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Wellington is served to the north by State Highway 1 in the west and State Highway 2 in the east, meeting at the Ngauranga Interchange north of the city centre, where SH 1 runs through the city to the airport.
Road access into the capital is lower in grade that most other cities in New Zealand - between Wellington and the Kapiti Coast, SH 1 travels along the Centennial Highway, an narrow accident-prone section of road, and between Wellington and Wairarapa, SH 2 transverses the Rimutaka Ranges on a similar narrow accident-prone road.
Wellington has two short motorways, both part of SH 1: the Johnsonville-Porirua Motorway and the Wellington Urban Motorway, which in combination with a small non-motorway section in the Ngauranga Gorge, connect Porirua with Wellington City.
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