72-394: [REDACTED] SH 1 ( Southern Motorway ) The Central Motorway Junction or CMJ (best known as Spaghetti Junction and rarely as Central Motorway Intersection or CMI ), is the intersection of State Highways 1 and 16 , just south of the central business district of Auckland . A multilevel structure (three traffic levels crossing in several locations), it has been described as
144-453: A motorway ) to the northern outskirts of Dunedin . From here it descends a steep, twisting stretch of Pine Hill Road through Pine Hill , before passing the University of Otago and heading through the city centre. For much of its route through Central Dunedin the highway is split into two separate northbound and southbound roads, part of the city's one-way street system. These roads traverse
216-642: A "fiendishly complicated, multi-layered puzzle of concrete, steel and asphalt". Carrying around 200,000 vehicles a day, it is one of the busiest stretches of road in New Zealand. The central motorway junction forms the intersection between three major motorways: the Northern Motorway (SH1), the Southern Motorway (SH1), and the Northwestern Motorway (SH16), and has several off-ramps for access to
288-500: A blog post in which he proposed to link the off-ramp to the road network south of the city centre via a ramp built from scaffolding with Karangahape Road . In a follow-up meeting with Transport Agency staff, the idea found their support. When the National government announced a NZ$ 100 million package for cycling infrastructure in August 2014 during the campaign for the 2014 election ,
360-739: A broadly southeast direction across the Auckland isthmus , then through Manukau and Papakura to the top of the Bombay Hills , just short of the Auckland/ Waikato boundary. At Bombay, SH 1 becomes the Waikato Expressway , a four-lane dual-carriageway expressway. The expressway takes the highway down the Bombay Hills to Mercer, where SH 1 meets the Waikato River , which it broadly follows for
432-484: A bypass, sometimes the former route is designated a spur until such time as the road can be transferred to the local council. All these routes are unsigned and appear as local arterial roads on maps. State Highway 1 has been earmarked for several motorway projects most of which have surfaced from the National government's Roads of National Significance package announced in 2009. The section of Marsden Point to Whangārei
504-531: A connection from the CMJ to Auckland's Nelson Street was closed and replaced with an upgraded ramp. The old Nelson Street off-ramp was difficult to reach for drivers coming from the Auckland Southern Motorway , as they had to weave to the right within the CMJ. The new Nelson Street off-ramp was opened on 3 July 2005 and allowed for the principle of keeping left when leaving the motorway. The concept of using
576-534: A cutting through the Karangahape ridge on a multi-level structure. The other two major motorways in Auckland, the 'South-Western' and 'Upper Harbour' motorways, form a continuous link in the west of the city, providing an alternative to SH1 between Manukau and Albany . The goal is to provide traffic passing through Auckland, or starting or ending in the western suburbs, with an alternative high-speed route that bypasses
648-602: A major freight route. With the detour bridges reaching the end of their lifespan, NZTA replaced the fords with culverts . Construction of motorways and expressways has diverted the route of State Highway 1 in many places. The opening of the Auckland Harbour Bridge and the Auckland Northern Motorway between Northcote Road and Fanshawe Street in May 1959 saw State Highway 1 diverted from its former route around
720-740: A roundabout at the entrance to the airport. The South Island section of SH 1 starts in Picton , adjacent to the railway station. Leaving Picton, SH 1 rises steeply to cross the Elevation saddle into the valley of the Tuamarina River . It descends alongside this river and across the Wairau Plain before reaching Blenheim . SH 1 passes through Weld Pass and Dashwood Pass to enter the Awatere Valley , then countiuses southward before passing Lake Grassmere . From
792-408: A short section down Market Place until Pakenham Street East intersection. The final stage is a bi-directional cycleway on Market Place, Customs Street West and then the western side of Lower Hobson Street ; completing the city centre loop. Consultations were held in late 2017. This became part of Project WAVE (Westhaven And Viaduct Enhancements). A trial layout was installed in 2021, which led to
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#1732851451807864-638: Is a cycleway (and in some sections, a shared pathway for walking and cycling) in Auckland , New Zealand. The most well-known section of the path is Te Ara I Whiti , translated as, and commonly known as Lightpath (also known as the Pink Path ). The cycleway then continues on to the Nelson Street arterial road into the City Centre. Unique features of the old offramp are the hot-pink colour of its surface, and its LED mood lighting system that constantly changes;
936-582: Is of motorway or expressway standard as of August 2022 : 281 km (175 mi) in the North Island and 34 km (21 mi) in the South Island. SH 1 starts at Cape Reinga , at the northwestern tip of the Aupōuri Peninsula , and since April 2010 has been sealed (mainly with either chipseal or asphalt ) for its entire length. From Waitiki Landing south of Cape Reinga, SH 1 travels down
1008-585: Is the section that is called Lightpath – plus the first three street blocks of Nelson Street up to Victoria Street West . The chosen route starts at Upper Queen Street, linking there with the Northwestern Cycleway that has been extended to descend into Grafton Gully via the Symonds Street Cemetery . Turning off Upper Queen Street into Canada Street, a new bridge connects to the old Nelson Street off-ramp. The motorway infrastructure links into
1080-571: Is to be upgraded to four lanes as part of the New Zealand Upgrade Programme . The Puhoi to Wellsford motorway (Ara Tūhono) is one of the projects of the Roads of National Significance . This planned new road is also referred to as the "Holiday Highway" as the current SH 1 becomes heavily congested in holiday periods from holidaymakers travelling to and from Auckland in the summer holiday season and public holiday weekends. Construction of
1152-474: The 2016 Kaikōura earthquake . SH 1 passes through Amberley and Woodend before becoming the Christchurch Northern Motorway and bypassing Kaiapoi to the west. At The Groynes west of Belfast , the motorway narrows to a four-lane divided arterial. SH 1 continues around the north-western urban fringe of Christchurch , passing just east of Christchurch International Airport . At Hornby ,
1224-415: The Auckland waterfront to the north forming the fourth 'border' of central Auckland. Designed in the 1960s and with most of its links built in the 1970s, the CMJ was a major project in a scheme that led to the forcible acquisition and demolition of 15,000 dwellings in the inner suburbs, causing 50,000 people to move away from the area, with major negative effects on the nearby Auckland CBD , and especially
1296-666: The Karangahape Road shopping area, which fell into decline for decades. Two Catholic schools, St Benedict's College (secondary) and St Benedict's School (primary) , were forced to close down. The CMJ was substantially extended (or in a sense, finally completed) in the 2000s, with the final links opened to traffic in December 2006. During the duration of this NZ$ 208m project, the existing motorways had to be closed several hundred times during overnight, with traffic rerouted over local roads. The CMJ provides motorway-to-motorway links between
1368-535: The Lake Taupō shoreline south of the town near the airport . SH 1 follows the eastern shore of the lake for 50 km (31 mi) to Tūrangi , at the southern end of the lake. Via SH32/41 the distance is about 6 km (3.7 mi) shorter than this section of SH1. Turning southwards again, SH 1 leaves Tūrangi and ascends onto the North Island Volcanic Plateau , passing through the fringes of
1440-630: The Rangitikei River through Taihape to meet the main river at Utiku. It then follows the western bank of the Rangitikei through Ohingaiti and Hunterville to Bulls . At Bulls, SH 1 turns southeast to cross the river, turning southwest again 5 km (3.1 mi) down the road at Sanson . SH 1 crosses the Manawatū Plains , passing the city of Palmerston North about 20 km (12 mi) west of it. It passes through Foxton , before reaching
1512-642: The Taieri Plains . The area between the Taieri and Waipori Rivers is flood-prone, and the highway crosses this on a major embankment known colloquially as the flood-free highway . SH 1 continues through gentle hill country and along the shore of Lake Waihola , then crosses the Tokomairiro Plains into Milton . South of Milton is a major junction with SH 8 at Clarksville Junction. SH 1 continues to cross rolling hill country to reach Balclutha . From Balclutha,
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#17328514518071584-566: The Taieri River was realigned during the 1970s. SH 1A ran from Orewa to Silverdale . When the Northern Gateway Toll Road opened, part of SH 1A was incorporated into SH 1N and the rest had its highway status revoked. SH 1F was the name previously given to the northernmost section of SH 1N – between Cape Reinga and the junction with SH 10 . This section is no longer a spur and is now part of SH 1N. Where SH 1 has moved onto
1656-724: The Tongariro National Park and into the Rangipo Desert , passing the volcanoes of Ruapehu , Ngauruhoe and Tongariro . The road between Rangipo (10 km (6.2 mi) south of Tūrangi) and Waiouru is commonly known as the Desert Road . SH 1 enters the Manawatū-Whanganui Region, and descends through an army training area to the end of the Desert Road at Waiouru . From Waiouru, the highway follows tributaries of
1728-573: The Waitematā Harbour , which it briefly follows before crossing it by the Auckland Harbour Bridge . The motorway comes off the bridge into Auckland's city centre, and forms its western boundary as SH 1 proceeds to the Central Motorway Junction . At this junction, SH 1 becomes the Auckland Southern Motorway , and, after sweeping around the southern end of central Auckland, proceeds in a south-easterly direction. The motorway continues in
1800-790: The Wellington Urban Motorway , skirting the shore of the harbour then passing the city centre to the west. The motorway ends at Te Aro , where a one-way system takes traffic to the Basin Reserve . Northbound traffic uses the Wellington Inner City Bypass (opened 2007), while southbound traffic uses Vivian Street . From the Basin Reserve, SH 1 travels through the Mount Victoria Tunnel to Wellington's eastern suburbs and Wellington International Airport . SH 1 ends at
1872-659: The official designations SH 1N in the North Island , SH 1S in the South Island . SH 1 is 2,006 kilometres (1,246 mi) long, 1,074 km (667 mi) in the North Island and 932 km (579 mi) in the South Island. Since 2010 new roads have reduced the length from 2,033 km (1,263 mi). 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 315 km (196 mi) of SH 1
1944-462: The 18.5 km (11.5 mi) Puhoi to Warkworth section began on 8 December 2016 with the official sod-turning. The motorway runs west of the current SH 1 alignment, starting at the end of the existing Auckland Northern Motorway and terminating onto the existing highway at Kaipara Flats Road, north of Warkworth township. The new motorway opened in June 2023. The NZTA released its preferred alignment for
2016-683: The Christchurch Southern Arterial Motorway, Curletts Road, Blenheim Road, and Main South Road. The section from the Queen Elizabeth II Drive to Brougham Street is now a local road, while the remainder of the route forms parts of SH 74 and 76. Re-routing also occurred in Whangarei and Timaru, removing SH 1 from their city centres. The original route through Whangārei via Kamo Road, Bank Street, Water Street and Maunu Road
2088-706: The Hutt Valley. The construction of the Ngauranga Interchange flyovers in 1984 allowed SH 1 to be diverted onto the motorway, bypassing central Wellington streets. The Christchurch Northern Motorway opened in October 1967 between Tram Road and Belfast, providing a second road crossing of the Waimakariri River . The motorway was extended northward to Pineacres in December 1970, bypassing Kaiapoi . The Western Belfast Bypass spur opened on 31 October 2017, extending
2160-575: The Moir Hill section, the road widens to 6 lanes with the addition of crawler lanes on the uphill sections. Near Puhoi , on the Hibiscus Coast , SH 1 becomes the Auckland Northern Motorway . This 7.5 km (4.7 mi) section of the motorway is an automated toll road . At Orewa , the motorway becomes toll-free, crossing farmland to the North Shore of Auckland . The road crosses through suburbs to
2232-783: The Nelson Street Cycleway was added to the list of projects in January 2015 by the Minister of Transport , Simon Bridges . The partners in this project were the NZ Transport Agency , Auckland Transport , and Auckland Council . GHD and Novare Design were the designers of the Lightpath with Monk Mackenzie Architects responsible for the urban and architectural design components. A 160-metre-long (520 ft) bridge weighing 260 tonnes (260 long tons; 290 short tons) connects Canada Street to
Central Motorway Junction - Misplaced Pages Continue
2304-481: The Northern and Southern Motorways, taking State Highway 1 off inner Auckland streets. The Waikato Expressway north of Te Kauwhata has largely been built on the existing line of SH 1N, although at Pōkeno the highway was diverted to bypass the town to the east. South of Te Kauwhata, most of the expressway has been built on a new line bypassing the towns of Ohinewai , Ngāruawāhia , Te Rapa and Cambridge , as well as
2376-554: The SH 1 designation until the new motorway opened. The Johnsonville-Porirua Motorway was constructed in the 1940s and 1950s to replace the Old Porirua Road . The first section of motorway between Johnsonville and Takapu Road opened on 23 December 1950, and is New Zealand's oldest motorway. The Wellington Urban Motorway was constructed between 1969 and 1978, but was originally part of State Highway 2 as it could only be accessed from
2448-585: The SH ;1 is classified as a regional strategic road, and north of Kawakawa where SH 1 is classified as a primary collector road. The sections between Wellsford and Wairakei , between Ōhau and Wellington Airport , and between Woodend and Rolleston are classified as high volume roads. The section from the Central Motorway Junction and the Newmarket Viaduct, 3 km (1.9 mi) to
2520-629: The Upper Queen Street bridge to cross the motorway. A disused offramp was repurposed in 2016 as a dedicated walking and cycling shared path, extending the Northwestern cycleway through to Nelson street. A purpose-built bridge connects Canada Street to the brightly painted and illuminated offramp now known as Lightpath/Te Ara I Whiti . The interchange's nickname comes from that of Gravelly Hill Junction in Birmingham , UK , which opened in 1972 and
2592-582: The Waitematā Harbour. Northern extensions of the motorway in 1969 (to Tristram Avenue), 1979 (to Sunset Road) and 1984 (to Dairy Flat Highway via Greville Road) diverted State Highway 1 off Wairau Road and Albany Highway. A motorway extension from Greville Road to Silverdale in 1999 bypassed Dairy Flat Highway, which was re-designated State Highway 17. In 2009, the Northern Motorway was extended to Puhoi, bypassing Hibiscus Coast Highway through Orewa which
2664-616: The Warkworth to Wellsford section for consultation in February 2017. The motorway will run from the Puhoi to Warkworth section west of Warkworth northward, passing east of Wellsford and Te Hana to terminate onto the existing highway at Mangawhai Road, just short of the Auckland/Northland boundary. Many ideas have come forth to create a Second Harbour Crossing over Waitematā Harbour to complement
2736-600: The aging Auckland Harbour Bridge. These include ideas for a second bridge, or a second tunnel with capacity for rail. At this stage, any meaningful progress is unlikely until at least 2025. As of October 2017, the NZTA is investigating extending the Waikato Expressway south of Cambridge 16 km (9.9 mi) to the SH 1/SH 29 intersection at Piarere, bypassing the existing highway around the shores of Lake Karapiro . Nelson Street Cycleway The Nelson Street Cycleway
2808-489: The bypass. In the southern South Island, several particularly twisting sections of SH 1S have been rebuilt to remove sharp bends and to generally improve road conditions. These include stretches at Normanby, near Timaru ; Waianakarua ; two stretches at Flag Swamp and Tumai between Palmerston and Waikouaiti ; and on the Dunedin Northern Motorway near Waitati . An extensive section between Allanton and
2880-655: The central city 2–3 blocks southeast of the heart of the CBD . At the southern end of central Dunedin, the highway becomes the Caversham By-pass, which rises along the Caversham Valley before again becoming a motorway at the saddle of Lookout Point. The four-lane motorway ( Dunedin Southern Motorway ) runs through Dunedin's southern suburbs until the interchange with SH 87 at Mosgiel . SH 1 then heads southwest across
2952-429: The central-eastern side of the peninsula to Kaitaia , New Zealand's northernmost town, then travels through a new piece of road in the Mangamuka Gorge before turning south-east across the Northland Peninsula on to Kawakawa in the Bay of Islands where the roadway is shared by the Bay of Islands Vintage Railway track, and then south to the city of Whangārei , the largest urban area in Northland. SH 1 then skirts
Central Motorway Junction - Misplaced Pages Continue
3024-399: The city centre. It is mainly in gullies and cuttings around the CBD, and its construction 1960–1970s removed whole neighbourhoods. It has somewhat of a hybrid function, falling between a typical ‘X’ interchange and ring road around the city centre. All linkages are direct and there is no separate ring road. The interchange and associated structures encircle the Auckland CBD on three sides,
3096-532: The city of Hamilton . Most old sections of SH 1N reverted to local arterial roads, while the former section through Hamilton became the SH 1C spur. Construction of the Peka Peka to Ōtaki extension to the Kāpiti Expressway began in mid 2017 and opened to traffic in December 2022. The project added 13 kilometres (8 mi) of expressway to the northern end of the Kāpiti Expressway at Peka Peka, to terminate north of Ōtaki at Taylors Road. The controversial Transmission Gully Motorway began construction in 2014, and
3168-400: The city of Invercargill . In central Invercargill it meets the southern end of SH 6 and turns due south, skirting the estuary of the New River and Bluff Harbour. It passes through the small town of Bluff before reaching its terminus at Stirling Point , a kilometre south of Bluff. A commemorative signpost at Stirling Point indicates distances to major world centres and to the start of
3240-490: The coast at Moeraki . From here the road again hugs the coast along Katiki Beach , remaining closer to the ocean than at any point since Kaikōura. The highway turns inland at Shag Point, passing through Palmerston and Waikouaiti . South of Waikouaiti the road again becomes steep, rising sharply over the Kilmog hill before dropping down to the coast at Blueskin Bay , then rising again via Dunedin-Waitati Highway (a two- to four-lane carriageway which used to be designated
3312-525: The coast, which it reaches at Timaru . Between Ashburton and Timaru it crosses Rangitata Island in the Rangitata River . South of Timaru, the road again passes through gentle hill country, staying close to the coast but largely out of sight of it. The road veers inland briefly, bypassing Waimate as it reaches the plains around the mouth of the Waitaki River , which it crosses to enter Otago . It passes through Oamaru , from where it turns inland briefly, crossing undulating hill country before again reaching
3384-405: The end of the coastal plain at Mackays Crossing . It then becomes the Transmission Gully Motorway and steeply ascends through mountainous terrain to the Wainui Saddle, before descending through its namesake to Pāuatahanui and bypassing Porirua to the east before reaching the northern suburbs of Wellington , New Zealand's capital city. Immediately after entering the city of Wellington in
3456-418: The end of the plain at Levin . From Levin, SH 1 follows the narrowing western coastal plain southwards. The highway crosses into the Wellington Region 15 km (9 mi) south of Levin, and just north of Ōtaki widens into the Kāpiti Expressway , a fully grade-separated four-lane dual carriageway. This expressway bypasses the Kāpiti conurbation of Waikanae , Paraparaumu and Raumati , before reaching
3528-482: The following four routes radiating from the city centre: The last of these links (Northwest Motorway eastbound to Auckland Northern Motorway northbound) officially opened on 19 December 2006, marking the completion of the junction. Plans have now shifted further north, with the tunnel at the Victoria Park Viaduct being the last of a set of three major motorway projects in the area. The CMJ includes city exits from SH1 and SH16 to downtown, Grafton Gully (the first of
3600-413: The former off-ramp. The bridge, designed by Novare Design was built in a workshop in Hamilton in eight sections and transported to Pukekohe for corrosion protection and painting. The southbound motorway lanes were closed overnight on seven occasions between 20 August and 10 September 2015 for preparations and to lift the bridge sections into place. In a video released by the NZ Transport Agency before
3672-414: The highway at Picton. SH 1 has two spurs, both in the vicinity of Hamilton : SH 1 has varied road conditions. For most of its length it is a two-lane single carriageway road with at-grade intersections and access, sealed with chipseal in rural areas or asphalt in urban and high-traffic areas. The highway has frequent passing lanes on these sections, to allow traffic to pass other vehicles safely. Parts of
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#17328514518073744-416: The highway crosses the Mataura River ; from here the road again turns south to roughly follow the river. The highway passes through Mataura before turning west at Edendale . Many travellers choose to turn onto SH 93 at Clinton, as this route shortens the journey between Clinton and Mataura by about 10 km (6.2 mi) and bypasses Gore . Over its last stretch the road veers southwest before reaching
3816-455: The highway turns south-west, narrows to a two-lane undivided road and passes through Templeton . It then merges onto the Christchurch Southern Motorway where the highway becomes expressway standard until it approaches Rolleston. South of Rolleston, SH 1 becomes virtually straight as it crosses the wide fan of the Canterbury plains, crossing the country's longest road bridge at Rakaia before reaching Ashburton , and then veering back towards
3888-401: The highway turns west, veering briefly north as it heads inland to avoid the rough hills of The Catlins . It passes through the small town of Clinton before reaching the major provincial town of Gore . Because of the names of these two towns, this stretch of the highway was christened "The Presidential Highway" during the time of the Clinton-Gore administration in the United States. At Gore,
3960-467: The latter feature inspired the Māori name. Stage 1 of the project was opened on 3 December 2015, and Stage 2 opened in December 2017. The last part of the route to the waterfront remains incomplete as of 2019. Once completed, the route will give access from Upper Queen Street to the Auckland CBD and the cycleway along the waterfront. Stage 1 utilises an unused off-ramp in the Central Motorway Junction (CMJ) where State Highway 1 and 16 cross – this
4032-520: The motorway southwest to The Groynes, allowing SH 1 traffic to bypass Belfast. The extension of the Dunedin Southern Motorway has also seen changes in the highway, notably to bypass the suburbs of Fairfield and Sunnyvale. In Hamilton, SH 1N originally ran through the city centre via Te Rapa Road, Ulster Street (first agreed as an alternative to the northern end of Victoria St in 1930), Victoria Street, Bridge Street and Cobham Drive; this original route later became Hamilton Urban Route 4. In 1992, SH 1N
4104-451: The next 220 km (140 mi). The Waikato Expressway bypasses Hamilton city centre to the east, then bypasses Cambridge to the north before reverting to a single carriageway east of the town. The highway continues eastward to the town of Tīrau , where it turns south to pass through Putāruru and Tokoroa and the surrounding exotic pine plantation forest area. At Wairakei, SH 1 takes an eastern route to bypass Taupō and meet
4176-415: The often congested motorways in central Auckland including the CMJ. The NZ Transport Agency was in November 2009 investigating a plan to extend the off-road Northwestern Cycleway through the intersection, to join it to Symonds Street and achieve better cycle linkages from the west into the Auckland CBD . In mid 2010, it became public that a preliminary alignment had been chosen, with the cycle path using
4248-443: The old off-ramp as a cycleway appears to first arise in the Central Motorway Junction Walking and Cycling Masterplan 2012 by the NZTA. Max Robitzsch, a transport engineer and member of Bike Auckland , is credited with helping turn this idea into reality, inspired by New York 's High Line . In May 2014, he organised a walking tour on the off-ramp for members of Cycle Action Auckland and the Auckland Transport Blog, and followed up with
4320-559: The opening of stage 1 of the project, the Nelson Street Cycleway was called "New Zealand's most ambitious piece of cycling infrastructure". The project was opened 3 December 2015 by Ernst Zöllner (Regional Director Auckland/Northland for the Transport Agency ), transport minister Bridges, Chris Darby (elected member of Auckland Council ), and Barbara Cuthbert (chair of Bike Auckland, recently renamed from Cycle Action Auckland). Stage 2 opened in December 2017 and extends along Nelson Street from Victoria Street West to Fanshaw Street, and then
4392-416: The road are steep by international standards. Most steep sections having a combination of passing lanes (uphill), and crawler lanes or stopping bays (downhill) to allow heavy and slow vehicles to pull out of the way to let other vehicles pass. Waka Kotahi classifies the most part of State Highway 1 as a national strategic road. The exceptions are between Kawakawa and Whangārei and south of Mosgiel, where
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#17328514518074464-399: The small town of Ward the highway heads to the coast and follows it to Kaikōura . After passing Kaikōura, it veers inland, twisting tortuously through the Hundalee Ranges before emerging at the northern end of the Canterbury Plains . The section of highway between the Clarence River and Hapuku Rivers north of Kaikōura was closed from 14 November 2016 to 15 December 2017, due to damage from
4536-457: The south, is the country's busiest section of road, with more than 200,000 vehicle movements a day between Khyber Pass Road and Gillies Ave. NZTA announced in September 2010 that it was replacing the last three fords on SH 1S. The shingle fan fords are near Kaikōura , and while generally being dry, on about 28 days a year state highway traffic used to detour around them due to high water levels on old single-lane bridges, leading to delays on
4608-453: The south-western Whangārei Harbour, nearing the coast briefly at Ruakākā , before proceeding down to wind through the Brynderwyn Hills before approaching the upper reaches of the Kaipara Harbour . The highway crosses into the Auckland Region , and passes through Wellsford and Warkworth , again heading for the east coast. Just north of Warkworth , the road widens to a four-lane motorway known as Ara Tuhono, Puhoi to Warkworth motorway. In
4680-410: The suburb of Linden , the Transmission Gully Motorway ends, and SH 1 merges on to the Johnsonville-Porirua Motorway . The motorway gradually ascends through Tawa before reaching Johnsonville . Here, the motorway ends, and SH 1 as a six-lane arterial road steeply descends through the Ngauranga Gorge to the Ngauranga Interchange , on the shore of Wellington Harbour . At Ngauranga , SH 1 becomes
4752-453: The three large motorway projects, containing the section of the Northwest Motorway between the Upper Queen Street bridge and The Strand in Parnell , and the Auckland Southern Motorway between Symonds Street exit and The Strand), with five other pairs of ramps giving access to the central area. A noteworthy structural component of the CMJ is the area underneath Karangahape Rd, where 19 lanes of traffic forming nine distinct links pass through
4824-409: The urban road network at traffic lights at Union Street. From here, a protected cycleway runs along the left side of Nelson Street for three blocks, crossing Cook Street and Wellesley Street West at traffic lights. The route currently finishes at Victoria Street West, where the facility crosses the signalised intersection diagonally to the north-east quadrant. In 2005, the motorway off-ramp that made
4896-561: Was diverted to run through Frankton via Avalon Drive, Greenwood Street, Kahikatea Drive and Normandy Avenue. The Frankton route then became the SH 1C spur in July 2022, with SH 1N being diverted to the newly-opened Hamilton section of the Waikato Expressway . In Christchurch, SH 1S originally ran via the city centre rather than around the outskirts via Harewood. The original route was via Main North Road, Cranford Street, Sherborne Street, Bealey Avenue, Madras and Gasson Streets (north)/Barbadoes Street and Waltham Road (south), Brougham Street,
4968-460: Was diverted via Western Hills Drive, while the original route through Timaru via Stafford and King Streets was diverted via Theodosia Street and Craigie Avenue. In 2010, the Taupō Bypass was constructed shifting the original SH 1 from the township and lakeside to the eastern outskirts of Taupō. The bypass starts at Wairakei near the existing SH 1/SH 5 intersection and finishes to the north of Taupo Airport. The concurrency with SH 5 also follows part of
5040-411: Was given the nickname "Spaghetti Junction". Many complex interchanges around the world have also been given the same nickname . New Zealand State Highway 1 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
5112-432: Was officially opened on 30 March 2022. It provides a new alignment for State Highway 1 between Mackays Crossing and Linden , diverting the route from the Centennial Highway between Paekākāriki and Pukerua Bay , as well as providing an eastern bypass of Porirua . The previous route of State Highway 1 was renumbered to State Highway 59 on 7 December 2021, which created a temporary 26.2 kilometres (16.3 mi) gap in
5184-463: Was re-designated part of SH 17. However, SH 17 was short lived, being revoked in September 2012 and reverting to a local arterial road. Ara Tuhono, the Puhoi to Warkworth motorway, was opened in June 2023. The Auckland Southern Motorway was built between 1953 and 1978, bypassing the former route via Great South Road . The construction of the Central Motorway Junction between 1973 and 1978 connected
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