State Highway 18 (New Zealand)

(Redirected from New Zealand State Highway 18) Road in New Zealand

State Highway 18

Route information

Maintained by NZ Transport Agency

Length

14 km (8.7 mi)

Major junctions

North-east end

SH 1 (Auckland Northern Motorway) at North Shore

South-west end

SH 16 south (Northwestern Motorway) at West Harbour

Location

Country

New Zealand

Primary
destinations

Greenhithe, Hobsonville

Highway system

New Zealand state highways

←

SH 17

→

SH 19

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. 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		SH 1 south (Northern Motorway) – Auckland	SH 18 and Upper Harbour Motorway begins
					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	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 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	Route 32 (Hobsonville Road)	Westbound exit and eastbound entrance
Auckland – Henderson-Massey Local Board	Westgate	14.0	8.7		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 Incomplete access

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.

References

^ "Pedestrians to hit new motorway". Auckland Now. 3 August 2011. Retrieved 27 September 2011.

External links

New Zealand Transport Agency

v t e New Zealand state highways
List of New Zealand state highways List of motorways and expressways in New Zealand
National	SH 1 (incl. SH 1B, SH 1C) SH 2 SH 3 (incl. SH 3A) SH 4 SH 5 SH 6 (incl. SH 6A) SH 7 (incl. SH 7A) SH 8 (incl. SH 8A, SH 8B)
North Island	SH 10 SH 11 SH 12 SH 14 SH 15 SH 16 SH 18 SH 19 SH 20 (incl. SH 20A, SH 20B) SH 21 SH 22 SH 23 SH 24 SH 25 (incl. SH 25A) SH 26 SH 27 SH 28 SH 29 (incl. SH 29A) 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 SH 51 SH 53 SH 54 SH 56 SH 57 SH 58 SH 59
South Island	SH 60 SH 62 SH 63 SH 65 SH 67 (incl. SH 67A) SH 69 SH 71 SH 73 SH 74 (incl. SH 74A) SH 75 SH 76 SH 77 SH 78 SH 79 SH 80 SH 82 SH 83 SH 84 SH 85 SH 86 SH 87 SH 88 SH 90 SH 93 SH 94 SH 95 SH 96 SH 97 SH 98 SH 99
Former state highways	SH 1A SH 1F SH 2A SH 2B SH 15 SH 15A SH 17 SH 36 SH 40 SH 47A SH 49A SH 50A SH 52 SH 57A SH 61 SH 70 SH 72 SH 73A SH 89 SH 91 SH 92
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 Inland Scenic Route Central Otago Touring Route Southern Scenic Route

List of motorways and expressways in New Zealand

North Island

Auckland	Northern Motorway Northwestern Motorway Southern Motorway Southwestern Motorway Upper Harbour Motorway
Wellington	Johnsonville–Porirua Motorway Wellington Urban Motorway Hutt Expressway Kāpiti Expressway Transmission Gully Motorway
Rest of North Island	Waikato Expressway Takitimu Drive Tamatea Arikinui Drive Tauranga Eastern Link Hawke's Bay Expressway

South Island

Christchurch	Christchurch Northern Motorway Christchurch Southern Motorway Christchurch-Lyttelton Motorway Christchurch Western Corridor Western Belfast Bypass
Rest of South Island	Dunedin Southern Motorway

Past motorways/
expressways

Future motorways/
expressways

Major
infrastructure

v t e Streets, Roads, Motorways and Highways in Auckland
Auckland urban route network Motorways in Auckland
Auckland city centre streets	Anzac Avenue Customs Street Hobson Street Karangahape Road Khyber Pass Road Quay Street Queen Street Shortland Street The Strand Symonds Street Victoria Street Wellesley Street
Arterial roads	Dominion Road Great North Road Great South Road New North Road Tamaki Drive
Suburban and regional roads	Kiwi Esplanade Portage Road, Ōtāhuhu Scenic Drive
Motorways and State Highways	Northern Motorway Northwestern Motorway Southwestern Motorway Southern Motorway State Highway 16 State Highway 22 Twin Coast Discovery Highway Upper Harbour Motorway O Mahurangi Penlink

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