First section completed in 1955. Route completed in 2017.
Major junctions
North end
SH 1 near Rosedale
Major intersections
SH 16 at Westgate SH 16 at Waterview SH 20A at Mangere SH 20B at Puhinui
South end
SH 20 at Manukau
Location
Country
New Zealand
Major cities
Greenhithe, Hobsonville, Massey, Te Atatu, Waterview, Mount Roskill, Onehunga, Mangere, Auckland Airport, Wiri
Highway system
New Zealand state highways
Motorways and expressways
List
The Western Ring Route is a motorway system being constructed in Auckland, New Zealand. It currently runs along (from south to north) the entire Southwestern Motorway (State Highway 20), most of the Northwestern Motorway (part of SH 16), the entire Upper Harbour Motorway, and the entire Upper Harbour Highway (the last two forming SH 18).[1] When the Upper Harbour Highway is upgraded to motorway status, the route will surpass the Southern Motorway to become the longest motorway in New Zealand at 48 kilometres in length. It runs through Manukau, West Auckland, and the North Shore, bypassing the Auckland city centre and thus providing a second motorway route through the Auckland isthmus.[1]
^ ab"Western Ring Route". NZ Transport Agency.
and 22 Related for: Western Ring Route information
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Global Information
SH 1 near Rosedale
SH 16 at Westgate 
SH 20A at Mangere 
SH 20B at Puhinui
SH 20 at Manukau