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Western Ring Route

Updated: 12 February 2014

Improving the Te Atatu Road Interchange (SH16)

The Transport Agency took one of its final steps to complete Auckland’s Western Ring Route with the start of construction to improve the Te Atatu Interchange on the Northwestern Motorway (State Highway 16).

The interchange will have all five ramps upgraded; the motorway widened with an additional lane in each direction, and improved walking and cycling facilities.

This project sits between two WRR projects currently underway -  Lincoln Road interchange and the Causeway upgrade,  so please drive with care as more sections of the northwestern motorway are narrowed and speed limits are reduced.

For more general information please see the Te Atatu website.

The causeway upgrade will widen and raise the Northwestern Motorway to add capacity and prevent flooding. Aerial view of SH16 Lincoln Road Interchange.

What is the Western Ring Route?

The completed Western Ring Route will be a 48 kilometre motorway alternative to SH1 and the Auckland Harbour Bridge via SH20, SH16 and SH18. It will bypass the city to the west and link Manukau, Auckland, Waitakere, and North Shore cities.

Improvements to existing interchanges will connect to new sections of motorway to create a single, seamless motorway between Redoubt Road in Manukau and Constellation Drive in Albany. Several new motorway links are already carrying traffic.

Completing the Western Ring Route has been designated as one of the government’s 7 Roads of National Significance (RoNS) projects, due to the contribution it will make to regional and national growth.

It is anticipated that the $2 billion project – the biggest ever to be undertaken by the NZ Transport Agency - will be completed by mid 2021.

Why is the Western Ring Route important?

Once completed and opened, the Western Ring Route will provide a bypass around the CBD for the large volume of traffic that travels across the region each day. This improved network efficiency, and the additional capacity provided by the completed route, will:

  • Make travel times shorter and more predictable
  • Support economic growth by enabling goods to be moved more quickly and improving business productivity
  • Take pressure off local roads
  • Improve the reliability of bus travel
  • Provide an alternative route in case of an incident on SH1
  • Provide faster access to Auckland International Airport
  • Reduce traffic congestion and air pollution