- New Zealand State Highway 18
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State Highway 18
Route information Maintained by New Zealand Transport Agency Length: 14 km (9 mi) Major junctions From: SH 1 Northern Motorway, Meadowood, North Shore City To: SH 16 Northwest Motorway, West Harbour, Waitakere City Location Primary
destinations:Greenhithe, Hobsonville Highway system New Zealand State Highways
Motorways and Expressways • List • Unused← 
SH 17SH 20 
→
Early 2010. Existing State Highway 18 as a standard, mostly rural, highway.
The Hobsonville section of the Upper Harbour Motorway, looking west from the Trig Road InterchangeState Highway 18 (also known as the Upper Harbour Motorway) is a State Highway linking North Shore City and Waitakere City in Auckland, New Zealand. It is the northern part of the Western Ring Route. State Highway 18 formerly ran along the Coatesville Riverhead Highway, further north than its current position.
Contents
Route
State Highway 18 begins at the 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 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 # Destinations Notes Auckland - Upper Harbour Board 0.0 
SH 1 Northern Motorway (south) – AucklandSH 18 ends SH 1 Northern Motorway (north) – WhangareiCaribbean Drive Paul Matthews Drive Unsworth Drive Westbound exit only 2.4 2 Route 26 Albany Highway Motorway ends Greenhithe 4.3 4 Greenhithe Road Eastbound exit and westbound entrance 6.2 6 Tauhinu Road Westbound exit and eastbound entrance 7.4 Upper Harbour Bridge over Waitemata Harbour Hobsonville 8 Squadron Drive Westbound exit and eastbound entrance 9 Brigham Creek Road – Whenuapai, Helensville to 
north10 Trig Road Westbound exit and eastbound entrance Auckland – Henderson-Massey Board Westgate 11 Route 32 Hobsonville Road Westbound exit and eastbound entrance SH 16 Northwest Motorway (south) – Waitakere, AucklandSH 18 ends 1.000 mi = 1.609 km; 1.000 km = 0.621 mi
Concurrency terminus • Closed/Former • Incomplete access • UnopenedCycleway
The route of the new motorway from Upper Harbour Bridge to Westgate was originally to receive a cycleway as well, but only the land was set aside, and as of 2011 there is no timetable for the construction of the route.[1]
See also
References
- ^ a b "Pedestrians to hit new motorway". Auckland Now. 3 August 2011. http://www.stuff.co.nz/auckland/5378186/Pedestrians-to-hit-new-motorway. Retrieved 27 September 2011.
New Zealand highways New Zealand State Highway network · List of New Zealand State Highways National 
North Island SH 10 · SH 11 · SH 12 · SH 14 · SH 15A · SH 16 · SH 17 · SH 18 · SH 20 · SH 21 · SH 22 · SH 23 · SH 24 · SH 25 (incl. SH 25A) · SH 26 · SH 27 · SH 28 · SH 29 · SH 30 (incl. SH 30A) · SH 31 · SH 32 · SH 33 · SH 34 · SH 35 · SH 36 · SH 37 · SH 38 · SH 39 · SH 41 · SH 43 · SH 44 · SH 45 · SH 46 · SH 47 · SH 48 · SH 49 · SH 50 (incl. SH 50A) · SH 53 · SH 54 · SH 56 · SH 57 · SH 58South Island Touring Routes Twin Coast Discovery Highway · Thermal Explorer Highway · Pacific Coast Highway · Classic New Zealand Wine Trail · Alpine Pacific Triangle · Great Alpine Highway · Foothills Scenic Route · Southern Scenic RouteList of motorways and expressways in New Zealand Auckland Northern Motorway · Northwestern Motorway · Southern Motorway · Southwestern Motorway · Upper Harbour MotorwayWellington Rest of North Island South Island Past motorways/expressways Wanganui Metropolitan Motorway · Dunedin Northern MotorwayFuture motorways/expressways Penlink · Waterview Connection · Transmission Gully Motorway · Kapiti Expressway · Tauranga Eastern Motorway · Christchurch Southern MotorwayMajor infrastructure 
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