The Manukau Extension project (completed January 2011) forms a 4.5 kilometre section of motorway linking SH20 Puhinui Interchange through to SH1, and will form the southern section of the Western Ring Route, together with the SH20 Manukau Harbour Crossing project.
To provide a direct link from State Highway 1 for traffic heading to Auckland Airport and central and western suburbs. As part of the southern section of the Western Ring Route, it will increase capacity to help relieve congestion and support economic growth.
This project was completed in January 2011.
The motorway has replaced Wiri Station Road as the main link from Manukau city centre to the Southwestern Motorway. The 4.5 kilometre motorway forms the southern section of the Western Ring Route, along with the SH20 Manukau Harbour Crossing project. Construction began in June 2006.
Project features