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Auckland Transport

Huapai Triangle Special Housing Area Huapai Triangle Special Housing Area

Auckland Transport will soon commence the first of two related projects to upgrade roading infrastructure at Kumeu and Huapai to serve the new Huapai Triangle Special Housing Area (SHA) in the north-west sector of Auckland.

Project status: Design
Project zone: West

Project overview

The SHA comprises 1200 dwellings including a retirement village.

It is located in a triangle of land (Huapai Triangle) bounded by the Auckland-Northland Railway to the north, which runs parallel to SH16, Station Road to the north-west and Nobilo Road to the north-east.

Upgrades will include the following areas:

  • The connection between SH16 and Station Road at Huapai where the existing intersections will be upgraded by shifting westwards and signalisation of the existing Station Rd intersection. Road building is expected to commence on this upgrade in mid 2021
  • The intersection of SH16 and Access Road. Also, an additional 100 metre exit lane from Access Road added to the scope of work recently. Works for this upgrade are expected to commence in mid 2021
  • CABRA Developments Ltd, have upgraded a section of Station Road. Also, it contributed the funding on barriers and fencing at the level crossing at Access Road.

These indicative dates are subject to funding.


  • Increased road capacity for traffic volumes generated by the Huapai Triangle Special Housing Area (SHA) in north-west Auckland
  • Future proofed accessibility to the area
  • Improved safety at controlled intersections and fair interchange of traffic between side roads and SH16
  • Better moderated flow of SH16
  • Improved walking and cycling routes
  • These improvements address issues of intersections and corridor capacity, safety and connectivity.


  • Detailed design for SH16/Access Road Intersection and the extra traffic lane in Access Road is underway, construction is expected for mid 2021
  • Station Road connection (signalised intersection) – detailed design to start third quarter 2020. Construction expected in mid 2021.

Project details

The principal connection to SH16 for SHA traffic is projected to be via Station Road north to SH16. An alternative route is to the south via Access Road. This intersects SH16 at Kumeu.

The primary purpose of the upgrades for which AT is responsible is to upgrade the capacity of the two intersections and their ability to cater for:

  • increased volumes of traffic on SH16;
  • improved safety and better management of traffic between SH16 and Station and Access Roads;
  • Cabra Developments Ltd have upgraded Station Road between Nobilo Road and the pedestrian crossing near Huapai District School.

Huapai - SH16 Station Road intersection

Redesigned intersection layout has replaced the previous gyratory design.

The new proposal to connect Station Road and SH16 is at preliminary design stage and has been agreed in principle by Auckland Transport, New Zealand Transport Agency (NZTA).

The gyratory design has been changed due to the high level of investment required for an option that will not be needed when the Huapai bypass is built.

The new proposal provides the shifting westwards and signalisation of the existing Station Rd intersection and to include new walking and cycling facilities along Station Rd. The upgrades will allow for the increased traffic, and to provide better safety for drivers and pedestrians.

Improvements planned to SH16 and Station Road intersection will enable:

  • upgraded intersection at Station Rd/SH16;
  • realignment of Station Road intersection with SH16 approximately 40m west of its current position;
  • signalised intersection;
  • short right hand turning lane on SH16 eastbound approach into Station Road;
  • short left hand turning lane on SH16 westbound approach into Station Road;
  • cycling and pedestrian connections from Station Road to Main Road/SH16;
  • improvements at Station Road intersection address issues related to safety and connectivity.

Kumeu - SH16 Access Road intersection

Improvements planned to SH16 and Access Rd intersection will enable:

  • extension of the double laning of the SH16 westbound approach to the Access Road intersection;
  • extension of the double laning of the SH16 eastbound exit from the Access Road intersection;
  • a left turn lane added to the SH16 westbound approach to Access Road intersection;
  • a new shared path on the southern side of SH16;
  • advanced stop boxes for cyclists on SH16;
  • an additional 100m exit lane from Access Road;
  • improved Access Road outlet to SH16:
    • a new left turn slip lane between the new western kerb and a new traffic island which will reduce the distance pedestrians and cyclists are required to travel to cross of SH16 (north/south) at this point therefore enhancing safety;
    • with a new pedestrian maze in Access Road on the eastern side of the level crossing;
    • with improved warning of the approach of trains.
  • providing a controlled east-west pedestrian and cycle crossing over Access Road;
  • further developments to the level crossing are planned between KiwiRail and SHA developers CABRA Developments Ltd. CABRA Developments Ltd. are funding KiwiRail’s safety upgrades to the level crossing.

The space for widening SH16 has been obtained by shifting the roadway northwards to occupy the planted median on the northern side of SH16, which forms the boundary between SH16 and a service lane to its immediate north. This has also required reconfiguring of the parking and traffic flows in the service lane.

Plan for SH16 and the Access Road intersection

Improvements planned to SH16 and Access Road intersection.

Station Rd Huapai Improvements map December 2020.

Download the map showing the improvements for Huapai Triangle Special Housing Area (PDF 669KB).

Download the Huapai SHA General Arrangement Plans (PDF 7.2MB).

Download the detailed plans for Access Road Improvements (PDF 1.3MB)

Additional information about the SHA

The Huapai Triangle Special Housing Area Roading Infrastructure Upgrade Project (Huapai SHA Project) responds to a requirement created by the Huapai Triangle Special Housing Area (SHA) of 1200 dwellings.

This SHA was permitted by the Government and Auckland Council in 2013. Signatories to the resulting contract were:

The Consenting Authorities:

  • Government.
  • Auckland Council.

The developers:

  • Todd Holdings Ltd. 
  • CABRA Developments.

Todd Developments has since withdrawn from the Special Housing Area.

The Infrastructure providers/owners:

  • Auckland Transport.
  • NZTA.
  • KiwiRail.

History of the SHA

In 2014 the Government entered into a Housing Accord with Auckland Council to build Special Housing Areas (SHAs). The first of these was the Huapai Triangle Special Housing Area which provided for the building of 1200 dwellings in a triangle of land at Huapai, bounded by Station Road, Nobilo Road and the Auckland – Northland Railway.

In 2015, there was an agreement between Auckland Council, NZTA, KiwiRail, AT and the then developers, Todd Property Group and CABRA Developments to upgrade the existing roading infrastructure to support the Huapai SHA development (Todd subsequently withdrew).

An Infrastructure Funding Agreement (IFA) was signed in 2017 with CABRA. This creates a broad time-frame which AT must deliver in stages of the agreed works. At the time of the concord to create the SHA, a plan was agreed for upgrading of roading infrastructure to serve the new SHA.

For more information on this project

Contact Auckland Transport