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(Photo: Emma Mabin) A cage is lifted into one of four pile casings at Waokauri Bridge. Three 21 metre deep concrete bored piles that will support the future shared use path bridge have now been successfully completed.

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State Highway 20B Early Improvements Update

6 September 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 (SH20B).

Activities next week (6 -  13 September)

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

During the day (from 7am to 6pm)

Zone 1 (Pukaki Creek Bridge to East of Campana Road)

  • Vector Gas service protection works at Orrs Road
  • Earthworks and subgrade improvement placement between Orrs Road and Waokauri Bridge
  • Installation of network and storm water drainage and subsoil drainage Orrs Road to Waokauri Bridge
  • Deep lift asphalting pavement widening on the south side of the alignment between Pukaki Creek Bridge and Campana Road
  • Kerb and channel preparation between Pukaki Creek Bridge and Orrs Road
  • Common service trenching and duct installation along the Shared Use Path alignment between Waokauri Bridge and Orrs Road

Waokauri Bridge

  • Excavation works for the final headstock to Waokauri Bridge and the installation of temporary scaffold walkways to maintain pedestrian and cycle access on the southern side.
  • Demolition of the existing bridge walkway

Zone 2 (East of Campana Road to SH20)

  • Preparing subgrade west of the Manukau Memorial Gardens entrance
  • Removal of surcharge adjacent to the Manukau Memorial Gardens entrance
  • Watermain installation near SH20 with associated earthworks
  • Installing network drains across the Manukau Memorial Gardens entrance (at night)
  • Filling operation to the east of the surcharge
  • Installation of drainage between Prices Road and Manukau Memorial Gardens
  • Construction of new Variable Message Sign gantry footing east of Prices Road

Utilities(throughout the site)

  • Common services trench works starting this week from the west of Waokauri Bridge towards Orrs Road
  • Common services trench completed in front of Manukau Memorial Gardens

At night (all zones from 9pm to 5am under either stop/go or full road closure traffic management)

  • Exploratory works will continue beneath the existing road to verify the location of existing services at numerous locations.
  • Saw cutting of the existing road for new drainage crossings will continue.
  • Trenching works for ducting and drainage crossings at multiple locations throughout the site will be ongoing.
  • Night time paving works across the existing road will commence with localised adjustments to the traffic management arrangements.

SH20B has introduced the following safety measures to protect all road and shared path users including two temporary signalised road crossings for people on foot and on bikes:

  • All traffic must turn left both into and out of properties and side roads. Manukau Memorial Gardens is exempt from this
  • Vehicles turning into driveways and side roads on the southern side must watch for bike and foot traffic on the temporary shared cycle and walking path
  • Night time detours will likely be in place from Sunday to Thursday between 9pm and 5am.  Please follow the posted detour routes
  • The speed limit for SH20B is 50km/hr from Manukau Memorial Gardens to Tom Pearce Drive. Please drive safely and allow extra time for your journey.

Looking Ahead

An ongoing comprehensive programme of night works is in place to enable trenching for utility services and ducting at multiple locations across SH20B. Posted detours will be in place. We apologise for any inconvenience and thank you for your patience.

Please drive safely and allow extra time for your journey. 

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BUS ROUTE 380

Due to the road works on SH20B, please expect delays and allow extra time for your journey for those using Bus Route 380. Thank you for your understanding.

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Contact us

Please call us at 0800 796 796 or email sh20B@nzta.govt.nz if you have any questions about the SH20B Early Improvements project.

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Project overview

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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 www.nzta.govt.nz/projects/southwest-gateway/20connect/

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