| Johnsonville–Porirua Motorway | |
|---|---|
| State Highway 1 | |
| Route information | |
| Maintained by New Zealand Transport Agency | |
| Length: | 11 km (7 mi) |
| Existed: | 1950 – present |
| Major junctions | |
| North end: | Porirua |
| South end: | Johnsonville |
| Location | |
| Primary destinations: |
Tawa, Churton Park, Grenada North |
| Highway system | |
|
New Zealand State Highways |
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The Johnsonville–Porirua Motorway is a motorway in Wellington, New Zealand. It forms part of State Highway 1, the main route of traffic in and out of the city.
The motorway runs from Johnsonville, in the north of Wellington City proper, to Porirua. It is approximately 11 kilometres long, and mostly flat. At its southern end, it is connected to the Wellington Urban Motorway through Ngauranga Gorge — this connection is not considered motorway, meeting most but not all of the criteria. If the Transmission Gully Motorway is built, it would connect to the Johnsonville–Porirua Motorway near its northern end.
The first section of the motorway, running for three miles (5 km) from Johnsonville to Takapau Road at the southern edge of Tawa, was opened on Saturday 23 December 1950 .[1][2] It bypassed a winding two-lane road now called Middleton Road, through Glenside. It was New Zealand's first motorway.[3]
| Territorial authority | Location | Destinations | Notes |
|---|---|---|---|
| Terminates onto State Highway 1 at Mungavin Ave - Titahi Bay Road interchange | |||
| Porirua City | Porirua CBD | Porirua City Centre, Eastern Porirua, Titahi Bay, Kenepuru | |
| Wellington City | Redwood | Tawa, Grenada North | |
| Glenside | Churton Park | ||
| North of Johnsonville | Johnsonville, Khandallah | southbound exit only | |
| South of Johnsonville | Johnsonville, Khandallah | northbound exit only | |
| Top of Ngauranga Gorge | Newlands, Woodridge, Grenada Village | ||
| Terminates onto Centennial Highway at the top of the Ngauranga Gorge | |||
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