As we progress work to fully 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.

Work will take place over two weeks in mid-October, with four nights of full road closures during this time.

• 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 9pm 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.

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

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