North–South Motorway#Northern Connector

In 2010, the Australian Government, through the Nation Building Program project, committed $500 million and the South Australian Government committed $432 million to the North–South Corridor over five years. This funding allocation recognised that South Road is the only continuous link between the northern and southern suburbs as well as the spine connecting Adelaide's major inter-modal transport hubs – Adelaide Airport, Islington Rail Terminal, Port Adelaide and Outer Harbor.{{cite web|url=http://www.economicstimulusplan.gov.au/pages/default.aspx|title=Nation Building - Economic Stimulus Plan|author=Australian Government|date=26 June 2010|access-date=26 June 2010|archive-url=https://web.archive.org/web/20100701120338/http://www.economicstimulusplan.gov.au/pages/default.aspx|archive-date=1 July 2010|url-status=dead}}

In May 2015, a government strategy paper envisioned that the entire non-stop north–south road corridor would be completed by 2025, including "an upgraded South Road". It stated that the planned "non-stop motorway" would "cater for the unimpeded flow of longer distance northbound and southbound trips" and would not include "at-grade traffic signals, intersections, junctions or property accesses which cause vehicles to slow down or stop".{{Cite web |url=http://www.infrastructure.sa.gov.au/__data/assets/pdf_file/0009/166392/new-delivery-strategy.pdf |pages=4–6 |date=May 2015 |title=North–South Corridor: The 10 year Strategy |publisher=Department of Planning, Transport and Infrastructure, Government of South Australia |url-status=dead |archive-url=https://web.archive.org/web/20160321123428/https://www.infrastructure.sa.gov.au/__data/assets/pdf_file/0009/166392/new-delivery-strategy.pdf |archive-date=21 March 2016 |quote=Adelaide's North-South Corridor will consist of a high speed non-stop managed motorway supported by a parallel surface arterial South Road. The non-stop motorway is intended to cater for the unimpeded flow of longer distance northbound and southbound trips, while the surface arterial South Road will cater for shorter distance and local trips.}}

The motorway is divided into sections for the purposes of construction. Since March 2021, four out of five sections have been completed. From north to south the sections are:

File:NSC Area Map.png

Plans for a motorway connecting South Road and the Northern Expressway surfaced in early 2008 when the Northern Expressway was awaiting construction; the Northern Connector would be an eight-lane motorway linking the Northern Expressway and South Road, with three intermediate interchanges.{{cite web|url=http://infrastructure.sa.gov.au/northern_connector/content |title=Northern Connector |publisher=Infrastructure S.A. |access-date=2010-06-12 |url-status=dead |archive-url=https://web.archive.org/web/20100608112917/http://www.infrastructure.sa.gov.au/northern_connector/content |archive-date=8 June 2010 }} The project was proposed to include a major diversion in the main ARTC interstate rail line, which would run down the middle of the new motorway between Dry Creek, South Australia and Taylors Road at Waterloo Corner.{{cite web|url=http://infrastructure.sa.gov.au/__data/assets/pdf_file/0008/41102/Northern_Connector_Brochure_V4_June.pdf |title=northern connector |publisher=Infrastructure S.A. |access-date=2010-06-12 |url-status=dead |archive-url=https://web.archive.org/web/20091015042708/http://www.infrastructure.sa.gov.au/__data/assets/pdf_file/0008/41102/Northern_Connector_Brochure_V4_June.pdf |archive-date=15 October 2009 }} The federal government proposed that it could be the state's first toll road.{{cite web |url=http://www.adelaidenow.com.au/messenger/north-northeast/federal-government-push-to-make-11bn-northern-connector-south-australia8217s-first-toll-road/story-fni9ll1r-1226696649318 |title=Federal Government push to make $1.1bn Northern Connector South Australia's first toll road |first=Duane |last=Schultz |work=News Review Messenger |date=13 August 2013 |access-date=5 July 2015}}

In September 2015, the Premier of South Australia, Jay Weatherill and Prime Minister of Australia Tony Abbott announced that the road component of the project would start construction in early 2016. The federal government would provide {{AUD|788M|link=yes}} towards an expected total cost of {{AUD|985M}}. The project was reduced to three lanes each way with two intermediate interchanges. The railway component was removed, with a corridor reserved on the western side of the motorway for future use.{{cite web |url=http://www.infrastructure.sa.gov.au/nsc/northern_connector |title=Northern Connector Project |access-date=14 September 2015 |publisher=Department of Planning, Transport and Infrastructure South Australia}} The road is not subject to direct tolls, but South Australia will become a testing ground for a "network fee" which involves charging trucks based on road use and impact in place of high registration fees.{{cite news |url=http://www.adelaidenow.com.au/news/opinion/northern-connector-work-to-start-on-crucial-985-million-adelaide-road-link/story-fni6unxq-1227525473889 |work=The Advertiser |title=Northern Connector Work to Start on Crucial $985 Million Adelaide Road Link |publisher=News Corp |first1=Peter |last1=Jean |first2=Paul |last2=Starick |date=14 September 2015 |access-date=14 September 2015}}

The first new bridge to open to traffic was the bridge over the new motorway at the Waterloo Corner interchange. This bridge was opened in March 2019 to provide the new access route into St Kilda, replacing several roads that had been cut by the motorway. The last road to be closed in the area was St Kilda Road, three days after the new bridge opened.{{cite news |url= http://www.cruise1323.com.au/newsroom/waterloo-corner-overpass-opened-northern-connector-adelaide |title=Finally! New overpass at Waterloo corner has opened |date=26 March 2019 |publisher=Cruise 1323 |access-date=27 March 2019}}

The next new bridges were the twin bridges over the Port River Expressway at the southern interchange. They replaced the original Craig Gilbert Bridge which was closed and demolished in May 2019.{{cite web |url=https://dpti.sa.gov.au/__data/assets/pdf_file/0014/551300/DOCS_AND_FILES-13993187-v1-PREXY_closure_24_to_27_May_2019_NORTHERN_CONNECTOR_PROJECT_APPROVED_PDF_.PDF |title=Port River Expressway weekend closure and detours, 24-27 May |publisher=Department of Planning, Transport and Infrastructure |work=Northern Connector Project |quote=This closure will allow for the demolition of the Craig Gilbert Bridge over PREXY as part of the construction of the Southern Interchange. |access-date=19 May 2019 |date=May 2019}} A temporary off-ramp from South Road to Salisbury Highway was provided, which used the new southbound bridge and the future Port River Expressway to South Road on-ramp. In July 2019, the bridge for the end-state off-ramp opened to traffic, carrying north east traffic over the Northern Connector.{{cite web |url=https://www.dpti.sa.gov.au/__data/assets/pdf_file/0003/568407/Bridge_3_South_Road_Superway_off_ramp_to_Salisbury_Highway_OPENING_2-_Northern_Connector_project.pdf |work=North-South Corridor Northern Connector Project |title=New South Road Superway off-ramp opening |date=8 July 2019 |access-date=23 July 2019}}

The bridge over the expressway at Bolivar Road opened for access into the Bolivar Waste Water Treatment Plant about a week before Christmas 2019. The final alignment of the northbound carriageway of Port Wakefield Road at the northern interchange opened at about the same time, over a new bridge that passes over the southbound on-ramp from Port Wakefield Road. The whole road opened to traffic on 7 March 2020.{{cite news |url=https://www.adelaidenow.com.au/news/south-australia/adelaides-biggest-road-project-the-northern-connector-set-to-open-this-weekend/news-story/26f6ec0f5d0d8630d6c84679f3e476dc |title=Adelaide's biggest road project, the Northern Connector, set to open this weekend |first=Matt |last=Smith |newspaper=The Advertiser |date=3 March 2020 |access-date=3 March 2020}}

Lendlease was awarded the contract.[https://web.archive.org/web/20250123060720/https://www.lendlease.com/contentassets/4b93c8d8186f4a3382b2c13cd936b398/documents/20160601-northern-connector-announcement.pdf Lendlease to deliver Northern Connector road project] Lendlease 1 June 2016 The announcement included support for other sectors of the South Australian economy, with a requirement that 7,500 tonnes of steel would be sourced from Arrium, and that the work would stimulate urban renewal and generate employment locally in other sectors.{{cite web | title=Lendlease wins contract for Adelaide's Northern Connector | website=Construction Index | date=2 June 2016 | url=https://www.theconstructionindex.co.uk/news/view/lendlease-wins-contract-for-adelaides-northern-connector | access-date=30 April 2022}} There was a contractual obligation that at least half of the 480 workers were required to be hired from the northern suburbs of Adelaide, where other industries had been reducing or shutting down their workforces, such as Holden.{{Cite news|url=http://www.adelaidenow.com.au/news/south-australia/lendlease-engineering-chosen-to-build-and-construct-northern-connector-work-to-start-next-month/news-story/388d1b16ca053d008a6c6a688c329346| title=Lendlease Engineering chosen to build and construct Northern Connector, work to start next month| last=Novak|first=Lauren|date=31 May 2016|work=The Advertiser|access-date=2 June 2016| url-access=subscription}} At least 20% of the workforce were required to be either Aboriginal, an apprentice/ trainee, or long-term unemployed.{{cite web | title=Lendlease awarded $985m Northern Connector Project | website=Felix | date=1 June 2016 | url=https://www.felix.net/project-news/lendlease-awarded-985m-northern-connector-project | access-date=30 April 2022}}

In November 2016, it was announced that the majority of the road surface would be concrete, rather than asphalt as used on most roads in South Australia. This was expected to have a slightly higher up-front cost, but significantly lower maintenance costs over 30 years.{{cite news |work=The Advertiser |publisher=News Corp Australia |url=http://www.adelaidenow.com.au/news/south-australia/985-million-northern-connector-to-be-south-australias-first-major-concrete-road-creating-more-jobs/news-story/10f4be0efe7872a01ecf08c846693788 |title=$985 million Northern Connector to be South Australia's first major concrete road, creating more jobs |first=Paul |last=Starick |date=16 November 2016 |publication-date=17 November 2016 |access-date=17 November 2016}}

Major construction started in December 2016, with completion anticipated in December 2019.{{cite press release |url=http://www.infrastructure.sa.gov.au/__data/assets/pdf_file/0004/284935/Major_construction_begins_on_Northern_Connector_project_.pdf |title=Major construction begins on Northern Connector project |author=Paul Fletcher, Federal Minister for Urban Infrastructure |author2=Jay Weatherill, Premier of South Australia |author3=Stephen Mullighan, SA Transport and Infrastructure Minister |date=6 December 2016 |access-date=7 December 2016}} Nine bridges were built for the project. The Southern Interchange required three bridges. The Bolivar and Waterloo Corner Interchanges each required a bridge over the expressway. The northern interchange required a new bridge for the northbound carriageway of Port Wakefield Road to cross the southbound on-ramp. The motorway crosses North Arm Creek, Dry Creek and the Little Para River.{{cite web |url=https://gateway.icn.org.au/project/get-attachment/63861/northern-connector-project-icn-breakfast-23-aug-2016-pdf |publisher=Industry Capability Network |title=Northern Connector Project Breakfast |date=23 June 2016 |access-date=7 December 2016}}

The project was divided into six zones. Zone 1 containing the northern interchange was let to McMahon Services. Zone 2 contained the Waterloo Corner interchange, and was let to LR&M Constructions. Zone 3 contained the Bolivar interchange and the bridge over the Little Para River and was subcontracted to Catcon. Zone 4 was the Bolivar intersection with Port Wakefield Road, let to SEM Group. Zone 5 crossed Dry Creek and the salt pans. Zone six was the southern interchange. Zones 5 and 6 were both managed directly by Lendlease. The shared use path along the eastern side of the road was constructed by Intract Indigenous Contractors,{{rp|47}} and is named Tapa Martinthi Yala.{{cite web |url=https://www.sa.gov.au/__data/assets/pdf_file/0005/591755/Gaz-Not-Northern-Connector-Bridges-and-Shared-Use-Path-9-Jan-2020.pdf |publisher=Government of South Australia |ref=DPTI: 2019/14082/01 |title=Notice to Assign a Names to Bridges and Shared-Use Path |work=South Australian Government Gazette |date=2 January 2020 |page=10 |access-date=13 January 2020}}

The raw materials to make the concrete for the road were supplied by Adbri, and mixed on-site. The road was reinforced with steel from Liberty OneSteel and asphalt was supplied by Boral.[https://web.archive.org/web/20171201034050/https://www.trailermag.com.au/news/article/three-contracts-awarded-on-885m-northern-connector Three contracts awarded on $885M Northern Connector] Trailer Magazine 16 November 2017

The South Road Superway is an elevated motorway in the northern suburbs of the South Australian capital city of Adelaide.{{cite web|title=Use the South Road Superway and save time: Northbound lanes to open on Thursday night|url=http://www.infrastructure.sa.gov.au/__data/assets/pdf_file/0005/125357/DOCS_AND_FILES-8392710-v1-North-bound_opening_superway_2.pdf|work=Media Release|publisher=Government of South Australia|access-date=7 May 2014|author=Department of Planning, Transport and Infrastructure|archive-url=https://web.archive.org/web/20140507014648/http://www.infrastructure.sa.gov.au/__data/assets/pdf_file/0005/125357/DOCS_AND_FILES-8392710-v1-North-bound_opening_superway_2.pdf|archive-date=7 May 2014|url-status=dead|date=13 March 2014}} The 2.8 km elevated roadway rises just north of Taminga Street, Regency Park and goes over Days Road, before access ramps at Grand Junction Road. It continues over Cormack Road and the Dry Creek railway line to join the intersection of the Port River Expressway and Salisbury Highway where the motorway continues northwards.{{cite web|url=http://www.southroad.sa.gov.au/content/south_road_superway=|title=South Road Superway: Demography|author=Infrastructure SA|date=21 May 2010|access-date=26 June 2010}}{{Dead link|date=April 2020 |bot=InternetArchiveBot |fix-attempted=yes }}

In 2009, an announcement was made to build an elevated roadway above South Road, from just north of Regency Road to the end of South Road where it joins to the Port River Expressway and the Salisbury Highway. The elevated roadway was constructed at a cost of A$812 million and opened in March 2014. At the time, the Superway was the biggest single investment in a road project in South Australia's history.{{cite web|url=http://www.southroad.sa.gov.au/content/south_road_superway=|title=South Road Superway: Demography|author=Infrastructure SA|date=21 May 2010|access-date=26 June 2010}}{{Dead link|date=April 2020 |bot=InternetArchiveBot |fix-attempted=yes }} The Superway delivered a 4.8 kilometre section of freeway grade road, including a 2.8 kilometre elevated roadway, from the Port River Expressway to Regency Road. Along the way, it passes over the Dry Creek-Port Adelaide railway line, Cormack Road, Grand Junction Road and Days Road, with exits at Grand Junction Road and Days Road.

South Road was previously designated as part of route A13, when South Australia moved to the alpha-numeric road route system in 1998, with the section between the Salisbury Highway in Wingfield and Grand Junction Road in Regency Park designated as part of National Highway A13. When the South Road Superway was opened in 2014, route A13 was replaced entirely by route A2. As the section of South Road designated National Highway A13 was replaced by the South Road Superway, this was replaced by National Highway M2. This was modified to route M2 in 2017, to match designs used across the rest of the state.

File:NSCSouthSup1.jpg

South Australian civil engineering and construction company, Bardavcol, was awarded the early works local roads contract for the South Road Superway. The design and construction contract was awarded to Urban Superway Joint Venture, comprising the John Holland Group, Macmahon Contractors and Leed Engineering & Construction.{{cite web|url=http://www.southroad.sa.gov.au/content/south_road_superway/improving_transport_efficiency=|title=Project Overview: Demography|author=Infrastructure SA|date=30 April 2010|access-date=29 June 2010}}{{Dead link|date=April 2020 |bot=InternetArchiveBot |fix-attempted=yes }}

Construction of the local connector roads was completed in early 2011, with the completion of construction of Gallipoli Drive. This road replaced South Road as the main distributor road in the area during construction. Construction of the superway proper commenced in early 2011.{{cite web|url=http://www.infrastructure.sa.gov.au/south_road_upgrade/content/south_road_superway|title=Project official webpage|author=Infrastructure SA|date=30 April 2010|access-date=29 June 2010|archive-url=https://web.archive.org/web/20100724040659/http://www.infrastructure.sa.gov.au/south_road_upgrade/content/south_road_superway|archive-date=24 July 2010|url-status=dead}} Construction was completed in March 2014. The southbound lanes opened in February 2014. The left turn entry from the Port River Expressway opened in January 2014.{{cite web|url=http://www.infrastructure.sa.gov.au/south_road_upgrade/northsouthcorridor/south_road_superway/latest_news_and_construction_update|title=Project official webpage|author=Infrastructure SA|date=30 April 2010|access-date=2 February 2014}}{{Dead link|date=April 2020 |bot=InternetArchiveBot |fix-attempted=yes }} The northbound lanes opened in March 2014.{{cite web |url=http://infrastructure.sa.gov.au/south_road_upgrade/northsouthcorridor/south_road_superway |title=South Road Superway |publisher=Department of Planning, Transport and Infrastructure |date=14 March 2014 |access-date=1 September 2014 |archive-url=https://web.archive.org/web/20150704182519/http://www.infrastructure.sa.gov.au/south_road_upgrade/northsouthcorridor/south_road_superway |archive-date=4 July 2015 |url-status=dead }}

After construction of the South Road Superway and the Torrens-to-Torrens lowered motorway, this {{convert|1.8|km}} section of road was left with two traffic light intersections, including Regency Road, a controlled pedestrian crossing, and access to local side streets. It was reported in May 2017 that completion of this section would cost $400 million, with construction to begin at the start of 2019 and be completed by the middle of 2022. This would complete 47 km of freeway from Gawler to the River Torrens. The state government said it was seeking 85% of the cost to be funded by the federal government, which had not committed to the spend.{{cite news |url= http://www.adelaidenow.com.au/news/south-australia/south-rd-upgrade-construction-to-start-between-regency-rd-and-pym-st/news-story/b26cc21b02b6ddec9caa2042276ec7ec |title= South Rd upgrade: Construction to start between Regency Rd and Pym St |first= Daniel |last=Wills |newspaper= The Advertiser |date= 15 May 2017 |access-date= 28 February 2018}}

Completion of this section was committed to by the state and federal governments in May 2018. The announcement stated that the cost would be {{AUD|354m}} but did not state an expected completion date. It included an overpass of Regency Road and a pedestrian and cycling connection over the freeway near Pym Street. The motorway portion is three lanes each way, with an additional two lanes each way on the surface road to provide local access to community and businesses.{{cite web |url=https://www.infrastructure.sa.gov.au/nsc/regency_road_to_pym_street |title=Regency Road to Pym Street |access-date=30 April 2018 |publisher=Department of Planning, Transport and Infrastructure}}

The contract for the design and construction of the {{convert|1.8|km}} motorway segment with three lanes in each direction, plus two lanes each way providing local access to the surrounding community and businesses, was awarded in July 2019 to a consortium of McConnell Dowell, Mott MacDonald and Arup Group. All three members have been involved in other major infrastructure projects in South Australia, notably the Oaklands railway station grade separation. Main construction began in late 2019.{{cite press release |url=https://dpti.sa.gov.au/__data/assets/pdf_file/0005/568904/Regency_to_Pym_media_release.pdf |title=Building Regency to Pym to begin this year |date=5 July 2019 |access-date=9 July 2019 |first=Alan |last=Tudge |author-link=Alan Tudge |work=Minister for Cities, Urban Infrastructure and Population |agency=Department of Planning, Transport and Infrastructure |publisher=Government of South Australia}} The overpass opened in March 2021.{{cite web |url=https://r2palliance.com.au/project/latest-news/regency-road-overpass-open-to-traffic |title=Regency Road overpass open to traffic |date=30 March 2021 |publisher=R2P Alliance |url-status=live |archive-url=https://web.archive.org/web/20210514103412/https://r2palliance.com.au/project/latest-news/regency-road-overpass-open-to-traffic |archive-date=14 May 2021}}{{cite press release |last=Wingard |first=Corey |date=19 February 2021 |title= Regency to Pym project on the home stretch – finishing early and under budget |url= https://www.premier.sa.gov.au/news/media-releases/news/regency-to-pym-project-on-the-home-stretch-finishing-early-and-under-budget |url-status=live |location=Adelaide |publisher=Government of South Australia |agency=Premier of South Australia |archive-url= https://web.archive.org/web/20210321052652/https://www.premier.sa.gov.au/news/media-releases/news/regency-to-pym-project-on-the-home-stretch-finishing-early-and-under-budget |archive-date=21 March 2021 |access-date=21 March 2021}}

In 2013, the State Labor government in partnership with the Federal Labor government announced an upgrade to approximately 4 km of road between Torrens Road and the River Torrens. The upgrade featured a new, lowered road under Grange and Port Roads to provide a non-stop route through the area for north–south traffic, and to reduce delays for east–west travel. A parallel surface road was built along the length of the lowered road, to connect the majority of local roads and arterial roads to South Road. A rail overpass of South Road was built for the Outer Harbor rail line. Construction started in 2015, with the project expected to be completed by the end of 2018.{{cite web |url=http://www.infrastructure.sa.gov.au/t2t |title=North-South Corridor: Torrens Road to River Torrens |date=5 August 2015 |id=145594 |publisher=Department of Planning, Transport and Infrastructure, Government of South Australia |access-date=8 August 2015}}{{cite web |url=http://www.t2talliance.com.au/ |title=T2T |publisher=T2T Alliance |date=31 July 2015 |access-date=8 August 2015}}

The project scope was extended in December 2015 to include an underpass of Torrens Road, at no additional project cost or time.{{cite web |url=http://www.infrastructure.sa.gov.au/nsc/torrens_road_to_river_torrens_project/scope_extension |title=Torrens Road to Torrens River Project Scope Extension |publisher=Department of Planning, Transport and Infrastructure |access-date=12 December 2015}} The lowered motorway opened in September 2018.{{Cite web|url=https://www.adelaidenow.com.au/news/south-australia/torrens-to-torrens-part-of-south-rd-upgrade-to-open-this-weekend/news-story/e7119f755f12fd248a67a4280c7bfca6|title=Torrens to Torrens Part of South Road Upgrade to Open This Weekend|website=AdelaideNow|access-date=1 October 2018}}{{cite web |url=http://www.t2talliance.com.au/wp88/wp-content/uploads/TORRENS-ROAD-TO-RIVER-TORRENS-LOWERED-MOTORWAY-TO-OPEN-TO-TRAFFIC.pdf |date=28 September 2018 |title=TORRENS ROAD TO RIVER TORRENS LOWERED MOTORWAY TO OPEN TO TRAFFIC |publisher=Government of South Australia}}{{Cite web |url=http://roadsonline.com.au/north-south-corridor-open-to-traffic/ |date=1 October 2018 |title=North-South Corridor open to traffic |work=RoadsOnline.com.au}}

Before the motorway is built, traffic congestion in this section is presently mitigated by the Gallipoli Underpass at Anzac Highway and the nearby Glenelg Tram Overpass, both completed in 2009, and the Emerson Overpass over Cross Road and Seaford railway line, completed in 1985. These measures are only considered interim solutions and will be upgraded prior to or concurrently with the rest of this section of road.{{cite web |url=http://www.infrastructure.sa.gov.au/__data/assets/pdf_file/0009/166392/new-delivery-strategy.pdf |date=May 2015 |title=North–South Corridor The 10 year Strategy |id=K-Net #9526649, V1 |publisher=Department of Planning, Transport and Infrastructure |access-date=6 April 2016 |url-status=dead |archive-url=https://web.archive.org/web/20160321123428/https://www.infrastructure.sa.gov.au/__data/assets/pdf_file/0009/166392/new-delivery-strategy.pdf |archive-date=21 March 2016}}{{rp|54}} The increasing frequency of commuter trains has resulted in growing bottlenecks at the Emerson Overpass as queues on the exit ramps to Cross Road can extend into the through lanes on South Road. The rail crossing can be closed for up to 20 minutes in the peak hour.{{rp|16}}

In August 2018, the possibility was raised that this section could be completed by tunnelling under the existing alignment.{{cite news |url=https://www.adelaidenow.com.au/news/south-australia/state-government-puts-the-possibility-of-tunnels-back-on-the-table-for-northsouth-corridor/news-story/cbcc17f82f170aa6992f5d2d5a0bed80 |title=State Government puts the possibility of tunnels back on the table for North-South corridor |first=Matt |last=Smith |newspaper=The Advertiser |date=10 August 2018 |access-date=3 September 2018}} In 2020 the State Government was pursuing two options to complete this section. The first was an open motorway formed of at-grade, elevated and lowered portions, reminiscent of completed sections of the North–South Motorway, with short cut-and-cover tunnels where necessary. The second is a "hybrid option", with an open motorway between James Congdon Drive and Edward Street, Clarence Gardens, flanked by longer bored tunnels at the northern and southern ends.{{cite web |url=https://dpti.sa.gov.au/__data/assets/pdf_file/0005/700088/2020_Projects_Pipeline_Industry_Briefing.pdf |title=2020 Projects Pipeline Industry Briefing |date=4 August 2020 |access-date=30 August 2020 |url-status=live |archive-url=https://web.archive.org/web/20200830042256/https://dpti.sa.gov.au/__data/assets/pdf_file/0005/700088/2020_Projects_Pipeline_Industry_Briefing.pdf |archive-date=30 August 2020}} Geotechnical works to investigate both options started in August 2020.{{cite web |url=https://infrastructuremagazine.com.au/2020/07/22/4-52-million-contract-awarded-for-north-south-corridor/ |title=$4.52 million contract awarded for North South Corridor |date=22 July 2020 |access-date=30 August 2020 |url-status=live |archive-url=https://web.archive.org/web/20200830043129/https://infrastructuremagazine.com.au/2020/07/22/4-52-million-contract-awarded-for-north-south-corridor/ |archive-date=30 August 2020}}

The 2020 state budget announced the preferred approach which would consist of two stages: Stage 1 would deliver a 4.3 km deep-bored tunnel and a 1 km lowered motorway from Darlington to Anzac Highway. Stage 2 would deliver a 2 km deep-bored tunnel from Sir Donald Bradman Drive to West Thebarton Road, with surface motorway and underpasses making up the remaining portions of Stage 2. The budget estimated the project cost at $8.9 billion.{{cite web |url=https://indaily.com.au/news/2020/11/10/budget-2020-the-key-measures/ |title=Budget 2020: The key measures |date=10 November 2020 |publisher=InDaily |url-status=live |archive-url=https://web.archive.org/web/20201110055708/https://indaily.com.au/news/2020/11/10/budget-2020-the-key-measures/ |archive-date=10 November 2020}}

The full project reference design—finalising the approach from the 2020 stage budget—was released in November 2021. Stages 1 and 2 are expected to start construction in 2023 and 2026 respectively, with the full project planned for completion in 2031.{{cite web |url=https://www.abc.net.au/news/2021-11-28/sa-torrens-to-darlington-project-design-released/100657244 |title=Final design for South Australian government's Torrens to Darlington road project released |date=28 November 2021 |website=ABC News |publisher=Australian Broadcasting Corporation |url-status=live |archive-url=https://web.archive.org/web/20211213125910/https://www.abc.net.au/news/2021-11-28/sa-torrens-to-darlington-project-design-released/100657244 |archive-date=13 December 2021}}{{cite press release |title=T2D reference design released |url=https://dit.sa.gov.au/nsc/torrens_to_darlington/news?a=959539 |location=Adelaide, South Australia |publisher=Department for Infrastructure and Transport |date=29 November 2021 |archive-url=https://web.archive.org/web/20211213130818/https://dit.sa.gov.au/nsc/torrens_to_darlington/news?a=959539 |archive-date=13 December 2021 |access-date=13 December 2021}}

{{clear}}

{{AUSinttop|LGA_ref={{cite web |url=https://location.sa.gov.au/viewer/?map=hybrid&x=136.19383&y=-32.61774&z=7&uids=11 |title=Location SA Map viewer with LGA layers |publisher=Government of South Australia |accessdate=16 June 2022}}|location_ref={{cite web |url=https://location.sa.gov.au/viewer/?map=hybrid&x=136.19383&y=-32.61774&z=7&uids=19 |title=Location SA Map viewer with suburb layers |publisher=Government of South Australia |accessdate=16 June 2022}}|length_ref=}}

{{SAint

|LGAC=Playford

|LGAspan=2

|location_special={{SAcity|Waterloo Corner}}–{{SAcity|Virginia}} boundary

|lspan=3

|type=trans

|km=0.0

|uspan=2

|road={{AUshield|SA|M2}} Northern Expressway (M2){{SAcity|p=on|Gawler}}

|notes=Northern terminus of motorway, route M2 continues northeast along Northern Expressway

}}

{{SAint

|type=incomplete

|km=none

|road={{AUshield|SA|A1}} Port Wakefield Highway (A1){{SAcity|p=on|Virginia|Port Wakefield}}

|notes=No exit to and entry from Port Wakefield Road

}}

{{SAint

|LGAC=Salisbury

|LGAspan=2

|type=incomplete

|km=3.2

|road=Waterloo Corner Road{{SAcity|p=on|Salisbury|St Kilda}}

|notes=No exit southbound to Waterloo Corner Road

}}

{{SAint

|location=Bolivar

|type=

|km=7.2

|road={{AUshield|SA|A18}} Bolivar Road (A18){{SAcity|p=on|Parafield Gardens|Paralowie}}

|notes=

}}

{{SAint

|LGAC=Port Adelaide Enfield

|LGAspan=5

|location=Wingfield

|lspan=2

|type=incomplete

|km=15.3

|road={{AUshield|SA|A9}} Salisbury Highway (A9 east){{SAcity|p=on|Salisbury}}
{{AUshield|SA|A9}} Port River Expressway (A9 west){{SAcity|p=on|Port Adelaide}}

|notes=No exit southbound to Salisbury Highway

}}

{{SAint

|type=incomplete

|km=17.2

|road={{AUshield|SA|A16}} Grand Junction Road (A16){{SAcity|p=on|Port Adelaide|Gepps Cross|Northfield|Hope Valley}}

|notes=Southbound exit and northbound entry only; southbound exit to, and northbound entry from, Days Road

}}

{{SAint

|location=Regency Park

|type=incomplete

|km=18.2

|road=Days Road{{SAcity|p=on|Regency Park}}

|notes=Northbound exit and southbound entry only; northbound exit to, and southbound entry from, Grand Junction Road

}}

{{SAint

|location_special={{SAcity|Regency Park}}–{{SAcity|Croydon Park}} boundary

|km=

|road=Regency Road{{SAcity|p=on|Kilkenny|Prospect}}

|notes=Entries and exits via South Road

}}

{{SAint

|location=Croydon Park

|km=20.9

|bridge=Pedestrian and cyclist overpass (Pym Street)

}}

{{SAint

|LGAC=Charles Sturt

|LGAspan=5

|location_special={{SAcity|Croydon}}–{{SAcity|Ridleyton}} boundary

|lspan=2

|type=incomplete

|km=22.6

|road={{AUshield|SA|A7}} Port Road (A7){{SAcity|p=on|Port Adelaide|Woodville|Thebarton}}, Adelaide CBD

|notes=Southbound exit and northbound entry only; southbound exit to, and northbound entry from, Grange Road/Manton Street

}}

{{SAint

|km=22.9

|bridge=Outer Harbor railway line

}}

{{SAint

|location_special={{SAcity|Hindmarsh}}–{{SAcity|West Hindmarsh}} boundary

|lspan=3

|type=incomplete

|km=23.9

|road=Grange Road (west){{SAcity|p=on|Grange|Allenby Gardens}}
Manton Street (east){{SAcity|p=on|Hindmarsh}}

|notes=Northbound exit and southbound entry only; northbound exit to, and southbound entry from, Port Road

}}

{{SAint

|km=24.1

|uspan=2

|type=incomplete

|road=Hindmarsh Avenue

|notes=Northbound entry and exit only

}}

{{SAint

|type=trans

|km=none

|road={{AUshield|SA|A2}} South Road (A2){{SAcity|p=on|Mile End|Edwardstown|St Marys}}

|notes=Southern terminus of motorway and route M2, route A2 continues south along South Road

}}

{{Jctbtm |conv=no |keys=incomplete,trans}}

{{portal-inline|Australian Roads}}

{{commons category|North-South Motorway, Adelaide}}

{{Reflist}}

• [http://dpti.sa.gov.au/infrastructure/nsc/south_road_superway South Road Superway Project official webpage]

{{Road infrastructure in Adelaide}}

{{DEFAULTSORT:North-South Motorway}}

Category:Freeways and highways in Adelaide