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Government Updates Ministry of Health Porirua City Council facilities & services Covid-19 welfare information

Ambulance Drive Roundabout

When Transmission Gully opens, the traffic along Kenepuru Drive between the Transmission Gully link road roundabout and Raiha Street is expected to increase by up to 50% during peak times. This roundabout will create a safer turning and crossing point for motorists, pedestrians and cyclists.

There is already an issue for motorists trying to turn right out of the businesses along Kenepuru Drive.

When Transmission Gully opens motorists will experience even more difficulty safely turning right in and out of businesses during busy periods, and it will become harder for pedestrians and cyclists wanting to cross Kenepuru Drive to visit businesses or access Kenepuru Station or the Hospital via Ambulance Drive.

With this in mind, we’re talking to local businesses and organisations about plans to construct a roundabout in the second half of 2021 at the Ambulance Drive/Kenepuru Drive intersection.

As Porirua City continues to grow, we’re committed to ensuring safe access to all businesses and road users using the Kenepuru Corridor for now and in the future.

Construction update 9 September 2021

Construction work on Ambulance Drive started again last week, after a brief pause during the Covid-19 Alert Level 4 lockdown. Our contractors (Downer) are on site operating under the government’s protocols for the relevant alert levels.

Work completed so far includes:

  • Widening the temporary pavement which included removal of existing kerb and channel to push all northbound traffic around the new roundabout location
  • Excavation of the existing pavement to prepare for the installation of the new roundabout

Work in the next fortnight

Work planned for the next couple of weeks (subject to weather and Covid 19 alert level changes) includes:

  • Installing the new roundabout (including concrete works)
  • Realignment of the kerb and channel on the eastern side while the concrete roundabout is curing; the temporary pavement will remain in place while this happens


The programme is currently being revised to take into account the impact of the Covid-19 lockdown and associated supply chain procurement lead times and delays. We will keep you posted on this page.

Benefits of the roundabout

The roundabout at Ambulance Drive, along with other changes being made along Kenepuru Drive, will help break up traffic flows. This will enable us to improve the crossing points and make it easier for vehicles exiting businesses along Kenepuru Drive between the new Transmission Gully link road and Ambulance Drive.

In a nutshell this means:

  • Vehicles coming out of businesses on the Porirua Stream side of Kenepuru Drive, who wish to travel north, will have the option to turn left and undertake a u-turn at the Ambulance Drive roundabout before travelling north. Please note this roundabout will not be suitable for large tracks, that wish to travel north. Those vehicles will need to use the Kenepuru Drive / Raiha St roundabout, as the Ambulance Drive roundabout is not being designed to cater for them due to available space and safety considerations.
  • The reduced speed created by the roundabout means we can upgrade the pedestrian and cycling crossing points which will improve the connection to and from the Kenepuru Railway station. This will include installing a zebra crossing and/or a raised pedestrian safety platform.

Revised design June 2021

Below is the revised design for the roundabout. This has been updated from the first concept developed in December 2020. The revised design takes into account feedback from local businesses, stakeholder groups and an independent road safety audit.

21.06.24 Ambulance Updated design CROPPED.jpg

If you’re interested in how the concept has evolved, you can view the first concept from 2020 here

Monitoring the changes

Once the roundabout has been installed, we will continue monitoring along Kenepuru Drive to look at speeds, volumes and delays. We will share these results and any further improvements planned as a result of the monitoring with stakeholders.

Next Steps

  • March 2021: Design work commenced
  • June 2021: Revised design completed
  • August 2021: Construction started (completion to align with opening of Transmission Gully)


The programme for Ambulance Drive, including completion dates, is currently being revised to take into account the impact of the Covid-19 lockdown and associated supply chain procurement lead times and delays. The roundabout is planned to be operational when Transmission Gully opens in 2021.

Get in touch

For any queries related to the work, please contact Downer on 04 562 6566. If you have any other questions, you can call our contact centre on (04) 237 5089 or drop us a line on