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Project introduction

The NZ Transport Agency has been investigating long-term improvements in the safety of SH1 between Cambridge (where the Waikato Expressway ends) and Piarere (at the SH1 and SH29 intersection).

  • Estimated project cost

    $8.3 million
  • Project type

    Safety improvements
  • Project status


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Purpose of the project

To investigate long-term improvements in the safety of SH1 between Cambridge and Piarere.


The SH1 Cambridge to Piarere long-term project has been revised to prioritise safety and access on the existing state highway, and include a range of short, medium and long-term improvements. This follows a re-evaluation process completed in November 2018.

The Transport Agency plans to enhance safety improvements already under way, including investigating what we can do to improve the SH1/SH29 intersection. Along the route additional improvements will reduce the number of serious crashes and the impact of crashes if they do occur.

The long-term strategic route to extend the Waikato Expressway to Piarere will be confirmed through the completion of the business case, although no funding has been allocated for this.

The Transport Agency will continue to monitor the route to determine when construction of the new route is required.

Short-term safety improvements

With the completion of the Cambridge section of the Waikato Expressway and increasing volumes of traffic using this section of SH1, short-term safety improvements have been made to this part of SH1.

Safety improvements completed on this section include:

  • Trimming vegetation and moving fences to improve visibility at Ferguson Gully Road.
  • Installing new street lights at the Fergusson Gully Rd intersection.
  • New right-turn bay at Keeley Reserve.
  • Moving the Karapiro Road bus stop.
  • Moving the Karapiro School bus stop to a safer location.
  • Installing electronic warning signs at the SH1/SH29 intersection.

Safety improvements starting soon:

  • Cambridge to Piarere safety improvements 

NZ Upgrade programme - SH1/SH29 intersection