State Highway 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 2 runs north–south through eastern parts of the North Island of New Zealand from the outskirts of Auckland to Wellington. It runs through Tauranga, Gisborne, Napier, Hastings and Masterton. It is the second-longest highway in the North Island, after State Highway 1, which runs the length of both of the country's main islands.
State Highway 49 (SH 49) is a New Zealand state highway, linking SH 4 and SH 1, via the tourist town of Ohakune. It forms the southern part of the ring road surrounding Tongariro National Park and provides access to the southern side of Mount Ruapehu and the Turoa skifield. It roughly follows the North Island Main Trunk railway.
State Highway 38 is a road in the North Island of New Zealand that starts from SH 5 near Waiotapu, and ends at Wairoa, where it connects to SH 2. It is the shortest connection from the central North Island (Rotorua) to the East Coast (Gisborne), but it is not often used as such. Large parts of the road are narrow and winding, and about 74 kilometres (46 mi) of the road is unsealed. Travel on this highway takes roughly four hours.
State Highway 73 is a major east-west South Island state highway in New Zealand connecting Christchurch on the east coast with Cass/Hokitika via the Southern Alps. It is mostly two lane, with some single-lane bridges north of Springfield but is mostly dual carriageway in Christchurch. The fourth and fifth-highest points of New Zealand's state highway network are on this road at Porters Pass and Arthur's Pass respectively.
State Highway 74 is a state highway in New Zealand servicing the eastern suburbs of Christchurch. Mostly two-lane, it is composed of limited-access expressways, with part of the highway as the Christchurch-Lyttelton Motorway, and connects the city to its port town of Lyttelton.
State Highway 77 is a state highway in New Zealand going through the inland parts of Central and Mid Canterbury between the towns of Ashburton and Darfield via the Rakaia Gorge. It is wholly single carriageway with two one-lane bridges at the Rakaia and Selwyn Rivers. One set of traffic lights is found in Ashburton marking the southern terminus of the highway.
State Highway 57 (SH 57) is a New Zealand state highway, linking State Highway 1 north of Ohau to State Highway 3 east of Ashhurst, via Levin, Shannon, Massey University and the southern suburbs of Palmerston North. The highway connects State Highway 1 traffic coming north from Wellington to the city of Palmerston North, and further to the Manawatū Gorge, allowing passage to the eastern side of the North Island and to the twin cities of Napier and Hastings. The highway is classified by the NZTA as a national strategic road.
State Highway 86 (SH 86) is a New Zealand state highway connecting the city of Dunedin's airport to State Highway 1 and the city itself. It was gazetted in 2003. It is a two-lane single carriageway.
State Highway 40 was part of the New Zealand state highway network before it was revoked in 1991–92.
State Highway 37 (SH 37) is a New Zealand state highway in the Waikato/Waitomo region of the North Island. It exists as a small spur from SH 3 to the Waitomo Caves, one of New Zealand's best-known tourist attractions. It was gazetted as a new state highway designation in 1997.
State Highway 25 is a New Zealand state highway that runs eastwards across the Hauraki Plains then northwards up the western side of Coromandel Peninsula and down the eastern side to Waihi. The route is very scenic and provides access to idyllic beach holiday locations. It is a major road for holidaymakers and tourists, with the summer period around Christmas and New Year's Eve a particularly busy time. It is single carriageway for the entire route. The road is windy in many parts and prone to accidents. It is New Zealand's third longest two-digit state highway, after SH 35 and SH 94. It is part of the Pacific Coast Highway. There is one spur road, SH 25A, which cuts across the peninsula west to east, almost intersecting SH 25 at both ends.
State Highway 39 (SH 39) is a New Zealand state highway that forms a western bypass of the city of Hamilton. Gazetted in 1999, it is a generally quicker route to get between Auckland and New Plymouth as well as connecting to the Waitomo Caves, just south of the SH 39 southern terminus. The southernmost 14 km section has a concurrency with SH 31, as this highway has existed for much longer.
State Highway 47 (SH 47) is a New Zealand state highway in the central North Island. It provides a link from SH 4 at National Park to SH 41 at Tokaanu just west of Tūrangi.
State Highway 54 (SH 54) is a New Zealand state highway that runs across nearly all of the Manawatū District in the North Island. It runs from SH 1 at Vinegar Hill to SH 3 near Palmerston North. The highway connects the Manawatū District's chief town, Feilding, to the New Zealand state highway network and forms an alternative route to SH 1 and SH 3 between the North Island Volcanic Plateau and Palmerston North.
State Highway 24 (SH 24) is a New Zealand state highway in the Waikato region. The highway was gazetted in 1997 and forms a short cut between the Matamata-Piako District and SH 29 towards the Port of Tauranga.
State Highway 15 (SH 15) is a New Zealand state highway in the Northland region of the North Island. It is 126.5 km (78.6 mi) long and provides an alternative route to SH 1 between the Kaikohe and Whangārei areas; a spur also links SH 1 with the Marsden Point Oil Refinery and Northport.
State Highway 36 (SH 36) is a New Zealand state highway in the Bay of Plenty region in the North Island. It is one of two state highways that form a north–south connection between the cities of Tauranga and Rotorua, SH 36 being the most westerly of the two. It was identified as a quicker route to access the two cities and extensive work was done to upgrade the rural route to state highway quality.
State Highway 46 (SH 46) is a New Zealand state highway in the central North Island.
State Highway 51 is a New Zealand state highway that runs between Napier and Hastings via Clive. Known locally as the Coastal Route, it was the main route between the two cities prior to the completion of the Hawke's Bay Expressway.
SH 57 (Makerua Road) at Makerua 
