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What are 'service investigation works' and why are they important? In this picture our team found 17 different service ducts in just one location. Capturing exactly where services are buried helps us plan our future works.


State Highway 20B Early Improvements Update

22 May 2020

Kia ora koutou,

State Highway 20B Project Updates keep you up-to-date with project progress and upcoming physical works on State Highway 20B.

What we did last week (11 – 18 May)

  • Continued outfall drain works and vegetation clearance on the eastern side of Manukau Memorial Gardens
  • Constructed a lifting pad near the entrance of Manukau Memorial Gardens for the installation of a large manhole chamber
  • Prepared for the installation of wick drains at Manukau Memorial Gardens
  • Installed erosion and sediment controls between the Auckland Airport Aviation Security gate and Pukaki Creek Bridge
  • Continued earthworks at multiple locations between Pukaki Creek Bridge and Campana Road
  • Carried out service location works throughout the site
  • Removed existing street lights between Pukaki Creek Bridge and Orrs Road
  • Started storm water drainage between Campana Road and Pukaki Creek Bridge
  • Started service location investigations at the Aucklanad Airport public viewing platforms

Activities for this week (18 - 25 May)

  • Crane lift to install a large manhole chamber near the entrance to Manukau Memorial Gardens
  • Topsoil stripping and undercut works at Manukau Memorial Gardens
  • Preparation for installation of wick drains at Manukau Memorial Gardens
  • Steel fixing and formwork on the corbels at Waokauri Bridge
  • Continuing earthworks at multiple locations between Pukaki Creek Bridge and Campana Road
  • Continuing service location works throughout the site
  • Continuing storm water drainage at the Auckland Airport public viewing platforms

What’s happening next week (25 May 1 June)

  • Continuing wick drain installation and fence works at Manukau Memorial Gardens
  • Continuing undercut works and backfilling at Campana Road
  • Restarting fuel line excavation at Campana Road
  • Continuing service investigation works
  • Digging out soft material at the culvert extension and backfilling with granular material ready for drainage at Manukau Memorial Gardens

Please note that these works are weather dependent and may be delayed.

Looking ahead

  • Utility service works across Puhinui Road at night
  • Installation of an 18-tonne bridge beam at Waokauri Bridge.



For residents in Campana and Prices Roads, please be mindful of truck movements between 7am and 7pm.  Please ensure children and animals are supervised when using these roads.

The speed limit for SH20B is 50km/h from Manukau Memorial Gardens to Pukaki Creek Bridge. Please drive safely and allow extra time for your journey.



Contact us

Please call us at 0800 796 796 or email if you have any questions about the SH20B Early Improvements project.



Project overview


Waka Kotahi NZ Transport Agency and Auckland International Airport Limited are upgrading State Highway 20B for better and more reliable travel options with a new shared path and additional priority lanes between Pukaki Creek Bridge and State Highway 20.

This project will integrate with improved transport facilities within the airport precinct along SH20B and at the upgraded Puhinui Station Interchange.

The project is the first step of the Southwest Gateway programme to provide better public transport, walking and cycling facilities with safer and more efficient freight movements to, from and around Southwest Auckland.

Fulton Hogan undertakes this work on behalf of Waka Kotahi.

Key early improvements on State Highway 20B to be delivered by 2021 include:

  • A safe place for people to walk and ride bikes
  • Safety improvements including central median barrier protection, improved lighting and a reduced speed
  • Improved pavement, drainage and stormwater treatment
  • Two improved intersections at Campana Road and Manukau Memorial Gardens.

Waka Kotahi NZ Transport Agency works to create transport solutions for all New Zealanders – from helping new drivers earn their licences, to leading safety campaigns to investing in public transport, state highways and local roads.

For more information on the project, you can also visit our website at