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North–South Motorway

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North–South Motorway

South Australia
Travelling southbound under the Port Road bridge in the lowered motorway, September 2018
Map
Coordinates
General information
TypeMotorway
LocationAdelaide
Length24.1 km (15 mi)[1]
Opened2014[2]
Route number(s) M2 (2014–present)[2]
Former
route number		 National Highway M2 (2014–2017)
(Wingfield–Regency Park)
Major junctions
North end Northern Expressway
Waterloo Corner, Adelaide
 
South end South Road
Hindmarsh, Adelaide
Location(s)
RegionNorthern Adelaide, Western Adelaide[3]
Major suburbsBolivar, Wingfield, Regency Park
Highway system

The North–South Motorway is a partially complete motorway traversing the inner western suburbs of Adelaide, from Waterloo Corner in the north to Bedford Park in the south. Progressively constructed in stages since 2010, once complete it will replace the adjacent South Road as Adelaide's main north–south roadway. It will form the central section of the North–South Corridor, being flanked north and south by the Northern Expressway and Southern Expressway, respectively. It is designated part of route M2.

By March 2021, approximately 24.1 kilometres (15.0 mi) of the motorway had been completed, with the remaining 10.5 kilometres (6.5 mi) in detailed planning and design stage. The full project is planned for completion in 2031.

Background

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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.[4]

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".[5] 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".[5]

Sections

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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:

Section Status Opened
Northern Connector Complete 7 March 2020
South Road Superway Complete 13 March 2014
Regency Road to Pym Street Complete 30 March 2021
Torrens Road to River Torrens Complete 29 September 2018
River Torrens to Darlington In design TBA
The planned extent of the North–South Motorway is shown in orange within Adelaide's north–south corridor

Northern Connector

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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.[6] 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.[7] The federal government proposed that it could be the state's first toll road.[8]

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 A$788M towards an expected total cost of A$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.[9] 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.[10]

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.[11]

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.[12] 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.[13]

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.[14]

Construction

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Lendlease was awarded the contract. 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,[15] and that the work would stimulate urban renewal and generate employment locally in other sectors.[16] There was a contractual obligation that at least half of the 480 workers were required to be hired from the northern suburbs of Adelaide,[17] where other industries had been reducing or shutting down their workforces, such as Holden.[15] At least 20% of the workforce were required to be either Aboriginal, an apprentice/ trainee, or long-term unemployed.[17]

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.[18]

Major construction started in December 2016, with completion anticipated in December 2019.[19] 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.[20]

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 S.E.M. 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,[20]: 47  and is named Tapa Martinthi Yala.[21]

The raw materials to make the concrete for the road were supplied by Adelaide Brighton Cement, and mixed on-site. The road was reinforced with steel from Liberty OneSteel and asphalt was supplied by Boral.[22]

South Road Superway

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The South Road Superway is an elevated motorway in the northern suburbs of the South Australian capital city of Adelaide.[2] 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.[23]

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.[24] 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.[2] This was modified to route M2 in 2017, to match designs used across the rest of the state.

Construction

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The South Road Superway taking shape at Days Road intersection, April 2012

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.[25]

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.[26] 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.[27] The northbound lanes opened in March 2014.[28]

Regency Road to Pym Street

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After construction of the South Road Superway and the Torrens-to-Torrens lowered motorway, this 1.8 kilometres (1.1 mi) 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.[29]

Completion of this section was committed to by the state and federal governments in May 2018. The announcement stated that the cost would be A$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.[30]

The contract for the design and construction of the 1.8 kilometres (1.1 mi) 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.[31] The overpass opened in March 2021.[32][33]

Torrens Road to River Torrens

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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.[34][35]

The project scope was extended in December 2015 to include an underpass of Torrens Road, at no additional project cost or time.[36] The lowered motorway opened in September 2018.[37][38][39]

River Torrens to Darlington

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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.[40]: 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.[40]: 16 

In August 2018, the possibility was raised that this section could be completed by tunnelling under the existing alignment.[41] 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.[42] Geotechnical works to investigate both options started in August 2020.[43]

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.[44]

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.[45][46]

Exits and interchanges

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LGA[47]Location[1][48]km[1]miDestinationsNotes
PlayfordWaterloo Corner–Virginia boundary0.00.0 Northern Expressway (M2) – GawlerNorthern terminus of motorway, route M2 continues northeast along Northern Expressway
Port Wakefield Highway (A1) – Virginia, Port WakefieldNo exit to and entry from Port Wakefield Road
Salisbury3.22.0Waterloo Corner Road – Salisbury, St KildaNo exit southbound to Waterloo Corner Road
Bolivar7.24.5 Bolivar Road (A18) – Parafield Gardens, Paralowie
Port Adelaide EnfieldWingfield15.39.5 Salisbury Highway (A9 east) – Salisbury
Port River Expressway (A9 west) – Port Adelaide		No exit southbound to Salisbury Highway
17.210.7 Grand Junction Road (A16) – Port Adelaide, Gepps Cross, Northfield, Hope ValleySouthbound exit and northbound entry only; southbound exit to, and northbound entry from, Days Road
Regency Park18.211.3Days Road – Regency ParkNorthbound exit and southbound entry only; northbound exit to, and southbound entry from, Grand Junction Road
Regency Park–Croydon Park boundaryRegency Road – Kilkenny, ProspectEntries and exits via South Road
Croydon Park20.913.0Pedestrian and cyclist overpass (Pym Street)
Charles SturtCroydon–Ridleyton boundary22.614.0 Port Road (A7) – Port Adelaide, Woodville, Thebarton, Adelaide CBDSouthbound exit and northbound entry only; southbound exit to, and northbound entry from, Grange Road/Manton Street
22.914.2Outer Harbor railway line
Hindmarsh–West Hindmarsh boundary23.914.9Grange Road (west) – Grange, Allenby Gardens
Manton Street (east) – Hindmarsh		Northbound exit and southbound entry only; northbound exit to, and southbound entry from, Port Road
24.115.0Hindmarsh AvenueNorthbound entry and exit only
South Road (A2) – Mile End, Edwardstown, St MarysSouthern terminus of motorway and route M2, route A2 continues south along South Road

See also

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icon Australian Roads portal

References

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Wikimedia Commons has media related to North-South Motorway, Adelaide.
  1. ^ a b c "North-South Motorway" (Map). Google Maps. Retrieved 29 June 2022.
  2. ^ a b c d Department of Planning, Transport and Infrastructure (13 March 2014). "Use the South Road Superway and save time: Northbound lanes to open on Thursday night" (PDF). Media Release. Government of South Australia. Archived from the original (PDF) on 7 May 2014. Retrieved 7 May 2014.
  3. ^ "Location SA Map viewer with regional layers". Government of South Australia. Retrieved 16 June 2022.
  4. ^ Australian Government (26 June 2010). "Nation Building - Economic Stimulus Plan". Archived from the original on 1 July 2010. Retrieved 26 June 2010.
  5. ^ a b "North–South Corridor: The 10 year Strategy" (PDF). Department of Planning, Transport and Infrastructure, Government of South Australia. May 2015. pp. 4–6. Archived from the original (PDF) on 21 March 2016. 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.
  6. ^ "Northern Connector". Infrastructure S.A. Archived from the original on 8 June 2010. Retrieved 12 June 2010.
  7. ^ "northern connector" (PDF). Infrastructure S.A. Archived from the original (PDF) on 15 October 2009. Retrieved 12 June 2010.
  8. ^ Schultz, Duane (13 August 2013). "Federal Government push to make $1.1bn Northern Connector South Australia's first toll road". News Review Messenger. Retrieved 5 July 2015.
  9. ^ "Northern Connector Project". Department of Planning, Transport and Infrastructure South Australia. Retrieved 14 September 2015.
  10. ^ Jean, Peter; Starick, Paul (14 September 2015). "Northern Connector Work to Start on Crucial $985 Million Adelaide Road Link". The Advertiser. News Corp. Retrieved 14 September 2015.
  11. ^ "Finally! New overpass at Waterloo corner has opened". Cruise 1323. 26 March 2019. Retrieved 27 March 2019.
  12. ^ "Port River Expressway weekend closure and detours, 24-27 May" (PDF). Northern Connector Project. Department of Planning, Transport and Infrastructure. May 2019. Retrieved 19 May 2019. This closure will allow for the demolition of the Craig Gilbert Bridge over PREXY as part of the construction of the Southern Interchange.
  13. ^ "New South Road Superway off-ramp opening" (PDF). North-South Corridor Northern Connector Project. 8 July 2019. Retrieved 23 July 2019.
  14. ^ Smith, Matt (3 March 2020). "Adelaide's biggest road project, the Northern Connector, set to open this weekend". The Advertiser. Retrieved 3 March 2020.
  15. ^ a b Novak, Lauren (31 May 2016). "Lendlease Engineering chosen to build and construct Northern Connector, work to start next month". The Advertiser. Retrieved 2 June 2016.
  16. ^ "Lendlease wins contract for Adelaide's Northern Connector". Construction Index. 2 June 2016. Retrieved 30 April 2022.
  17. ^ a b "Lendlease awarded $985m Northern Connector Project". Felix. 1 June 2016. Retrieved 30 April 2022.
  18. ^ Starick, Paul (16 November 2016). "$985 million Northern Connector to be South Australia's first major concrete road, creating more jobs". The Advertiser. News Corp (published 17 November 2016). Retrieved 17 November 2016.
  19. ^ Paul Fletcher, Federal Minister for Urban Infrastructure; Jay Weatherill, Premier of South Australia; Stephen Mullighan, SA Transport and Infrastructure Minister (6 December 2016). "Major construction begins on Northern Connector project" (PDF) (Press release). Retrieved 7 December 2016.{{cite press release}}: CS1 maint: multiple names: authors list (link)
  20. ^ a b "Northern Connector Project Breakfast". Industry Capability Network. 23 June 2016. Retrieved 7 December 2016.
  21. ^ "Notice to Assign a Names to Bridges and Shared-Use Path" (PDF). South Australian Government Gazette. Government of South Australia. 2 January 2020. p. 10. Retrieved 13 January 2020.
  22. ^ "Three contracts awarded on $885M Northern Connector". Trailer Magazine. 16 November 2017. Retrieved 18 November 2017.
  23. ^ Infrastructure SA (21 May 2010). "South Road Superway: Demography". Retrieved 26 June 2010.[permanent dead link‍]
  24. ^ Infrastructure SA (21 May 2010). "South Road Superway: Demography". Retrieved 26 June 2010.[permanent dead link‍]
  25. ^ Infrastructure SA (30 April 2010). "Project Overview: Demography". Retrieved 29 June 2010.[permanent dead link‍]
  26. ^ Infrastructure SA (30 April 2010). "Project official webpage". Archived from the original on 24 July 2010. Retrieved 29 June 2010.
  27. ^ Infrastructure SA (30 April 2010). "Project official webpage". Retrieved 2 February 2014.[permanent dead link‍]
  28. ^ "South Road Superway". Department of Planning, Transport and Infrastructure. 14 March 2014. Archived from the original on 4 July 2015. Retrieved 1 September 2014.
  29. ^ Wills, Daniel (15 May 2017). "South Rd upgrade: Construction to start between Regency Rd and Pym St". The Advertiser. Retrieved 28 February 2018.
  30. ^ "Regency Road to Pym Street". Department of Planning, Transport and Infrastructure. Retrieved 30 April 2018.
  31. ^ Tudge, Alan (5 July 2019). "Building Regency to Pym to begin this year" (PDF). Minister for Cities, Urban Infrastructure and Population (Press release). Government of South Australia. Department of Planning, Transport and Infrastructure. Retrieved 9 July 2019.
  32. ^ "Regency Road overpass open to traffic". R2P Alliance. 30 March 2021. Archived from the original on 14 May 2021.
  33. ^ Wingard, Corey (19 February 2021). "Regency to Pym project on the home stretch – finishing early and under budget" (Press release). Adelaide: Government of South Australia. Premier of South Australia. Archived from the original on 21 March 2021. Retrieved 21 March 2021.
  34. ^ "North-South Corridor: Torrens Road to River Torrens". Department of Planning, Transport and Infrastructure, Government of South Australia. 5 August 2015. 145594. Retrieved 8 August 2015.
  35. ^ "T2T". T2T Alliance. 31 July 2015. Retrieved 8 August 2015.
  36. ^ "Torrens Road to Torrens River Project Scope Extension". Department of Planning, Transport and Infrastructure. Retrieved 12 December 2015.
  37. ^ "Torrens to Torrens Part of South Road Upgrade to Open This Weekend". AdelaideNow. Retrieved 1 October 2018.
  38. ^ "TORRENS ROAD TO RIVER TORRENS LOWERED MOTORWAY TO OPEN TO TRAFFIC" (PDF). Government of South Australia. 28 September 2018.
  39. ^ "North-South Corridor open to traffic". RoadsOnline.com.au. 1 October 2018.
  40. ^ a b "North–South Corridor The 10 year Strategy" (PDF). Department of Planning, Transport and Infrastructure. May 2015. K-Net #9526649, V1. Archived from the original (PDF) on 21 March 2016. Retrieved 6 April 2016.
  41. ^ Smith, Matt (10 August 2018). "State Government puts the possibility of tunnels back on the table for North-South corridor". The Advertiser. Retrieved 3 September 2018.
  42. ^ "2020 Projects Pipeline Industry Briefing" (PDF). 4 August 2020. Archived (PDF) from the original on 30 August 2020. Retrieved 30 August 2020.
  43. ^ "$4.52 million contract awarded for North South Corridor". 22 July 2020. Archived from the original on 30 August 2020. Retrieved 30 August 2020.
  44. ^ "Budget 2020: The key measures". InDaily. 10 November 2020. Archived from the original on 10 November 2020.
  45. ^ "Final design for South Australian government's Torrens to Darlington road project released". ABC News. Australian Broadcasting Corporation. 28 November 2021. Archived from the original on 13 December 2021.
  46. ^ "T2D reference design released" (Press release). Adelaide, South Australia: Department for Infrastructure and Transport. 29 November 2021. Archived from the original on 13 December 2021. Retrieved 13 December 2021.
  47. ^ "Location SA Map viewer with LGA layers". Government of South Australia. Retrieved 16 June 2022.
  48. ^ "Location SA Map viewer with suburb layers". Government of South Australia. Retrieved 16 June 2022.
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