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Project introduction

A project to improve safety and efficiency for road users on the stretch of State Highway 16 between Brigham Creek and Waimauku in Auckland.

  • Estimated project cost

    $70 million
  • Project type

    Safety improvements
  • Project status


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About the project

State Highway 16 between Brigham Creek and Waimauku is classified as a high-risk rural road for a reason. Four people have died and 30 have been seriously injured between 2006 and 2015. Over a third of these crashes were caused by drivers losing control and running off the road or crossing the centreline and hitting an oncoming vehicle.

We understand this road is an important link. Over 30,000 vehicles a day use the route between Brigham Creek and Kumeu, and 15,000 vehicles a day between Huapai and Waimauku. With vehicle numbers increasing we urgently need to make safety and capacity improvements before more people lose their lives.

To make SH16 safer, we’re looking at making these improvements:

  • Putting in flexible road safety barriers to catch drivers who leave their lane before hitting something harder like trees, poles, ditches or other vehicles. Flexible barriers will be installed along the road except between Taupaki and Kumeu.
  • Adding extra lanes between Brigham Creek and Taupaki roundabout (four lanes, two in each direction) to help improve travel times in the short-term, ahead of a longer term project to reduce hold-ups on this road.
  • Putting in a flush median, which is a painted area in the middle of the road to give you more room and a safe place to wait before turning, while traffic can continue to flow.
  • Building a roundabout at the SH16/Coatesville Riverhead Highway intersection to help traffic flow better and make it safer to turn.
  • Between Huapai and Waimauku, we are considering a safer and more appropriate speed, widening bridges that are too narrow and making it safer to turn into Foster, Station and Factory Roads.
  • Between Huapai and Waimauku creating a wider road shoulder so there’s more space for people who cycle.
  • Between Brigham Creek and Kumeu creating a dedicated shared path for people who walk and cycle.

View the project map [PDF, 270 KB]

The focus of this project is to improve safety in the short term, ahead of other long term projects that need a lot more time for consenting and planning processes. This project is the first part of a bigger package of work aimed at addressing growth and congestion in Auckland’s North West. This programme of work is called Supporting Growth.(external link)

Supporting Growth Programme(external link)

Project staging

There are two stages of this project. Stage one runs from Huapai to Waimauku and stage two is between the Brigham Creek roundabout and Kumeu. We’ve started on the section between Huapai and Waimauku where there are slightly less complexities and where half of the crashes were head-on. Work will start on this section while we confirm aspects of the design for stage two.

Project timeframes

Design for this Stage one is now complete, and we have begun preparing for initial works. We are continuing to work with landowners to buy the land we need to construct the project.

We were due to commence enabling work in April, beginning with relocating a gas main at Berry’s Bridge.  However, with the recent announcement on COVID-19 this means we need to stop non-essential services for a period of four weeks. Construction crews across the country will be working to close down Waka Kotahi NZ Transport Agency construction sites. This includes the works that were scheduled to start on Berry’s Bridge.

Our team is continuing to work on the design for Stage two.  Through consultation with the community, we have identified a significant number of additional project requirements and consequently we need a substantial increase in funding to implement this stage.  That application for additional funding has been made and we are expecting a decision on whether increased funding is available in mid-2020.

Updated timeframes are shown below.

Stage one: Huapai to Waimauku*

Stage two: Brigham Creek to Kumeu*