Southwest Motorway
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| Southwestern Motorway | |
| State Highway Number | State Highway 20 |
| Length | 16 km 10 miles |
| Direction | Southeast - Northwest |
| Start | Wiri |
| Primary destinations | Manukau, Auckland Airport |
| End | Hillsborough Road |
| Construction dates | 1977 - 2015 |
| State Highways joined | Exit 1 State Highway 1 (proposed) Exit 3 State Highway 20B Exit 9 State Highway 20A Exit ? SH 16 Northwest Motorway (proposed) |
The Southwestern Motorway, State Highway 20 (SH20), forms part of the major route from Auckland CBD to Auckland International Airport, New Zealand. The motorway is 13 km in length with 8 junctions.
SH20 stretches from the Auckland Southern Motorway in Manukau City to Hayr Road, Mt Roskill in Auckland City, and currently only the section between Puhinui Road in the southeast and Hillsborough Road in the northwest is of motorway standard. Currently the motorway is being extended from SH20 intersection with Queenstown Rd in Mt Roskill to Richardson Rd and is expected be complete mid 2009. The planned final terminus will be the Northwest Motorway to build in 2015.
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 southern terminus 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 southern terminus of the Southwestern Motorway, Auckland International Airport, and the SH20/SH20A motorway junction.
[edit] Exit List
| Territorial authority | Location | Exit | Destinations | Notes |
|---|---|---|---|---|
| From 2010, terminates onto SH 1 Southern Motorway at the Manukau CBD | ||||
| Manukau City | 1 | SH 1 Southern Motorway Auckland City |
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| 2 | Lambie Drive | |||
| Currently terminates onto Roscommon Road at the Puhinui Road interchange | ||||
| Manukau City | 3 | SH 20B Puhinui Road | ||
| 7 | Massey Road | |||
| 9 | SH 20A Airport |
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| 10 | Walmsley Road, Coronation Road | |||
| 12 | Mahunga Drive | Southbound exit and northbound entrance | ||
| Mangere Bridge | ||||
| Auckland City | 13 | Nielson Street | ||
| 15 | Queenstown Road | Northbound exit and southbound entrance | ||
| 16 | Hillsborough Road | |||
| Currently terminates at Hillsborough Road Interchange | ||||
| Auckland City | 18 | Dominion Road | From 2009 | |
| Sandringham Road | From 2009 | |||
| From 2009, terminates at Sandringham Road. | ||||
| Auckland City | Maioro Street | From 2015 | ||
| Northwest Motorway | From 2015 | |||
| From 2015, is to terminate at SH 16 Northwest Motorway at Waterview | ||||
[edit] See also
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