{{Short description|Motorway in Auckland, New Zealand}} {{Use dmy dates|date=June 2015}} {{Use New Zealand English|date=June 2015}} {{Infobox road |country= NZL |type= SH |route= 1 |name= Auckland Northern Motorway |map={{maplink|frame=yes|plain=yes|frame-align=center|type=line}} |map_custom=yes |length_mi= |length_km= 58 |length_ref= |established= 30 May 1959 |direction_a= North |terminus_a= {{jct|country=NZL|SH|1}} near [[Warkworth, New Zealand|Warkworth]] |junction={{plainlist|1= *{{jct|country=NZL|SH|18}} at Constellation Drive *{{jct|country=NZL|SH|16|name1= [[Northwestern Motorway]] }} at [[Auckland CBD|Auckland City Centre]] }} |direction_b= South |terminus_b={{jct|country=NZL|SH|1|name1= [[Auckland Southern Motorway|Southern Motorway]] }} at Auckland City Centre |destinations= Puhoi, Orewa, Silverdale, Albany, Takapuna, Northcote, Auckland City }} [[File:NrthMway from Forrest Hill.jpg|thumb|300px|right|The Northern Motorway and [[Northern Busway, Auckland|Northern Busway]] from [[Forrest Hill, New Zealand|Forrest Hill]], looking west.]] [[File:Northern Motorway2.JPG|thumb|300px|right|The Northern Motorway northern approach to the Auckland Harbour Bridge, looking across [[Waitematā Harbour]] to downtown Auckland.]]
The '''Auckland Northern Motorway''' (known locally as the '''Northern Motorway''', and historically as the '''Auckland–Warkworth Motorway''') in the [[Auckland Region]] of New Zealand links [[Auckland isthmus|Central Auckland]] and [[Warkworth, New Zealand|Warkworth]] in the former [[Rodney District]] via the [[Hibiscus Coast]] and [[North Shore, New Zealand|North Shore]]. It is part of [[State Highway 1 (New Zealand)|State Highway 1]].
It is {{convert|58|km}} in length, with 17 junctions. Until the end of the 1980s, it was largely associated with the [[Auckland Harbour Bridge]] as a connection between central Auckland and the North Shore. Between the 1959 opening of the motorway and 1984, [[toll road|toll]]s were collected on the Auckland Harbour Bridge, and since 2009 tolls have been collected on the Northern Gateway Toll Road.<ref>{{cite web |title=Northern Gateway Toll Road opening date announced |url=https://www.nzta.govt.nz/media-releases/northern-gateway-toll-road-opening-date-announced |publisher=NZ Transport Agency Waka Kotahi |access-date=31 December 2025}}</ref>
In 2019, 170,000 vehicles per day were crossing the Harbour Bridge section of the motorway.<ref>{{cite news|url=https://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=12210993|accessdate=11 April 2019|title=The next harbour crossing: road and rail, or just rail|date=9 March 2019|work=[[The New Zealand Herald]]}}</ref>
==Route== The Northern Motorway starts near Puhoi, in the former [[Rodney District]], at the southern end of the Puhoi-Warkworth Motorway, which opened in 2023.
The initial 7 km section is an automated-toll road, also known as the '''Northern Gateway Toll Road'''. It begins by travelling under Johnstone's Hill though 340-metre long twin tunnels. The electronic toll-registering gantry is at the southern end. At the first junction, west of Orewa, the motorway becomes toll free.
The next 17 km to Albany runs through a mainly rural environment. An interchange at Silverdale provides access to the [[Hibiscus Coast]] and the [[Whangaparāoa Peninsula]], and access to the alternative toll-free route north via Urban Route 31 (formerly [[State Highway 17 (New Zealand)|State Highway 17]]). The Orewa interchange can also be used, but requires driving through local residential areas. South of the junction at Dairy Flat is the motorway's only service centre, which serves northbound traffic, and is the toll cash-payment point for northbound traffic.
The motorway then descends steeply into the northern suburbs of the former [[North Shore City]], the northern of Auckland's four former cities. Crawler lanes are provided for heavy vehicles between Oteha Valley Road and Greville Road. The Greville Road interchange was until 1999 the northern terminus, with the current northbound entrance and exit ramps following the old formation down to the roundabout intersection with Albany Highway.
The motorway proceeds south-east through the suburbs of the North Shore, with interchanges at Constellation Drive, Tristram Avenue, Northcote Road and Esmonde Road allowing access to the suburbs. The Constellation Drive interchange is the northern terminus of the [[Western Ring Route]], which provides an alternative north–south motorway route around Auckland via the [[State Highway 18 (New Zealand)|Upper Harbour Motorway]] and the [[Northwestern Motorway]].
At Esmonde Road, the motorway turns south-west to follow the northern shore of the [[Waitematā Harbour]] to Northcote Point, where it crosses the [[Auckland Harbour Bridge]]. The bridge has a [[reversible lane|contraflow system]] on it which allows five lanes southbound and three northbound during morning rush hour, five lanes northbound and three southbound during evening rush hour, and four lanes each way at other times. The lanes are separated by a moveable median barrier.
Coming off the bridge, the road turns sharply to head eastwards towards the [[Auckland CBD|Auckland city centre]]. An interchange with Fanshawe Street allows access to the northern end of the city centre, and also allows lanes to be dropped ahead of the narrow four-lane [[Victoria Park Viaduct]]. The motorway then turns south-east across the Victoria Park Viaduct, and travels down the western side of the city centre, with an exit at Cook Street for the southern end of the city centre.
The motorway emerges at the top of the [[Central Motorway Junction]] ("Spaghetti Junction") and terminates at the [[Northwestern Motorway]], becoming the [[Auckland Southern Motorway|Southern Motorway]].
===Northern Gateway toll=== Tolls for the Northern Gateway Toll Road are collected electronically, using an automated toll plaza just north of the Grand Drive interchange. The automated toll plaza uses [[automatic number-plate recognition]] to identify the vehicle: the number plate is optically read and details checked against the New Zealand Transport Agency's (NZTA) database, any pre-payment made or account open for that particular vehicle. Additional sensors detect the size of the vehicle, to help prevent misreads of registration plates and to notice plate swaps between cars and trucks. If the computer system needs assistance in recognising plates or for any other reason, data is sent to the NZTA office in [[Palmerston North]] for human analysis.<ref name="TollRoadWorks">{{cite web |url= https://www.nzta.govt.nz/roads-and-rail/toll-roads/toll-road-information/how-electronic-tolling-works/ |title= How electronic tolling works - New Zealand Transport Agency |accessdate= 2016-01-26| archiveurl= https://web.archive.org/web/20100602064452/http://www.tollroad.govt.nz/About/How| archivedate= 2 June 2010 | url-status= live}}</ref><ref>{{cite web |url= https://www.nzta.govt.nz/roads-and-rail/toll-roads/toll-road-information/tolls-and-fees/ |title= Tolls and fees |publisher=NZTA |accessdate= 2016-01-26}}</ref>
Each toll cost 78 cents to collect in May 2010.<ref>{{cite web |url=http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=10648815 |title=Toll-dodger faces $26,500 in fines |author=Dearnaley, Mathew |date=1 June 2010 |work=[[The New Zealand Herald]] |accessdate=1 June 2010}}</ref>
==History== [[File:Auckland Northern Motorway near Harbour Bridge, May 1960.jpg|thumb|300px|right|The Northern Motorway between the Auckland Harbour Bridge and the then Fanshawe Street terminus in May 1960. Photo by Denis Wilford.]] The first section of the Northern Motorway opened on 30 May 1959, in conjunction with the opening of the Auckland Harbour Bridge. The motorway totalled 7.4 km, from Northcote Road to Fanshawe Street. On its opening day, 51,000 vehicles crossed the Harbour Bridge, with southbound traffic backing up for 10 km north of the toll plaza (near the present Stafford Road exit) with vehicles wishing to cross the bridge for the first time.<ref>{{cite web |url= https://www.youtube.com/watch?v=M3Tu1WbjN1I |archive-url=https://ghostarchive.org/varchive/youtube/20211213/M3Tu1WbjN1I |archive-date=2021-12-13 |url-status=live|title= Auckland harbour bridge opening 1959 - YouTube video |website=[[YouTube]] |accessdate=2010-07-11}}{{cbignore}}</ref> Initially, the Auckland Harbour Bridge Authority owned and operated the motorway between Fanshawe Street and the toll plaza, while the National Roads Board (the predecessor to the New Zealand Transport Agency) operated the remainder of the motorway from the toll plaza to Northcote Road. During the motorway's construction and widening, large sections of Smiths Bush, a remnant [[kahikatea]] and [[Beilschmiedia tarairi|taraire]] forest, were destroyed.<ref name="FieldGuide2008">{{cite book |last1=Cameron |first1=Ewen |last2=Hayward |first2= Bruce |author-link2=Bruce Hayward |last3=Murdoch |first3= Graeme |title=A Field Guide to Auckland: Exploring the Region's Natural and Historical Heritage |isbn=978-1-86962-1513 |publisher=Random House New Zealand |year=2008 |edition=rev. |page=144}}</ref>
Access to the bridge was at first motorway limited, with all ramps facing towards the Harbour Bridge. Tolls for the bridge were collected manually, with cars initially paying 2/6 (two shillings and sixpence) to cross the bridge (equivalent to about $5.50 in 2017 [[New Zealand dollar|dollars]]).<ref>{{cite web|url=http://www.rbnz.govt.nz/monetary-policy/inflation-calculator|title=New Zealand Inflation Calculator - Reserve Bank of New Zealand |accessdate=25 July 2017|publisher=Reserve Bank of New Zealand}}</ref>
In 1962, the [[Victoria Park Viaduct]] opened, and the motorway was extended south from Fanshawe Street, over the viaduct, to Cook Street/Wellington Street. In 1969, the motorway was extended northwards from Northcote Road to Tristram Avenue, and the Auckland Harbour Bridge's clip-on lanes opened, widening the bridge from four lanes to eight lanes.
In 1978, the motorway was extended south to meet the Southern Motorway at Nelson Street/[[Hobson Street, Auckland|Hobson Street]]. This allowed motorway traffic a clear run from Tristram Avenue to St Stephens, on the northern side of the [[Bombay Hills]].
In 1979, the Northern Motorway was extended northward to Sunset Road, near the present Constellation Drive interchange. The motorway ended at a set of traffic lights on the top of a hill, giving limited visibility to motorway traffic. In 1984 a two-lane expressway opened, continuing from Sunset Road to Greville Road and on towards Albany Highway. On 30 March 1984, the last tolls were collected for the Harbour Bridge, making the entire Northern Motorway free of charge from 31 March 1984.<ref name="AkldMwy" />
In the 1980s, [[reversible lanes|tidal flow]] was introduced on the Harbour Bridge to assist with peak flows on the Northern Motorway between the North Shore and central Auckland. The two central lanes were made reversible to allow a 5+3 split favouring the peak direction (southbound in the morning, northbound in the evening) during peak hours, and 4+4 off-peak. The lanes were controlled by overhead signals, which some motorists on the Motorway ignored and were killed when they [[head-on collision|collided head-on]] with oncoming traffic - between 1 January 1989 and 27 November 1989, five people died as a result of collisions involving the so-called "suicide lanes".<ref>{{cite web|url=http://www.3news.co.nz/First-3-News-bulletin-1989/tabid/1258/articleID/130455/Default.aspx |title=First 3 News bulletin - 27 November 1989 |work=[[3 News]] |date=1989-11-27 |accessdate=2010-07-11 |url-status=dead |archiveurl=https://web.archive.org/web/20120910224330/http://www.3news.co.nz/First-3-News-bulletin-1989/tabid/1258/articleID/130455/Default.aspx |archivedate=10 September 2012 |df=dmy }}</ref> In 1990, a moveable barrier was installed to separate the traffic flows.
The expressway between Sunset Road and Greville Road was upgraded and became a part of the Northern Motorway in 1994. A new interchange was then created at Upper Harbour Highway and Constellation Drive to replace the Sunset Road intersection.<ref name="AkldMwy" />
The late 1990s saw the construction of the first stages of the Albany to Puhoi Realignment (ALPURT) – a 27 km extension of the Northern Motorway, bypassing Albany hill and the Hibiscus Coast Highway. The first section, ALPURT A, opened between Greville Road and Silverdale on 20 December 1999. At 13 km in length, it was the longest section of motorway to open at once in New Zealand. At the same time, ALPURT B1, a two-lane expressway between Silverdale and the back of Orewa opened.<ref name="AkldMwy" />
In 2006, an upgrade to the Central Motorway Junction saw ramps open between the Northern Motorway and the Northwestern Motorway, and between the Northern Motorway and Grafton Gully. Beforehand, traffic travelling from the Northern Motorway to the Northwestern Motorway or Grafton Gully had to exit at Cook Street and travel through local city streets to connect to [[West Auckland, New Zealand|West Auckland]] or the [[Ports of Auckland]].
ALPURT B2, the Northern Gateway Toll Road, opened on 25 January 2009 between Orewa and Puhoi. The Northern Gateway Toll Road was the first automated toll road in New Zealand, and the first under the authority of the [[NZ Transport Agency]]. At the same time, ALPURT B1 was upgraded to motorway standard to complete the Northern Motorway from central Auckland to Puhoi.<ref name="AkldMwy">{{cite web |url= http://www.nzta.govt.nz/resources/auckland-motorways/docs/2008.pdf |title= Auckland Motorways 2008 |work= New Zealand Transport Agency |accessdate=2010-01-27}}</ref>
The [[Victoria Park Tunnel]] project was completed in early 2012 having been opened earlier in the year. Three northbound lanes were constructed in a cut-and-cover tunnel next to the existing four-lane viaduct. The viaduct, previously two lanes in each direction, was reconfigured to two pairs of southbound lanes; one pair accessing the Cook Street off-ramp and Port and Northwestern Motorway connections, the other connecting to the Southern Motorway. In addition to the tunnel a movable median barrier on the northbound section between the tunnel and the Harbour Bridge allows five northbound lanes to be used in peak traffic times. The southbound section was also permanently widened to five lanes.<ref>{{cite web |url= http://www.nzta.govt.nz/projects/victoria-park-tunnel/ |title= NZTA - Victoria Park Tunnel |date= 20 November 2012}}</ref>
=== Puhoi–Warkworth === {{Maplink|frame=yes|type=line|text=Map of Pūhoi to Warkworth Motorway|id=Q115616115}} The Puhoi–Warkworth motorway is an {{cvt|18.5|km}} extension of the Auckland Northern Motorway from the Johnstones Hill Tunnels to just outside the town of [[Warkworth, New Zealand|Warkworth]]. This section is the first stage of a plan to extend the motorway to [[Wellsford, New Zealand|Wellsford]].<ref>{{cite report|title=Archaeological Monitoring of Vegetation Management, Post-Earthwork Visits and Archaeological Interpretation of Geophysical Survey Results on Two Pā (R10/921 and R10/1369) for Nx2 Motorway Project|date=July 2024|first1=Simon|last1=Bickler|first2=Tom|last2=Clough-Macready}}</ref> The contract for the section from Puhoi to Warkworth was awarded in November 2016 under a public-private partnership<ref>{{cite news |url=https://www.nzta.govt.nz/media-releases/ppp-contract-awarded-for-puhoi-to-warkworth-motorway-project |title=PPP contract awarded for Pūhoi to Warkworth motorway project |work=NZ Transport Agency |date=3 November 2016 |accessdate=6 November 2016}}</ref> and was opened in June 2023.<ref>{{Cite web |date=2023-06-19 |title='A beautiful drive': Pūhoi to Warkworth motorway opens to excited commuters |url=https://www.rnz.co.nz/news/national/492270/a-beautiful-drive-puhoi-to-warkworth-motorway-opens-to-excited-commuters |access-date=2023-06-28 |website=[[RNZ]] |language=en-nz}}</ref>
===Northern Busway=== {{Main|Northern Busway, Auckland}} Although not technically part of the Northern Motorway, the [[Northern Busway, Auckland|Northern Busway]] is closely associated with the motorway. The first section of the 6.2 km [[bus rapid transit]] lanes opened in January 2008, and runs along the eastern side of the motorway between [[Constellation busway station]] (near the Constellation Drive interchange) and [[Akoranga busway station]] (near the Esmonde Road interchange). An additional 2.5 km southbound bus lane, opened in 2009, runs from Akoranga station to the Harbour Bridge approaches at the Onewa Road interchange. Dedicated ramps connect the busway with the Northern Motorway at Constellation Drive and at [[Albany busway station]] near the Oteha Valley Road interchange.
==Future== {{Maplink|frame=yes|type=line|text=Route of Penlink (under construction)|id=Q7163086}}
===Under construction===
* '''[[Penlink]]''' - A link road between SH1 and the Whangaparaoa Peninsula. This road will begin from a new interchange on the Northern Motorway near Redvale.<ref>[http://www.rodney.govt.nz/DistrictTownPlanning/Projects/penlink/Pages/PenlinkProject3.aspx] {{Webarchive|url=https://web.archive.org/web/20090223105618/http://www.rodney.govt.nz/DistrictTownPlanning/Projects/penlink/Pages/PenlinkProject3.aspx|date=23 February 2009}} Rodney District Council Website</ref> This road was originally planned as a toll road by the Rodney District Council. In 2008 the New Zealand Government announced that Penlink would be fully funded by a new regional fuel tax. In 2009 this decision was reversed.<ref name="Stuff.co.nz_2254362">{{cite web |url=http://www.stuff.co.nz/auckland/local-news/rodney-times/2254362/Penlink-under-a-cloud |title=Penlink under a cloud |author=Caralise Moore & Mike Bishara |date=12 March 2009 |work=Rodney Times via [[Stuff (website)|Stuff]] |accessdate=17 September 2011}}</ref> Construction began on 22 December 2022.<ref>{{Cite web |url=https://www.nzta.govt.nz/media-releases/breaking-ground-on-a-ground-breaking-venture/|title=Breaking ground on a ground-breaking venture|date=10 December 2022| access-date=28 June 2023}}</ref>
===Proposed===
* '''[[Second Harbour Crossing, Auckland|Second Harbour Crossing]]''' - A second crossing over the Waitematā Harbour. Proposals for a second crossing have undergone numerous changes, investigations and cancellations over many years.{{cn|date=June 2024}}
==Interchanges== <!-- [[File:Northern Motorway1.JPG|thumb|300px|right|The Northern Motorway northbound lanes, just south of the Esmonde Road interchange.]] --> {{Jcttop|exit |unnum=no |state_col=[[Territorial authority]] |nocty=yes}} {{Jctint|exit |county_special = [[Auckland Council|Auckland]] — [[Rodney (local board area)|Rodney]] Board<ref>{{cite web |url= http://www.lgc.govt.nz/lgcwebsite.nsf/Files/AKGMarch10Vol2/$file/AucklandGovernanceArrangementsVolume2.pdf |title= Auckland Governance Arrangements: Maps relating to Determinations of Wards, Local Boards and Boundaries for Auckland |work= Local Government Commission |date= March 2010 |accessdate= 2010-07-10 |archive-url= https://web.archive.org/web/20100602104552/http://www.lgc.govt.nz/lgcwebsite.nsf/Files/AKGMarch10Vol2/$file/AucklandGovernanceArrangementsVolume2.pdf |archive-date= 2 June 2010 |url-status= dead }}</ref> |cspan = 3 |location_special = Puhoi |lspan = 3 |road = {{jct|country=NZL|SH|1|name1=Puhoi–Warkworth Motorway|location1=[[Warkworth, New Zealand|Warkworth]], [[Te Hana]]}} |notes = Northern Gateway Toll Road begins |type = etc }} {{Jctint|exit |exit = 386 |type = etc |road = {{jct|country=NZL|road|Puhoi Road|location1=Puhoi}} |notes = Northern Gateway Toll Road continues }} {{jctbridge|exit |tunnel = [[File:AB-Tunnel.svg|1em]] ''Johnstone's Hill Tunnels'' ({{nowrap|340 m}}) }} {{Jctint|exit |county_special = [[Auckland Council|Auckland]] — [[Rodney (local board area)|Rodney]]/[[Hibiscus Coast|Hibiscus]] and [[East Coast Bays|Bays]] Boards |cspan = 4 |location_special = Orewa |exit = 394 |road = {{jct|country=NZL|road|Grand Drive|location1=Orewa}} |notes = Northern Gateway Toll Road ends |type = etc }} {{Jctint|exit |location_special = Millwater |exit = 396 |type = incomplete |road = {{jct|country=NZL|road|Wainui Road/Millwater Parkway|location1=Millwater}} |notes = Northbound exit and southbound entrance; opened May 2015<ref>{{cite news |first= Anne |last= Gibson |date= 11 May 2015 |title= New motorway interchange will ease access for 10,000 Millwater residents |url= http://www.nzherald.co.nz/business/news/article.cfm?c_id=3&objectid=11446800 |work=[[The New Zealand Herald]] |accessdate= 1 June 2015}}</ref> }} {{Jctint|exit |location_special = Silverdale |km = 398.0 |exit = 398<ref group=coord>{{coord|-36.625172|174.662876|format=dms|scale:10000|name=Silverdale Interchange, Auckland Northern Motorway}} Silverdale Interchange, Auckland Northern Motorway; exit 398</ref> |road = {{Jct|country=NZL|UR|31|name1=Hibiscus Coast Highway|location1=[[Silverdale, Auckland|Silverdale]]}} |notes = Toll-free Route 31 north<br />(formerly SH 17) }} {{Jctint|exit |location_special = Dairy Flat |km = 401.9 |exit = 398<ref group=coord>{{coord|-36.659434|174.667511|format=dms|scale:10000|name=Dairy Flat Service Centre, Auckland Northern Motorway}} Dairy Flat Service Centre</ref> |road = [[File:AB-Tank.svg|1em]] [[File:AB-Rast.svg|1em]] Dairy Flat Service Centre |notes = Northbound only |type = incomplete }} {{Jctint|exit |county_special = [[Auckland Council|Auckland]] — Upper Harbour Board |cspan = 4 |location_special = Albany North |km = 409.9 |exit = 410 |road = {{Jct|country=NZL|UR|29|name1=Oteha Valley Road|location1=[[North Harbour Stadium]], [[Albany, New Zealand|Albany]]}} }} {{Jctint|exit |location_special = Rosedale |lspan = 3 |km = 411.8 |exit = 412<ref group=coord>{{coord|-36.735961|174.718087|format=dms|scale:10000|name=Greville Road Interchange, Auckland Northern Motorway}} Greville Road Interchange, Auckland Northern Motorway</ref> |road = {{Jct|country=NZL|UR|31|name1=Albany Expressway |location1=[[Albany, New Zealand|Albany]], [[North Harbour Stadium]], [[Massey University#Auckland Campus (Albany)|Massey University]]}}<br/>{{Jct|country=NZL|UR|25|name1=Greville Road |location1=Rosedale, [[Browns Bay, New Zealand|Browns Bay]]}} }} {{Jctint|exit |km = 413.4 |exit = 413 |road = {{jct|country=NZL|SH|18|name1=Upper Harbour Motorway|location1=[[Greenhithe, New Zealand|Greenhithe]], [[Waitākere, Auckland|Waitakere]]}} |notes = Southbound exit and northbound entrance<ref>{{cite news|url=https://www.stuff.co.nz/national/300834995/24b-auckland-motorway-project-completed-with-construction-of-new-underpass|title=$2.4b Auckland motorway project completed with construction of new underpass|publisher=[[Stuff (website)|Stuff]] |date=21 March 2023}}</ref> |type = incomplete }} {{Jctint|exit |km = 414.0 |exit = 414<ref group=coord>{{coord|-36.750800|174.726000|format=dms|scale:10000|name=Upper Harbour Highway Interchange, Auckland Northern Motorway}} Upper Harbour Highway Interchange, Auckland Northern Motorway</ref> |road = {{jct|country=NZL|road|Constellation Drive|location1=[[Mairangi Bay]]}} }} {{Jctint|exit |county_special = [[Auckland Council|Auckland]] — [[Kaipatiki]]/[[Devonport, New Zealand|Devonport]]-[[Takapuna]] Ward |cspan = 3 |location_special = Forrest Hill |km = 416.8 |exit = 417 |road = {{Jct|country=NZL|UR|21|name1=Tristram Avenue|location1=Wairau Park, [[Wairau Valley, Auckland|Wairau Valley]], [[Glenfield, New Zealand|Glenfield]], [[Forrest Hill, New Zealand|Forrest Hill]]}} }} {{Jctint|exit |location_special = Northcote |km = 418.8 |exit = 419 |road = {{jct|country=NZL|road|Northcote Road|location1=[[Northcote, Auckland|Northcote]], [[North Shore Hospital]], [[Milford, New Zealand|Milford]] }} }} {{Jctint|exit |location_special = Akoranga |km = 420.3 |exit = 420 |road = {{jct|country=NZL|UR|26|name1=Esmonde Road|location1=[[Takapuna]], [[Devonport, New Zealand|Devonport]], [[Auckland University of Technology|AUT]]}} }} {{Jctint|exit |county_special = [[Auckland Council|Auckland]] — Kaipatiki Board |cspan = 2 |location_special = Northcote |km = 422.0 |exit = 421 |road = {{Jct|country=NZL|UR|27|name1=Onewa Road|location1=[[Northcote, Auckland|Northcote]], [[Birkenhead, New Zealand|Birkenhead]]}} |notes = Southbound entrance accessible only from east }} {{Jctint|exit |location_special = Northcote Point |km = 422.9 |exit = 422 |road = {{jct|country=NZL|road|Stafford Road}} |notes = Northbound exit only |type = incomplete }} {{jctbridge|exit |county_special = |river = [[Waitematā Harbour]] |km = 423.2 |bridge = [[File:AB-Brücke.svg|1em]] ''[[Auckland Harbour Bridge]]''<ref group=coord>{{coord|-36.830447|174.740553|format=dms|scale:10000|name=Auckland Harbour Bridge}} Auckland Harbour Bridge</ref>
}} {{Jctint|exit |county_special = [[Auckland Council|Auckland]] — [[Waitemata City|Waitemata]] Board |cspan = 8 |location_special = St Mary's Bay |km = 425.0 |exit = 423 |road = {{Jct|country=NZL|road|Shelly Beach Road|location1=[[Ponsonby, New Zealand|Ponsonby]], [[Herne Bay, New Zealand|Herne Bay]]}} |notes = Southbound exit and northbound entrance |type = incomplete }} {{jctint|exit |location_special = Auckland CBD |lspan = 7 |km = 426.2 |exit = 424A |road = {{jct|country=NZL|UR|6|name1=Fanshawe Street|location1=City Centre (North)}} |notes = Southbound exit and northbound entrance |type = incomplete }} {{jctbridge|exit |km = 426.6 |bridge = [[File:AB-Tunnel.svg|1em]] ''[[Victoria Park Tunnel]] (northbound, {{nowrap|440 m}})''<br/> [[File:AB-Brücke.svg|1em]] ''[[Victoria Park Viaduct]] (southbound)''<ref group=coord>{{coord|-36.847045|174.753095|format=dms|scale:10000|name=Victoria Park Viaduct}} Victoria Park Viaduct</ref> }} {{jctint|exit |km = 427.0 |lspan = 2 |exit = 424B |road = {{jct|country=NZL|road|Cook Street|location1=City Centre (South)}} |notes = Southbound exit only |type = incomplete }} {{jctint|exit |road = {{jct|country=NZL|road|Wellington Street|location1=City Centre (South)}} |notes = Northbound entrance only |type = incomplete }} {{jctint|exit |km = 427.2 |exit = 424C |road = {{jct|country=NZL|SH|16|name1=[[Northwestern Motorway]]|dir1=east|location1=[[Ports of Auckland]]|extra=ferry}} |notes = Southbound exit and northbound entrance |type = incomplete }} {{jctint|exit |exit = 424D |road = {{jct|country=NZL|SH|16|name1=[[Northwestern Motorway]]|dir1=west|location1=[[Waitākere, Auckland|Waitākere]], [[Helensville]]}} |notes = Southbound exit and northbound entrance |type = incomplete }} {{jctint|exit |km = 427.0 |road = {{jct|country=NZL|SH|1|name1=[[Auckland Southern Motorway|Southern Motorway]]|dir1=south|location1=[[South Auckland|Manukau]], [[Hamilton, New Zealand|Hamilton]]}} |notes = ''Northern Motorway ends''{{ref|km}} |type = incomplete }} {{Jctbtm|exit|conv=no|keys=incomplete,toll}} ;Coordinate list <references group=coord/> *{{note|km}} Distance rounds down to 427 km at the beginning of the Southern Motorway.
==See also== *[[List of motorways and expressways in New Zealand]]
==References== {{Reflist}}
{{New Zealand motorway list}} {{Streets in Auckland}}
[[Category:Transport in Auckland]] [[Category:Motorways in New Zealand]] [[Category:State Highway 1 (New Zealand)]] [[Category:North Shore, New Zealand]]