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Project introduction

State Highway 58 runs between State Highway 2 and Paremata. This Crown-funded project is a Road of Regional Significance that aims to improve safety and reliability of the section of road, between SH2 and Transmission Gully.

  • Estimated project cost

    Stage 1 is complete. Approximately $112m for Stage 2.
  • Project type

    Safety improvements
  • Project status

    Construction

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Overview

State Highway 58 is a regional route providing critical east-west access from State Highway 2 to State Highway 1 and is key to the region’s state highway network. Over 19,000 vehicles travel on this highway daily. It is narrow and windy with many unprotected roadside hazards.

Construction of physical safety improvements has been progressing in stages, from east to west.

Safety improvements between State Highway 2 and Moonshine Road are complete.

Work on the final stage of the project between Moonshine and Flightys/Murphys Road is scheduled to begin in mid-June 2025. Improvements in this area include:

  • two new roundabouts, at the Moonshine Road and the Flightys/Murphys Roads intersections
  • shared paths around the roundabouts
  • new culverts to manage water flows
  • localised widening of the road and side barriers
  • installation of median barriers.

Planning for work between Flightys/Murphys roads and Transmission Gully is underway and will continue to happen alongside the work we’re doing now. Details for this area will be confirmed at a later date.

  • Background

    The 5-year crash history for SH58 includes 10 serious or fatal crashes. These incidents also cause travel time reliability problems from crash related delays and closures of the road.

    Consultation with the community and other stakeholders has led to the development of the work that is currently underway.

    In 2018, the speed limit was changed from 100km/h to 80km/h. We also addressed some of the high-risk curves west of Mt Cecil Rd, by straightening them and installing a median barrier.

    In February 2025, a decision was made by the NZTA Board to complete the final stage of the State Highway 58 (SH58) safety improvements project, between Moonshine Road and SH1/Transmission Gully.

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  • New roundabout layouts

    Flightys and Murphys Road roundabout

    At Flightys/Murphys roads there is currently a bus stop on each side of SH58. The new design has a dedicated bus pull-in bay off the road, alongside the new roundabout. This allows for up to three buses to park and transfer students between buses. The area, separated from the main road, means multiple children can transfer safely. Currently these transfers occur at the large bus stop area at Moonshine Road. Within the bus pull-in bay, there is space for up to nine to 10 cars to park/drop off and collect students. New bus shelters will also be installed.

    At Moonshine Road, the bus stops are currently all on the northern side of SH58. The new design has bus stops with bus shelters on both sides of SH58 on the approaches to the roundabout. There is also room for 3 to 4 cars to be parked on the eastern side of Moonshine Road. We are investigating an additional facility on the western side of Moonshine Road.

    Indicative visualisation of the Moonshine Road roundabout

    At both roundabouts there will be improved lighting, clear signage, and pedestrian refuges in the central medians to improve the safety of people crossing the road at these locations. There will be shared paths around the roundabouts and extending short distances along SH58 in  each direction. These paths provide an alternative off-road option for cyclists through the roundabouts, as well as a path for people walking to access the bus stops. Median barriers will be installed.

    Alternative turn arounds

    Road safety barriers give you a second chance, so a simple mistake on the road doesn’t cost a life. Barriers stop your vehicle before it hits something harder – like a tree, a power pole or an oncoming vehicle.

    Installing a median safety barrier means that some right turns will be removed and some of the roads that connect to SH58 will become left-in/left-out only.

    While some people living and working along SH58 will have very little change to their access, others will have a few minutes added to their journeys.

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  • Phases for highway improvements

    Phases

    Indicative date

    Detailed design, lodge consent applications

    2017–2021

    SH2, Haywards Interchange through to Mount Cecil Road, construction

    2019–2021

    Mount Cecil Road to Harris Road construction

    2021–2023

    Harris Road to east of Moonshine Road construction

    2023–2024

    Moonshine Road to SH1 Transmission Gully interchange construction

    2025–2027

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