Route
SH20 stretches from the Auckland Southern Motorway / New Zealand State Highway 1 in Manukau City to Sandringham Road, Sandringham, in Auckland City. From south to north the motorway passes through, or adjacent to, the suburbs of Wiri, Mangere, Onehunga, Hillsborough and Mount Roskill.
- Airport connection
The Southwestern Motorway bypasses Auckland International Airport, with SH20A from the north and SH20B from the east both branching off the SH20 to the airport.
SH20B leaves SH20 at the Cavendish Dr/Puhinui Rd/Roscommon Rd Interchange of the Southwestern Motorway and travels west along Puhinui Road to the airport. SH20A leaves the Southwestern Motorway in Mangere and travels south along an additional stretch of motorway, commonly referred to as the "Airport Motorway". The motorway terminates at Kirkbride Road, and traffic continues on SH20A south to the airport.
SH20, SH20A, and SH20B form an almost triangular shape between the Puhinui Interchange of the Southwestern Motorway, Auckland International Airport, and the SH20/SH20A motorway junction.
The planned final terminus will be the Northwest Motorway / New Zealand State Highway 16 via the Waterview Connection scheduled to open in 2017.
Read more about this topic: New Zealand State Highway 20
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