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Western Ring Route

Updated: 25 May 2015

The Northwestern Upgrade on State Highway 16 and the Waterview Connection on State Highway 20 are completing the Western Ring Route. 

The causeway upgrade will widen and raise the Northwestern Motorway to add capacity and prevent flooding.

Queen's Birthday works on SH16

SH16 closed in both directions between Te Atatu and Lincoln Roads from 8pm Sat 30 May to 8am Sun 31 May. 

Click here for more information.

The Western Ring Route

The route will be an alternative to State Highway 1, linking Manukau, Auckland, Waitakere and the North Shore, improving network resilience, travel time reliability and bus shoulder lanes, and upgrading cycleway and pedestrian facilities.  Five contracting teams are delivering the work for the NZ Transport Agency, and the projects are due to be completed in early 2017 when the Waterview tunnels open.  The completed Western Ring Route will be a 48 kilometre motorway alternative to SH1 and the Auckland Harbour Bridge, bypassing the city to the west.

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 the Western Ring Route is important

When it is 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:

  • Provide better motorway connections from Manukau to Waitakere, the central city and Albany
  • Improve travel time reliability
  • Improve public transport along the route
  • Help ease pressure on local roads
  • Provide more reliable access to/from Auckland International Airport
  • Enhance pedestrian and cycling facilities
  • Increase access to Auckland’s western suburbs, supporting planned commercial and residential expansion in that area