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SH1/29 Piarere roundabout location confirmed


Waka Kotahi NZ Transport Agency has announced the preferred site for the roundabout to replace the dangerous intersection of State Highway 1 and State Highway 29 at Piarere. The location will be to the north-west of the existing intersection (see map below).

Funded by the NZ Upgrade Programme, this location is part of an important transport corridor between Auckland, Hamilton and Tauranga. The upgrade programme is delivering transport improvements that help people get where they’re going safety and provide more travel choices.

NZ Upgrade Programme – SH1/SH29 intersection
SH1/SH29 intersection project page

Waka Kotahi Regional Manager Infrastructure Delivery Jo Wilton says the roundabout will improve safety on a high-volume traffic route.

“This intersection is among the most dangerous on the New Zealand roading network. The new roundabout will ensure that all traffic has a safe and efficient way of making any type of movement, be it straight ahead or turning. Vehicle speeds in roundabouts is significantly lower, which minimises the impact of any crash that might still occur.”

The preferred site considers a number of factors, including initial technical assessments of stormwater, ecology, archaeology and geotechnical information.

Discussions with affected landowners are continuing, as is the finalisation of the detailed technical assessments required to complete design, the lodgement of the Notice of Requirement and regional consents. 

Lodgement of designation and consents for the SH1/29 roundabout is expected to happen later this year, with construction expected to start in 2022, subject to negotiations on property acquisition and RMA proceedings. 

Once started, construction is anticipated to take approximately two years to complete. Replacing the current intersection directly with the roundabout is not practical due to the high traffic volumes, safety considerations and the resulting disruption on SH1.

The Government recently confirmed the direction and funding commitment for these safety improvements at Piarere, through the NZ Upgrade Programme.

When the NZ Upgrade Programme was initiated, a number of the projects, including the SH1/29 roundabout, were in their early stages of development, with detailed project information still being established. Since then, Waka Kotahi has worked to get a better understanding of project risks, scope, costs and timeframes. For the SH1/29 roundabout, this work resulted in an updated cost estimate of $40m to deliver the project. The same scope and transport benefits will be delivered.

The detailed business case for the longer-term Cambridge to Piarere corridor (Waikato Expressway extension) was recently presented to the Waka Kotahi Board and their decision will be available soon, at which time the DBC will be published on the Waka Kotahi website.

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