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State Highway 20B Early Improvements Update

20 November 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).

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BEFORE: 9am Saturday 14 November

With major preparations taking place before the full weekend closure, work pouring the concrete base foundation for the new road begins at the eastern end of Pukaki Creek Bridge. 

 

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AFTER: 2:30pm Saturday 14 November

Less then six hours later, and a huge 326m3 of 40MPa subbase concrete has been laid. The approach to the bridge is left to dry in the afternoon sun. A huge effort across multiple teams!

 

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Weekend road closure works between 3 - 16 and 20 - 23 November have been completed successfully. Thank you!

The multiple works teams at SH20B would like to thank you for your patience over the last two weekend closures as we successfully completed major works on the closed road.

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MANUKAU MEMORIAL GARDENS ENTRY CHANGE

The entry to Manukau Memorial Gardens has been temporarily moved to the old entrance - closer to the interchange with SH20 - for approximately ten days.

This temporary arrangement will allow the SH20B project team to complete vital utilities and road building works at the main entrance.

We apologise for the disruption and thank you for your patience.

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Project progress

Activities next week (29 November - 6 December)

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

During the day (from 7am to 6pm)

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

  • Installing rip rap fabric for erosion and sediment control at Pukaki Creek Bridge
  • Pavement is being laid at the viewing platform on the northern side
  • Installation of northern lighting ducts
  • Fuel line works at Campana Road north.
  • Mechanically stabilised earth wall works on the north side of the road beside the Campana Road turn-off 
  • Vector is connecting the streetlights along the shared use path between Campana Road and Orrs Road
  • Completing joints and grout barriers at Campana Road south

Waokauri Creek Bridge

  • Installation of last FRP panels
  • Drilling the central headstock base plates and minor snag works under the bridge
  • Works to start on the transition barrier footings, steel fixing and concrete pouring

Zone 2 (from East of Campana Road to the SH20 interchange)

  • The main entrance to Manukau Memorial Gardens is now closed for upgrading and asphalting
  • Kerbs, channels and barriers are all being installed in front of Manukau Memorial Gardens
  • Final asphalt laid on the widened Manuakau Memorial Gardens area
  • 360 device installed for stormwater at Prices Road.
  • Sealing continuing at Prices Road northside along with preparation for putting terminal ends of the concrete barriers.

Utilities (throughout the site)

  • Fuel line protection work has started at the Campana Road intersection
  • Trenching to install the power ducts and other services continues toward Waokauri Creek Bridge
  • The changeover of power to the new network is  on schedule for mid December.

At night (all zones from 9pm to 5am, Sunday to Thursday)

  • Ongoing drainage works to verges and road crossings 
  • Continuing asphalt pavement replacement along the existing carriageway.

There will be no through traffic from SH20 interchange to the Tom Pearce Drive roundabout. Please follow the posted detour signs on SH20B.

Safety

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 left-turn movements
  • Vehicles turning into driveways and side roads on the southern side must watch for bikes 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 50kph from Manukau Memorial Gardens to Tom Pearce Drive, except at crossing points and coned paving areas where the speed will briefly drop to 30kph. 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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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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