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Darlington Upgrade Project

Darlington_image_headerArtist's Impression of Darlington Upgrade Project - view from south of Sturt Road, looking north.

The Darlington Upgrade Project is another important stage in the delivery of Adelaide’s North-South Corridor and will deliver an upgrade of approximately 3.3 kilometres of the existing Main South Road, including:

  • A non-stop motorway between the Southern Expressway and Tonsley Boulevard
  • A lowered, non-stop motorway passing underneath Flinders Drive, Sturt Road, Sutton Road/Mimosa Terrace and Tonsley Boulevard
  • Grade separation of the Main South Road/Ayliffes Road/Shepherds Hill Road intersection
  • Main South Road (at grade) service roads along both sides of the lowered motorway to provide connections to Flinders Drive, Sturt Road and most local roads
  • Full free flow interchange at the Southern Expressway/Main South Road with dedicated ramps providing direct access to the new motorway and Main South Road

The Marion Road/Sturt Road intersection has also been upgraded to cater for the redistribution of traffic during the construction period.


The $620 million project is jointly funded by Australian and State governments ($496 million federally funded and $124 million state funded).

Latest News

Major works contract award and scope extension

Gateway South, a Joint Venture of Fulton Hogan and Laing O’Rourke, have been awarded the major works contract for the $620 million project.

The design of the project has changed in a number of areas as a result of further design development, community feedback and the procurement process. A summary of the most significant changes is outlined below:

  • Extension of the non-stop motorway 1km further north along Main South Road, also grade separating the Ayliffes Road/Shepherds Hill Road and Tonsley Boulevard intersections.
  • Inclusion of a bridge between Sutton Road and Mimosa Terrace to provide enhanced east-west connectivity.
  • Inclusion of a right turn out of Brookside Road onto Main South Road for northbound motorists.
  • Removal of impact on Warriparinga - the project will no longer encroach into the Warriparinga area.
  • Realignment of the Flinders Drive extension to connect to Birch Crescent. The junction of Birch Crescent and Sturt Road will be signalised to enable safe traffic movements in and out of Clovelly Park. This will also provide enhanced connectivity for pedestrians and cyclists between Tonsley/Clovelly Park and the Flinders precinct through a dedicated path and bicycle path along the Flinders Drive extension.
  • Realignment of Sturt Road/Main South Road intersection to retain on-street parking in front of Sturt Road businesses and left turn into Maple Avenue. This will also ensure that the remnant vegetation immediately west of this building is not impacted.
  • Enhanced cycling and walking facilities through the provision of separated, two-way cycling paths and dedicated footpaths along both sides of the corridor.
  • Removal of the proposed new road connection from Flinders Drive through the Francis Street Reserve.

Click here to download a plan showing these changes.

The department is committed to ensuring that the Darlington Upgrade project provides for improved connectivity between Flinders University and Tonsley precincts within the existing project budget. Subsequently, the Minister for Planning is currently undertaking a Development Plan Amendment for the precinct to support the delivery of zoning improvements to enable integrated land use and transport outcomes as part of the Darlington Upgrade Project. This process aims to provide a planning policy framework that facilitates and unlocks existing locations within the Bedford Park area for targeted uplift, enabling the maximum range of land use opportunities to be considered.

View the concept drive through animation

Flinders Link

On 13 May 2016, the Australian and South Australian Governments announced funding for the $85 million Flinders Link Project. This project will include extending the existing Tonsley rail line to Flinders Medical Centre, creating new connections to the health precinct and Flinders University.

The project will include:

  • A 650 metre extension of the Tonsley rail line linking the Flinders Medical Centre and Flinders University to the rail network, including 520 metres of elevated single track over Sturt Road, Laffer’s Triangle and Main South Road
  • A new station next to the Flinders Medical Centre
  • An integrated shared pedestrian/cycle path adjacent the rail line
  • Station review.

Click here to download a plan showing these changes.

Artist's impression of the Darlington upgrade