State Highway 1 (New Zealand)

State Highway 1 (SH 1) is the longest and most significant road in the New Zealand road network, running the length of both main islands. It appears on road maps as SH 1 and on road signs as a white number 1 on a red shield, but it has the official designations SH 1N in the North Island, SH 1S in the South Island.

State Highway 1
Route information
Maintained by NZ Transport Agency
Length2,033 km (1,263 mi)
Tourist
routes
Twin Coast Discovery Highway
Thermal Explorer Highway
Classic New Zealand Wine Trail
Alpine Pacific Triangle
Southern Scenic Route
North Island (SH 1N)
Length1,081 km (672 mi)
North endCape Reinga
Major
junctions
SH 2 south near Pōkeno
SH 3 south (Ohaupo Road) at Hamilton
SH 5 north at Wairakei
SH 5 south (Napier-Taupō Highway) at Taupō
SH 3 north (Bridge Street) at Bulls
SH 3 south (Dundas Street) at Sanson
SH 2 north (Hutt Road) at Ngauranga Interchange
South end Wellington International Airport
South Island (SH 1S)
Length952 km (592 mi)
North end Picton railway station
Major
junctions
SH 6 south (Nelson Street) at Blenheim
SH 7 (Waipara Flat Road) at Waipara
SH 8 south (Racecourse Road) at Washdyke
SH 8 north (Manuka Gorge Highway) at Clarksville
SH 6 north (Dee Street) at Invercargill
South endBluff (Stirling Point)
Location
Primary
destinations
Whangārei, North Shore, Auckland, Manukau, Hamilton, Taupō, Porirua, Wellington, Picton, Blenheim, Christchurch, Ashburton, Timaru, Oamaru, Dunedin, Gore, Invercargill
Highway system
SH 99 SH 2

SH 1 is 2,033 kilometres (1,263 mi) long, 1,081 km (672 mi) in the North Island and 952 km (592 mi) in the South Island. For the majority of its length it is a two-lane single carriageway, with at-grade intersections and property accesses, in both rural and urban areas. These sections have some passing lanes. Around 226 km (140 mi) of SH 1 is of motorway or expressway standard as of October 2017: 197 km (122 mi) in the North Island and 28 km (17 mi) in the South Island. Current road construction will see an extra 96 km (60 mi) in the North Island and 6 km (4 mi) in the South Island upgraded to motorway or expressway standard by 2022.