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Darlington Upgrade Project

Darlington Concept Image 1



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) surface 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 $620 million project is jointly funded by Australian and State governments ($496 million federally funded and $124 million state funded). It is due to be completed in 2019.



Sturt Road bridge takes shape!

A significant milestone was reached on the weekend for the Darlington Upgrade Project, with the installation of concrete beams for the new Sturt Road bridge.

The beams, each weighing approximately 75 tonnes, form the support for the bridge deck and were lifted in over a 48 hour period.

This Sturt Road bridge is one of eight bridges being constructed as part of the project and is being built using the traditional top- down construction method.

This involves the bridge piers, supporting deck, road pavement, railings and shared use paths being built at the current road surface level.  Once construction of the structure is complete and traffic is moved onto the new bridge, the soil underneath the bridge structure is then excavated in preparation for construction of the lowered motorway. Traffic is maintained at all times during construction by adjusting the alignment of traffic and paths around the main construction zone.

This method is being used for the Flinders Drive, Sturt Road, Sutton Road/Mimosa Terrace, Ayliffes Road (southern section) and Tonsley Boulevard bridges and we have produced a short video showing how this construction process works.


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.

Click here to go to the Flinders Link website