Northwestern Motorway

State Highway 16 shield}}
Northwestern Motorway
Map
Northwestern Motorway West Avondale.jpg
The motorway west of Waterview
Route information
Maintained by NZ Transport Agency
Length21 km (13 mi)
Existed1952–present
Component
highways
State Highway 16
Major junctions
East end SH 16 (Stanley Street) – Auckland CBD
Major intersections SH 1 (Northern Motorway/Southern Motorway) – Auckland CBD
West endBrigham Creek Road, Whenuapai
Location
CountryNew Zealand
Primary
destinations
Central Auckland, West Auckland
Highway system

The Northwestern Motorway (also known historically as the Auckland–Kumeu Motorway), part of State Highway 16 (SH 16), is the major western route and secondary northern route out of Auckland in New Zealand. Twenty-one kilometres in length, the motorway runs from Stanley St in Parnell through the Central Motorway Junction, and west through Central Auckland and West Auckland before continuing northwest and terminating outside of Kumeū. Its western terminus is at Brigham Creek Road in Whenuapai. A large part of it forms the middle section of the Western Ring Route.