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Thursday 26 November 2020

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Emerging preferred corridor announced for Whangārei to Port Marsden Highway

Kia ora,

Today we announced an emerging preferred corridor for the SH1 Whangārei to Port Marsden Highway project.

The project will provide an upgraded 22km four-lane corridor that will improve transport connections between Auckland and Whangārei. It is part of the New Zealand Upgrade Programme’s $6.8 billion investment to save lives, get regions moving and boost productivity in key growth areas.

Since our last update, our project team have been busy conducting further technical investigations, undertaking options assessment and analysing community feedback in order to identify an emerging preferred corridor.

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The emerging preferred corridor is 'Option A'.

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Identifying the emerging preferred corridor

Of the two shortlisted options consulted on in October, the emerging preferred corridor is ‘Option A.’

The emerging preferred corridor includes upgrading the current state highway to four lanes (with some sections built on a new alignment to straighten out curves), with a separated walking and cycling path between Whangārei and Port Marsden Highway (SH15).

Option A has been selected as the emerging preferred corridor as it

  • provides for a shorter and more direct route than the shortlisted ‘Option E’
  • makes the best use of existing transport assets (being the existing SH1 corridor)
  • will result in one corridor to operate and maintain, whereas Option E would allow local traffic on a section of road through an area with safety and resilience issues
  • supports a shared path adjacent to the upgraded corridor which will provide a shorter and more direct route for pedestrians and cyclists
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Confirming the preferred corridor

Confirmation of the preferred corridor will occur through the development of the business case which is due for completion mid-2021.

The width of the emerging preferred corridor currently varies between 25 – 250 metres and will be refined over the coming months through ground investigations, landowner consultation and design work.

The design of the road within the emerging preferred corridor is at a very early stage of development. Design detail including the form of intersections, access points and location the shared path are not yet known. We have included a cross section below of what the highway could look like.

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What happens next?

Over the next three weeks, we will be meeting with landowners within the emerging preferred corridor to discuss individual property impacts in more detail.

Ground investigations and survey work will get underway over summer to assist the team in confirming the location of the four-lane highway within the corridor. Environmental assessments will also get underway and the designers will be looking at local road connections and access points along the highway.

At this very early stage in project development we don’t have all the answers but will work to share information with you as the project develops.

We also plan to host community events in February so you can meet the project team and find out more about the work we’re doing.

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Engagement summary

In early October, we announced two shortlisted route options for SH1 Whangārei to Port Marsden Highway and invited people to share their feedback with us. You can read a summary of this feedback on our website.

Click here to read the engagement summary.

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More information

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For more information on the SH1 Whangārei to Port Marsden Highway project, contact us at W2PMH@nzta.govt.nz

Visit our website www.nzta.govt.nz/w2pmh

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