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Darlington Upgrade Project

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Ayliffes Road: Darlington's largest bridge installation

8pm Friday 7 September - 6am Monday 10 September 2018


As part of the Darlington Upgrade Project, eight bridges are being constructed to improve connectivity and traffic flow in the area.

The Ayliffes Road Bridge is currently being constructed in the centre of Main South Road. This bridge will be located at the intersection of Ayliffes, South and Shepherds Hill Roads, and will carry northbound traffic from Main South Road.

For further information please click here.


Explore our interactive map to see what’s happening locally

Click or tap on the Project news panel and dots to see how the new roads and bridges are taking shape – and learn what this project means to our community. We will be adding more dots during the next few months, so keep exploring...

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First major bridge installation using SPMTs

As an Australian-first, the Darlington Upgrade Project’s first major bridge was successfully transported into place using “self-propelled modular transporters”. Installation was completed well ahead of schedule.

See more...


Flinders Drive bridge construction

The Flinders Drive bridge is being constructed using the “top down” method. Once construction is complete at road surface level, traffic will be switched onto the new bridge before excavation begins to create the lowered motorway. Learn more...

Cyclist and pedestrian access to be improved

Separated, two-way cycling paths and footpaths along both sides of the corridor, where space allows, will enhance linkages for pedestrians and cyclists accessing services, facilities and public transport as well as providing for cyclist commuters travelling through the area. Learn more...

Thank you event for local community

The Darlington Upgrade Project team hosted a community outdoor cinema event at Warriparinga Wetlands as a thank you to the local community and stakeholders for their patience during construction. Around 150 people enjoyed a free sausage sizzle, popcorn and fauna nesting box workshops before the movie kicked off at sundown.

Local business involved in Australian-first

South Australian business, Bowhill Engineering, fabricated 10 bridge segments at its River Murray workshop to be used as part of the bridges over the Southern Expressway. These bridges were transported into place using “self-propelled modular transporters”, an Australian first. Learn more...


Local students gain real life experience

After a close-up site tour, Pasadena High and TafeSA Civil Engineering students had the opportunity to hear from engineers and other members of the project team about becoming an engineer, innovation in the construction industry and what it’s like to work on a major infrastructure project.

Major bridge installation - Main South Road and Southern Expressway


Ayliffes Road Bridge installed


Schools building new habitats with project team

The Darlington upgrade project team has been working with the local community and schools building nesting boxes and creating habitat. More than 40 nesting boxes will be installed in nature reserves in and around the project area by the end of 2019.

Forbes and Brighton Primary Schools have dedicated their time in participating in environment and heritage workshops. Together with the project team, a zoologist and Kaurna Elders, the school’s Year 5 students spent a day learning about the importance of hollow bearing trees in our environment and our indigenous culture.

The environmental and heritage workshops promote supplementary initiatives to the traditional approach applied to engagement of environmental issues, and in particular vegetation and habitat impacts. The approach moves away from the sole reliance on offset planting for vegetation removal required for the upgrade of infrastructure, while offering the community an opportunity to get involved and help manage environmental impacts due to development works.

Nesting boxes can retain and support existing habitat in urban areas, while offset planting establishes new habitat. Instilling the skills, knowledge and resources within the community, particularly school education programs, promotes the retention and protection of urban habitats for many generations to come.

The Department of Planning Transport and Infrastructure and their contractors, delivering important upgrades to South Australia’s infrastructure, have been working in partnership with local governments and the community for many years and have built more than 200 nesting boxes over six council areas, being the Cities of Unley, Marion, Mitcham, Holdfast Bay, Light Regional and Playford.

We would like to thank the local community and our stakeholders for your patience and support during construction. As visitors in your community, we are mindful that this is your home and we appreciate your understanding while we work to deliver the Darlington Upgrade project for the wider community. Wherever possible we undertake activities that benefit and involve our local community members.


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 the second half of 2019.




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