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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.

First major bridge installation

In a mammoth effort by all members of the project team, the Darlington Upgrade Project’s first major bridge installation has been successfully completed well ahead of schedule, with Main South Road and the Southern Expressway reopened to traffic by late Sunday morning (26 November, 2017) more than 21 hours ahead of schedule.

The 3000 tonne, 180 metre long bridge was manoeuvred into place over the weekend, and is the first of eight bridges to be installed for the project including two on Main South Road over the Southern Expressway to carry northbound traffic from Main South Road to the new lowered motorway and surface road.

Click here to see the image gallery

Click here to see the new bridge locations

The second major bridge installation will occur in 2018, with further information to be provided in advance of the date.

Major changes to traffic arrangements, Ayliffes Road, St Marys, February 2018

The Darlington Upgrade Project is being constructed in stages to ensure that traffic continues to flow efficiently through this important section of the North-South Corridor.

Last year, traffic on Main South Road between the Southern Expressway and Ayliffes Road was switched onto the newly constructed Main South Road surface roads.

Traffic on Ayliffes Road now needs to be switched to the edges of the roadway in order to allow for the construction of the new Ayliffes Road bridge

The Ayliffes Road traffic switch will occur between South Road and Norman Street, St Marys. and will come into effect on the weekend of 2-4 February 2018.

Click here for more information on the upcoming Ayliffes Road traffic switch.

Australian-first for Darlington Upgrade Project as local business benefits

Two new bridges for the Darlington Upgrade Project will be constructed ‘off-site’ and moved into position, in an Australian-first for a civil construction project of this scale.

Project consortium Gateway South has begun constructing the first of two 3000-tonne bridges which are part of the $620 million North-South Corridor project.

The 180m-long bridges are being built on land between the Southern Expressway and Main South Road, near Marion Road, over the next few months.

Once complete they will be transported using ‘self-propelled modular transporters’ and manoeuvred into place.

Construction of the bridge segments is providing work for local South Australian business Bowhill Engineering, which is fabricating 10 bridge segments at its River Murray workshop.

The first of the bridge segments will be delivered to the project site today, while the largest segment weighs 90 tonnes and measures approximately 40 metres long.

The innovative construction method will substantially reduce traffic impacts for the project.

Building these bridges off-site and moving them into position, will remove the need for multiple closures of parts of the Southern Expressway and Main South Road.

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