Upcoming closures on Hamilton section of Waikato Expressway


SH1 motorists can expect periodic road closures and detours over the next two months as the Hamilton section of the Waikato Expressway heads to a mid-year completion.

The closures are needed for tie-in works, erection of large overhead multi-lane gantry signs and tree-felling.

March 14 - March 18

Ngāruawāhia south-bound closure for gantry installation, with traffic management of vehicles on north-bound lanes. Follow detour route between 7pm-6am.

March 21-24

Ngāruawāhia north-bound closure for Hamilton section barrier removal. Follow detour route between 7pm-6am.

March 21-24

Tamahere full overnight closure for gantry installation. Follow detour route between7pm-6am

March 23- April 30

Day-time tree-felling will take place on SH1 between the Southern Interchange and Newell Road between 9am-3pm. Dates and times will vary depending on bat monitoring results and weather.

Traffic management will include:

  • Shoulder closure – no delays
  • Stop/Stop traffic management on north and south lanes as trees come down – minor delays
  • North-bound lane closures and detours via local roads or SH21/3 for freight – allow 15-20 minutes on detours
  • Partial or full closures at Newell Road-SH1 intersection as required – allow 5 minutes to use alternative route

There will be no work on or between Easter (April 15-18) and Anzac Day (April 25).

Waka Kotahi NZ Transport Agency notes the closures ahead are subject to weather and any Covid-resourcing issues:


The Ngāruawāhia detour route is via Great South Road through Ngāruawāhia from the Horotiu and Gordonton Road interchanges. High Productivity and Over-Dimension vehicles are advised to use SH26 and SH1B due to the weight restriction on the town's bridge.

The Tamahere closure requires detour routes including the state highway network of SH26 and SH1B and wider routes SH2/27, SH3 and SH21. Local property access will be maintained past the detour cordons, including to Newell Road.

Waka Kotahi thanks road users for their patience while this work is carried out.