Northern Corridor decision confirmed

30 November 2017

An independent Board of Inquiry has released its final decision giving approval to the Northern Corridor Improvements proposal.

The approval gives the green light to construction of the last link of Auckland’s Western Ring Route, providing an alternative route from South Auckland to the North Shore.

The new road will create an uninterrupted motorway-to-motorway connection along the Western Ring Route – the Hobsonville, Northwestern and Southwestern Motorways (SHs18, 16 and 20) - between Albany and Manukau to the south, upgrading the Upper Harbour Highway to a motorway, and extending the Northern Busway from Constellation Drive to the Albany park-and-ride station.

  • Download the final decision and report​

Notes for editors

The Board released a draft decision on 9 October 2017, and received comments from six parties. After considering the comments received on the Draft Report and Decision, the Board has made a number of ‘minor and technical’ changes and these have been incorporated into the Final Report and Decision.

The Board’s decision can be appealed, only on questions of law, to the High Court under section 149V of the Resource Management Act 1991 (RMA) by the New Zealand Transport Agency (the applicant), Auckland Council (the local authority), all submitters on the Proposal and the Minister for the Environment.


Boards of inquiry are appointed by the Minister for the Environment (sometimes in conjunction with other ministers), to make independent decisions on proposals of national significance (these are considered exceptionally large and complex proposals with regional or national impacts).

The EPA supports the decision-making process, as set out in the Resource Management Act (1991) by providing administrative and secretariat support to the BOI, and supports those who opt to make submissions as part of the public decision-making process.

For further reading

  • Understanding the resource management process 
  • Background on the Northern Corridor Improvements proposal

For more information, please contact