How we’re building it

TRAFFIC UPDATES: Roads across the north island have been impacted by recent weather events. We’ll provide updates on our Journey Planner website as information becomes available. View our traffic map for road closures and delays(external link)

Key facts

The extraordinary effort taken to build this unique road includes the following key facts.

Construction timeline

Preconstruction history and a timeline of the construction milestones over the years.

Design

Design and construction of the new motorway includes establishing sites, bulk earthworks and drainage, structures, pavement and commissioning.

Innovation

The Transmission Gully project is leading the way in the use of innovative technology from protecting workers to launching a bridge over a gully.

Te Ara a Toa (Bridge 20)

Te Ara a Toa (Bridge 20) is one of the project’s most significant structures. Learn more about how it was constructed and ‘launched’ over Cannons Creek.