State Highway 1 - Wellington Improvements Project

The State Highway 1 - Wellington Improvements Project involves delivering upgrades to State Highway 1 through central Wellington, including duplication of the Terrace Tunnel and Mount Victoria Tunnel, and various road works through Te Aro, the Basin Reserve, and between Ruahine Street and Cobham Drive. The project is being delivered across two stages.

Stage One - Tunnels, which includes

• delivery of a second Terrace Tunnel with two southbound lanes, reconfiguration of the existing Terrace Tunnel with two northbound lanes, and upgrades to the northern and southern approaches, and
• delivery of a second Mt Victoria Tunnel with two eastbound lanes, a 3.6-metre-wide walking and cycling shared path and retrofitting the existing Tunnel to two westbound lanes. 

Stage Two - Roads, which includes

• the Te Aro improvements, including three lanes on Vivian Street and three through-lanes on Karo Drive at Willis Street intersection
• Basin Reserve upgrades, including grade separating state highway traffic and local traffic, public transport and active transport connections, and a new green link from Pukeahu National War Memorial Park to Cambridge Terrace, and
• the Ruahine Street and Wellington Road upgrades, involving widening to two lanes in each direction, a new Hataitai Park Bridge over State Highway 1, and replacement of the existing Hataitai Park footbridge.