Johnsonville-Porirua Motorway (SH 1 / SH 59) Approximately in length, this is New Zealand's first motorway; the first section opening in 1950. The section of the motorway between the southern terminus at
Johnsonville and the interchange with the
Transmission Gully Motorway forms part of , with the small section north of this point forming part of .
Wellington Urban Motorway (SH 1) From Ngauranga to Te Aro,
Kāpiti Expressway (SH 1) The Kāpiti Expressway is a four-lane grade-separated expressway, stretching from
Mackays Crossing north of
Paekākāriki to just north of
Ōtaki on the Kapiti Coast. It carries traffic through
Raumati,
Paraparaumu,
Waikanae and Ōtaki. The section from Mackays Crossing to
Raumati South was completed in 2007 with the grade separation of the Mackays railway level crossing. Work on the Raumati to
Peka Peka section started in December 2013 and opened on 24 February 2017, with minor finishing works completed by July. Construction of the section from Peka Peka north to Ōtaki commenced in late 2017 and opened in December 2022.
Transmission Gully Motorway (SH 1) Officially opened on 30 March 2022, from
Mackays Crossing near
Paekākāriki to the Johnsonville-Porirua Motorway in
Linden, bypassing Centennial Highway.
Hutt Expressway (Hutt Road, Western Hutt Road, River Road) (SH 2) From the Wellington Urban Motorway at
Ngauranga through the Hutt Valley to the Fergusson Drive intersection at Maoribank in northern Upper Hutt. It has three names: Hutt Road from Ngauranga to Petone, Western Hutt Road from Petone to Silverstream, and River Road from Silverstream to Maoribank. . The section south of Melling is dual carriage and is fully grade separated. The section from Melling north to Silverstream is dual carriage with a mixture of at-grade and grade separated intersections. The section north of Silverstream is a
2+1 road with at grade intersections. == Canterbury ==