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State highway projects

Our role in managing New Zealand's state highways includes working with the government and partners throughout the country to identify and respond to opportunities to improve safety, capacity and efficiency on our roads. One of our key goals is to support economic growth and productivity throughout New Zealand. Together, we develop projects based on thorough analysis and, where appropriate, extensive consultation to ensure they can be implemented cost effectively while delivering immediate and long-term gains to road users and the economy as a whole.

Currently active projects are listed below. For completed state highway projects, view the completed projects section in the navigation.

SH1 Ellerslie Widening Project.

Updated: 24 November 2014

The NZ Transport Agency is working with Auckland Transport and KiwiRail to progress Stage Two of the SH1 Ellerslie Widening Project. Stage Two involves the construction of an additional northbound lane from Ellerslie-Panmure Highway on-ramp to just after the Main Highway overbridge.

The widening of the motorway will increase this section of motorway from three to four lanes, ensuring a continuous northbound lane which will help to ease congestion and improve safety for merging traffic.

Stage One included the successful upgrade of the Ellerslie Train Station and relocation of the Main Highway overbridge piers.

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Hill Street intersection..

Updated: 24 November 2014

The NZ Transport Agency and Auckland Transport are working together to improve safety and traffic flow along State Highway 1 in Warkworth.

Currently, improvements are focused on the Hudson Road and Hill Street/SH1 intersections.

During 2013, the Hudson Road/SH1 intersection works are expected to commence.

For more information, please see the project’s latest media release (25 January 2013).

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An example of a busy intersection with a local road on SH2..

Updated: 24 November 2014

The SH2 Northern Corridor Safe System project is looking to design and implement safety improvements along the corridor to create a more forgiving road environment.

As part of the investigation phase for this project the Transport Agency would like your feedback to identify what is important to the community who live, work and travel along SH2 between Bethlehem and Waihi.

Complete our online survey here

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Harris Road looking east..

Updated: 17 November 2014

The NZ Transport Agency and its council partners are investigating ways to make State Highway 58 safer for everyone who uses it... more

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SH3/SH37 Waitomo Intersection.

Updated: 13 November 2014

Work on a roundabout to improve safety in the Waitomo district will start in January 2015. The intersection of SH3/37 – the turnoff to the Waitomo Caves – will be replaced with a three-legged roundabout, relocated about 60 metres north of the existing intersection.

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Clearwater roundabout.

Updated: 11 November 2014

Johns Road (SH1) between The Groynes and Sawyers Arms Road is part of the Christchurch’s Western Corridor. Traffic volumes on the whole Western Corridor are increasing and this is expected to continue into the future. To improve travel times, efficiency and safety on this section of highway, it will be upgraded to a 4-lane, median separated highway.

Project update

Construction of this 2-2.5 year project will start on 15 September 2014 with a blessing and sod turning. The winners of the contract for this work – Downer with start work on site from this date on.

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  • Project type:
    • Roads of national significance
  • Project contact:
Upper Harbour Highway to Greville Road Northbound improvements.

Updated: 11 November 2014

The Upper Harbour Highway to Greville Road Northbound 3-laning is the first project to start construction as part of the Government's accelerated programme of works to improve transport infrastructure in Auckland. This project forms the first stage of the Northern Corridor accelerated package of works which focuses on improving links to and from the Northern Motorway.

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  • Project type:
    • Roads of national significance
  • Project contact:
Te Atatu Interchange.

Updated: 10 November 2014

The Te Atatu Interchange is one of five projects currently underway that completes the Western Ring Route - one of the Government's seven roads of national significance to help promote economic growth.

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Whirokino Trestle and Manawatu River.

Updated: 7 November 2014

The NZ Transport Agency is currently looking at all options for replacing the Whirokino Trestle, and either upgrading or replacing the Manawatu River Bridge... more

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SH16 St Lukes Road to Great North Road.

Updated: 5 November 2014

Set apart from the five other projects that make up the Western Ring Route, the SH16 St Lukes Road to Great North Road upgrade project is jointly funded by the NZ Transport Agency and Auckland Transport.

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