SH20 Manukau Harbour Crossing

The SH20 Manukau Harbour Crossing is a key part of the Western Ring Route. Once completed, the Western Ring Route will provide a genuine alternative to SH1 between Manukau City and Albany via SH20, SH16 and SH18.

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Bridge walk open day

25 July 2010

Come along and walk over the newly built Mangere Bridge before it opens for traffic!

The open day will be from 10am to 2pm.

Early completion - now 31 August 2010!

Exciting changes have been afoot at the Manukau Harbour Crossing Project over the last few months:

  • Early project completion, 7 months ahead of the original schedule, was announced by Minister of Transport Steven Joyce in February 2010.
  • A third north-bound lane was recently opened, immediately eliminating the long and frustrating traffic queues that had been part of the daily grind home.
  • The eye-catching blue cable-stay Beachcroft Avenue pedestrian and cycle bridge was officially opened by Mayor Banks - creating a unique passage between Hillsborough and Onehunga.

Further exciting changes are on the way, with key dates coming up for the project including:

  • Public open day - late July 2010
  • Some south-bound traffic lanes opening on the new bridge - late July/early August 2010
  • Onehunga Harbour Road pedestrian and cycle bridge opening - August/September 2010
  • 3 lanes open south bound - late August 2010
  • Project completion - 31 August 2010
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Quick Links

SH20 Walmsley Upgrade ProjectSH20 is a key section of the Western Ring Route. The Walmsley upgrade works will contribute to the regional benefits created by the upgrade of this important link.More

Traffic This page provides the latest information about traffic management surrounding the project.More

Walking and Cycling Improvements The Manukau Harbour Crossing project includes local cycling and walking improvements, to make it easier to get around on foot or by bicycle.More

FAQsFrequently Asked Questions about the Manukau Harbour Crossing project More

Media Releases

New Manukau Harbour crossing now fully open

Weather permitting, the NZ Transport Agency says all lanes on the upgraded Southwestern Motorway [SH20] between Walmsley Road and Queenstown Road will be open and fully functioning from 5am tomorrow [Wednesday 1 September].