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The Kenepuru Interchange connects Porirua city centre and Tawa with the Transmission Gully motorway, via a new link road which crosses the existing SH1 and North Island Main Trunk railway line at Kenepuru.

Kenepuru Interchange artist impression

Artist’s impression of the completed Kenepuru Interchange.

How to use the Kenepuru Interchange

A new roundabout connects the link road with Kenepuru Drive. The Kenepuru Interchange has both north and southbound on-ramps to the new motorway. It also has a southbound off-ramp for motorists traveling from Kāpiti or the Hutt Valley (via SH58) to Porirua city.

Motorists travelling northbound from Wellington to Porirua City Centre or Plimmerton, should continue to use their usual route – such as the off-ramp at Mungavin Avenue.

Directional arrows on a map showing how to use the Kenepuru InterchangesView larger map [PDF, 437 KB]

Check out the animated video below to see the new Kenepuru Interchange in action.

Understanding the Interchange – spotlight on Kenepuru

As we move closer to opening the new motorway, and the interchanges start to take shape, we’ll take a closer look at each. A spotlight on Kenepuru is the first in a series of information articles to give road users details on how the interchanges will work.

Kenepuru Interchange

Finishing works have begun in the Kenepuru and Linden areas; one of the most complex sections of the Transmission Gully motorway project.

In this area the construction team has been challenged to build a new motorway around an older one while keeping State Highway 1 open to traffic. It’s also involved working very close to suburban streets and local businesses. The large northbound bridge to access the new motorway, Kenepuru link road bridge and new Collins Avenue overbridge are all on track and in the final stages of construction.

Preparatory works for the Kenepuru Drive roundabout are underway where we’re building up ground levels to meet up and tie into the local road. This work will start to interface with local road users later in the year, and will involve some temporary traffic management measures. When we are close to starting these works, we’ll update the community on the plans to keep local traffic moving as smoothly as possible. Pedestrians will be provided for as well. Works in the area will be ongoing until the end of the year, to keep us on schedule to open the new motorway in 2020.

Here’s how the different bridges and roundabouts work together to form the new Kenepuru Interchange.

Map view of the Kenepuru Interchange.

Northbound traffic on Kenepuru Drive (from Tawa and Linden)

Northbound traffic on Kenepuru Drive will have two choices when they reach the new Kenepuru Drive roundabout.

  1. Take the first exit to stay on Kenepuru Drive and travel directly to Porirua.
  2. Take the second exit to connect with Transmission Gully via either the northbound motorway on-ramp towards Kāpiti, Pauatahanui and Whitby or the southbound on-ramp towards Wellington.

Map view of the new northbound on-ramp from the Kenepuru link road.

Southbound traffic on Kenepuru Drive (from Porirua)

Southbound traffic on Kenepuru Drive will have two choices when they reach the new Kenepuru Drive roundabout.

  1. Take the first exit to connect with Transmission Gully to the north or south.
  2. Take the second exit to continue south on Kenepuru Drive towards Linden and Tawa.

Map view of the new Kenepuru Drive roundabout and link road to the Kenepuru Interchange.

Southbound traffic on Transmission Gully motorway (from the north including Kāpiti, Pauatahanui and Whitby)

Southbound traffic on Transmission Gully motorway can take the off-ramp to the Kenepuru Interchange to connect with Kenepuru Drive for Linden, Tawa or Porirua connections.

  1. Exit left off Transmission Gully motorway, take the second exit off the Kenepuru Interchange roundabout, head west to connect with the Kenepuru Drive roundabout.
  2. At the Kenepuru Drive roundabout take the first exit to connect with Linden and Tawa.
  3. At the Kenepuru Drive roundabout take the second exit to connect with Porirua.

Map view showing the off-ramp to the new Kenepuru Interchange and link road to Kenepuru Drive.