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Waka Kotahi NZ Transport Agency is improving State Highway 20B (SH20B) to provide a safer journey experience and more reliable travel choices with a new bus and Transit 3 lane each direction between Pukaki Creek Bridge and the interchange with State Highway 20.

SH20B improvements are the first step of the Southwest Gateway programme, which will provide better public transport, walking and cycling facilities as well as safer and more efficient movements in Southwest Auckland.

To provide safer and more reliable journeys on SH20B, we want to hear from you on the proposed:

  • Speed limit change from current 100km/h to 60km/h
  • Bylaw on the dedicated bus and Transit 3 (T3) lanes.

Complete our survey(external link)

Feedback closes on Wednesday 4 November at 5pm.

Safer speed review

We are proposing the speed limit on SH20B between Manukau Memorial Gardens and Orrs Road be reduced from 100km/h to 60km/h. 

Location Current speed limit Proposed new speed limit
Existing 100km/h area on SH20B between Orrs Road and the current 100/50km/h change point east of Manukau Memorial Gardens intersection – reduce from 100km/h to 60km/h. 100km/h 60km/h

More than 28,000 vehicles travel along SH20B each day. With a new road layout, new walking and cycling facilities, new intersections and future development planned, we want to make the state highway safer for everyone who travels along it.

In November 2019 Waka Kotahi asked for feedback on our proposed speed limit changes on this road once construction is complete. 86% of people said they’d like to see a reduced speed limit on this section of the state highway. Of these, 76% of people supported a reduced speed limit of 60km/h for a safer corridor.

Southwest Gateway - Engagement Summary Report - November to December 2019(external link)

We’ve read all the feedback and used these insights along with our technical analysis to inform our design. We want to hear your views on the proposed change before we make a decision as per the Land Transport Rule: Setting of Speed Limits (2017).

Bus and T3 lane bylaw 

Waka Kotahi also proposes a dedicated bus lane in each direction between Pukaki Creek Bridge and SH20/SH20B interchange to provide more reliable public transport services and support frequent bus services between the airport and Puhinui Station Interchange.

To maximise efficiency of the new lanes, our proposal also allows vehicles with three or more people (T3) to use the new bus lanes, to reduce congestion and ease pressure in SH20B.

These lanes will be operational 24 hours, seven days a week once the early improvements work is complete in 2021. Formal consultation on the bus and T3 lane bylaw is required under Section 22AD of the Land Transport Act 1998.

Have your say

You can provide your feedback by either:

Post your completed consultation form to:

SH20B public consultation team (Attention: Austin Kim) 
Waka Kotahi NZ Transport Agency
Private Bag 106602
Auckland 1143

Or email the form to: SH20B@nzta.govt.nz

Feedback closes on Wednesday 4 November at 5pm.

For more information read the frequently asked questions 

What happens next

Based on the feedback we receive and our own technical analysis if we decide to change the speed limit and create the new bylaw the new speed limit and bus/T3 signs and lane will be implemented when we complete the early works project in early to mid 2021.

The new speed limit and priority lanes would be implemented upon completion of the SH20B improvement works. (early - mid 2021).

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