Waka Kotahi, the New Zealand Transport Agency announced on Tuesday 29 July 2014 the signing of a Private-Public Partnership (PPP) contract between the NZ Transport Agency and the Wellington Gateway Partnership for the 27km Transmission Gully project.
The 27 kilometre four-lane motorway will run from Mackays Crossing to Linden, through Transmission Gully. Four interchanges and two new link roads will connect the route to Mackays, SH58, eastern Porirua and Kenepuru. The Transmission Gully motorway opened for traffic on 30 March 2022.
More information about the project is available on the Waka Kotahi NZTA website.