 It will eventually become part of State Highway 1 when it is scheduled to be completed in late 2020.The motorway was begun as part of the Wellington Northern Corridor portion of the former National Government's Roads of National Significance package of new state highways.It will not, however, offer any access to the gully itself, as no on- or off-ramps are planned to be constructed between Pauatahanui and MacKay's Crossing, north of Paekakariki.