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 | File:State Highway 1 NZ.svg SH 1 (Auckland Northern Motorway) at North Shore | |||
| South-west end | File:State Highway 16 NZ.svg SH 16 south (Northwestern Motorway) at West Harbour | |||
| Location | ||||
| Country | New Zealand | |||
| Primary destinations | Greenhithe, Hobsonville | |||
| Highway system | ||||
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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
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
| Territorial authority | Location | km | mi | Exit | Destinations | Notes |
|---|---|---|---|---|---|---|
| Auckland – Upper Harbour Local Board | Unsworth Heights | 0.0 | 0.0 | File:State Highway 1 NZ.svg SH 1 south (Northern Motorway) – Auckland | SH 18 and Upper Harbour Motorway begins | |
| File:State Highway 1 NZ.svg SH 1 north (Northern Motorway) – Whangarei | ||||||
| 0.5 | 0.31 | 1 | Caribbean Drive Paul Matthews Road | Eastbound exit and westbound entrance | ||
| 2.4 | 1.5 | 2 | File:NZL Urban Route 26.svg Route 26 (Albany Highway) | |||
| 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 File:State Highway 16 NZ.svg SH 16 north | ||
| 12.7 | 7.9 | 10 | Trig Road | Westbound exit and eastbound entrance | ||
| Auckland – Henderson-Massey Local Board | Westgate | 13.9 | 8.6 | 11 | File:NZL Urban Route 32.svg Route 32 (Hobsonville Road) | Westbound exit and eastbound entrance |
| 14.0 | 8.7 | File:State Highway 16 NZ.svg SH 16 south (Northwestern Motorway) – Waitakere, Auckland | SH 18 and Upper Harbour Motorway ends | |||
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi | ||||||
Former route
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
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
References
- ↑ 1.0 1.1 "Pedestrians to hit new motorway". Auckland Now. 3 August 2011. Retrieved 27 September 2011.