State Highway 18 (New Zealand)
State Highway 18 | ||||
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Route information | ||||
Maintained by NZ Transport Agency | ||||
Length | 14 km (8.7 mi) | |||
Major junctions | ||||
North-east end | ![]() | |||
South-west end | ![]() | |||
Location | ||||
Country | New Zealand | |||
Primary destinations | Greenhithe, Hobsonville | |||
Highway system | ||||
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![](http://upload.wikimedia.org/wikipedia/commons/thumb/5/5e/Hobsonville%2C_Rural_Scenes_Giving_Way.jpg/220px-Hobsonville%2C_Rural_Scenes_Giving_Way.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a2/Upper_Harbour_Motorway_at_Trig_Road_Interchange.jpg/220px-Upper_Harbour_Motorway_at_Trig_Road_Interchange.jpg)
State Highway 18 (SH 18), also known as the Upper Harbour Motorway, is a state highway that runs between the Auckland Northern Motorway (SH 1) on the North Shore and the Northwestern Motorway (SH 16) in West Auckland, New Zealand. SH 18 forms the northern part of the Western Ring Route, which continues from Waitakere south-east to Manukau.
Route
[edit]SH 18 begins at the Auckland Northern Motorway and runs southwest as a dual carriageway road, and is coextensive with the Upper Harbour Highway, which after two kilometres becomes 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 Waitematā Harbour over the Upper Harbour Bridge. At Squadron Drive, the highway extends onto a new section of motorway, which opened in August 2011, bypassing Hobsonville Road.[1] This road cuts across in a southwestern direction across farmland to Westgate, where it turns southward and merges with the Northwestern Motorway (SH 16) southbound.
Interchanges
[edit]Territorial authority | Location | km | mi | Exit | Destinations | Notes |
---|---|---|---|---|---|---|
Auckland – Upper Harbour Local Board | Unsworth Heights | 0.0 | 0.0 | ![]() | SH 18 and Upper Harbour Motorway begins | |
![]() | ||||||
0.5 | 0.31 | 1 | Caribbean Drive Paul Matthews Road | Eastbound exit and westbound entrance | ||
2.4 | 1.5 | 2 | ![]() | |||
Greenhithe | 4.3 | 2.7 | 4 | Greenhithe Road | Westbound exit and eastbound entrance | |
6.2 | 3.9 | 6 | Tauhinu Road | Eastbound exit and Westbound entrance | ||
7.4 | 4.6 | Upper Harbour Bridge (Waitematā Harbour) | ||||
Hobsonville | 8.8 | 5.5 | 8 | Squadron Drive | Westbound exit and eastbound entrance | |
10.7 | 6.6 | 9 | Brigham Creek Road – Whenuapai, Wellsford | to ![]() | ||
12.7 | 7.9 | 10 | Trig Road | Westbound exit and eastbound entrance | ||
Auckland – Henderson-Massey Local Board | Westgate | 13.9 | 8.6 | 11 | ![]() | Westbound exit and eastbound entrance |
14.0 | 8.7 | ![]() | SH 18 and Upper Harbour Motorway ends | |||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi |
Former route
[edit]SH 18 formerly ran along the Coatesville Riverhead Highway, further north than its current position. This route is now designated as Auckland Urban Route 28.
Cycleway
[edit]The route of the new motorway from Upper Harbour Bridge to Westgate was originally to receive a cycleway as well, but although the land was set aside, there is no timetable for the construction of the route.[1]
See also
[edit]References
[edit]- ^ a b "Pedestrians to hit new motorway". Auckland Now. 3 August 2011. Retrieved 27 September 2011.