New Zealand State Highway 18
Encyclopedia
New Zealand State Highway network
The New Zealand State Highway network is the major national highway network in New Zealand. Just under 100 roads in both the North and South Islands are State Highways...
linking North Shore City and Waitakere City in Auckland
Auckland
The Auckland metropolitan area , in the North Island of New Zealand, is the largest and most populous urban area in the country with residents, percent of the country's population. Auckland also has the largest Polynesian population of any city in the world...
, New Zealand
New Zealand
New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...
. It is the northern part of the Western Ring Route
Western Ring Route
The Western Ring Route is a motorway system being constructed in Auckland, New Zealand. It runs along three existing state highways: the Southwestern Motorway , the Northwestern Motorway and the Upper Harbour Highway . When finished it will surpass the Southern Motorway to become the longest...
. State Highway 18 formerly ran along the Coatesville Riverhead Highway, further north than its current position.
Route
State Highway 18 begins at the Northern MotorwayNorthern Motorway
Northern Motorway can refer to one of several urban motorways within New Zealand:*Auckland Northern Motorway*Christchurch Northern Motorway*Dunedin Northern Motorway...
, as a dual carriageway road, heading west on Upper Harbour Highway, after two kilometres becoming a motorway at the Albany Highway interchange. This four-lane section of motorway opened in December 2007, and bypassed the single carriageway Upper Harbour Drive. The motorway heads south-west, crossing the upper reaches of the Waitemata Harbour
Waitemata Harbour
The quite famous Waitemata Harbour is the main access by sea to Auckland, New Zealand. For this reason it is often referred to as Auckland Harbour, despite the fact that it is only one of two harbours surrounding the city, and is crossed by the Auckland Harbour Bridge. The Waitemata forms the north...
over the Upper Harbour Bridge
Upper Harbour Bridge
The Upper Harbour Bridge or Greenhithe Bridge is a motorway bridge , which spans over a reach of the Waitemata Harbour and connects Hobsonville and Greenhithe , New Zealand....
. At Squadron Drive, the highway extends onto a new section of motorway, which opened in August 2011, bypassing Hobsonville Road. This road cuts across in a southwestern direction across farmland to Westgate, where it turns southward and merges with the Northwestern Motorway (SH 16
New Zealand State Highway 16
State Highway 16 is a New Zealand state highway linking Auckland City with Wellsford, via Auckland's Northwestern Motorway, Helensville and Kaukapakapa...
) southbound.
Interchanges
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! Territorial authority
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Exit number
An exit number is a number assigned to a road junction, usually an exit from a freeway. It is usually marked on the same sign as the destinations of the exit, as well as a sign in the gore....
! Destinations
! Notes
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| rowspan=12 | Auckland
Auckland Council
The Auckland Council is the council for the Auckland Region in New Zealand. It began operating on 1 November 2010, combining the functions of the existing regional council and the region's seven previous city and district councils into one "super council" or "super city" governed by a mayor, 20...
- Upper Harbour Board
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SH 1 Northern MotorwayAuckland Northern Motorway
The Auckland Northern Motorway is a major motorway in the Auckland Region of New Zealand, linking central Auckland City and Puhoi in the Rodney District, via the Hibiscus Coast and North Shore...
(south) – Auckland
| SH 18 ends
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SH 1 Northern MotorwayAuckland Northern Motorway
The Auckland Northern Motorway is a major motorway in the Auckland Region of New Zealand, linking central Auckland City and Puhoi in the Rodney District, via the Hibiscus Coast and North Shore...
(north) – Whangarei
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| Caribbean Drive
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| Paul Matthews Drive
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| Unsworth Drive
| Westbound exit only
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| 2.4
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| Route 26 Albany Highway
| Motorway ends
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| rowspan=3| Greenhithe
| 4.3
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| Greenhithe Road
| Eastbound exit and westbound entrance
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| 6.2
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| Tauhinu Road
| Westbound exit and eastbound entrance
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| 7.4
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| Upper Harbour Bridge
Upper Harbour Bridge
The Upper Harbour Bridge or Greenhithe Bridge is a motorway bridge , which spans over a reach of the Waitemata Harbour and connects Hobsonville and Greenhithe , New Zealand....
over Waitemata Harbour
Waitemata Harbour
The quite famous Waitemata Harbour is the main access by sea to Auckland, New Zealand. For this reason it is often referred to as Auckland Harbour, despite the fact that it is only one of two harbours surrounding the city, and is crossed by the Auckland Harbour Bridge. The Waitemata forms the north...
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| rowspan=3| Hobsonville
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| 8
| Squadron Drive
| Westbound exit and eastbound entrance
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| 9
| Brigham Creek Road – Whenuapai, Helensville
| to
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| 10
| Trig Road
| Westbound exit and eastbound entrance
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| rowspan=2| Auckland – Henderson-Massey Board
| rowspan=2| Westgate
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| 11
| Route 32 Hobsonville Road
| Westbound exit and eastbound entrance
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SH 16New Zealand State Highway 16
State Highway 16 is a New Zealand state highway linking Auckland City with Wellsford, via Auckland's Northwestern Motorway, Helensville and Kaukapakapa...
Northwest Motorway
Northwest Motorway
The Northwestern Motorway , part of State Highway 16 , is the major western route and secondary northern route out of Auckland in New Zealand...
(south) – Waitakere, Auckland
| SH 18 ends