjust to the new road layout and stick with the temporary speed limits. Allow extra time when travelling through this area, especially during peak periods including Easter. 

There may be some delays around the peak travel times.  While all efforts have been made 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

SH1 overnight road and ramp closures

There are night works associated with the new layout change, and are scheduled to take place as follows:


Dates and Times


Road layout change preparation work 

Thursday 23 March

(9pm to 5am)

Thursday 23 March – SH1 will be closed in both directions northbound and southbound – from Silverdale to Johnstons Hill Tunnels.  Detours will be in place via Hibiscus Coast Highway and/or SH16

Final pavement surfacing and barrier installation

Sunday 26 March to Thursday 30 March

Sunday 2 April to Wednesday 5 April

Tuesday 11 April to Thursday 13 April (contingency dates)

(9pm to 5am)

State Highway 1 will be closed in both directions northbound and southbound – from Silverdale to Johnstons Hill Tunnels

Detours will be in place via Hibiscus Coast Highway and/or SH16

Completion of southbound Pūhoi on ramp

Sunday 16 April to Thursday 20 April

Sunday 23 April to Thursday 27 April (excluding ANZAC Day)

(9pm to 5am)

SH1 southbound from Pūhoi to Silverdale. 

All SH1 traffic heading south will be detoured via Hibiscus Coast Highway, and back onto SH1 at Orewa

In the event of bad weather or other unforeseen circumstances, this work may be moved to the next suitable night/s. Road users are encouraged to keep checking here, Facebook @aratuhonopuhoitowarkworth and/or Waka Kotahi Journey Planner for up to date information.

People are encouraged to travel outside peak hours if they can or leave earlier than they normally would.

Waka Kotahi and NX2 would like to thank local residents and motorists for their patience while we undertake this important work.


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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.