Ngauranga Interchange

Ngauranga Interchange
Location
Ngauranga, Wellington, New Zealand
Coordinates:	41°14′49″S 174°48′52″E / 41.247063°S 174.814517°E / -41.247063; 174.814517Coordinates: 41°14′49″S 174°48′52″E / 41.247063°S 174.814517°E / -41.247063; 174.814517
Roads at junction:	SH 1 (Centennial Highway) SH 1 (Wellington Urban Motorway) SH 2 (Hutt Road) Hutt Road
Construction
Type:	Modified semi-directional T interchange
Constructed:	1969, 1984
Opened:	1984 (1984)
Maintained by:	New Zealand Transport Agency

The Ngauranga Interchange is a major interchange in the suburb of Ngauranga, in Wellington City, New Zealand. The Ngauranga interchange connects State Highways 1 and 2 with each other and also to Hutt Road for access to the interisland ferry terminals and alternative access to Wellington City. The majority of traffic in and out of Wellington City uses this interchange.

It is the southern terminus of State Highway 2.

Design

The interchange connects State Highways 1 and 2 to the Wellington Urban Motorway.

Southbound traffic on SH1 may continue onto the Wellington Urban Motorway or exit before the interchange and proceed through the adjacent intersection to Hutt Road or to SH2.

Southbound traffic on SH2 may continue onto the Wellington Urban Motorway or exit before the interchange and proceed through the intersection to Hutt Road or to SH1.

Northbound Wellington Urban Motorway traffic may proceed straight ahead for SH2 or veer left for SH1 at the interchange.

Similarly northbound Hutt Road traffic may proceed straight ahead for SH2 or veer left for SH1 at the intersection.

Hutt Road and the Wellington Urban Motorway run parallel to each other from Wellington to Ngauranga.

History

Before the construction of the Wellington Urban Motorway, the interchange comprised a single set of traffic lights between Hutt Road (SH2) and Centennial Drive (SH1).

On opening of the Wellington Urban Motorway in 1969, the interchange was modified to a fork. Traffic from SH2 could exit for Hutt Road and SH1, or could proceed straight for the motorway. At the traffic lights, vehicles from SH1 could turn right for Hutt Road and Wellington, or turn left for the SH2 towards the Hutt Valley. SH1 traffic could not access the motorway.

The opening of two ramps in 1984 allowed traffic from SH1 to access the motorway directly. This is how the junction remains today.

List of motorways and expressways in New Zealand

Auckland	Northern Motorway Northwestern Motorway Southern Motorway Southwestern Motorway Upper Harbour Motorway

Wellington	Johnsonville–Porirua Motorway Wellington Urban Motorway Hutt Expressway

Rest of North Island	Waikato Expressway Takitimu Drive Tauranga Eastern Link Hawke's Bay Expressway

South Island	Christchurch Northern Motorway Christchurch Southern Motorway Christchurch-Lyttelton Motorway Dunedin Southern Motorway

Past motorways/expressways	New Plymouth Southern Motorway Wanganui Metropolitan Motorway Dunedin Northern Motorway

Future motorways/expressways	Puhoi to Wellsford Motorway Penlink Second Harbour Crossing Waterview Connection Transmission Gully Motorway Kapiti Expressway Western Belfast Bypass

Major infrastructure	Upper Harbour Bridge Northern Busway, Auckland Auckland Harbour Bridge Victoria Park Tunnel and Viaduct Central Motorway Junction Newmarket Viaduct Mangere Bridge Tauranga Harbour Bridge Ngauranga Interchange Terrace Motorway Tunnel Lyttelton Road Tunnel

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