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.
Transport and Infrastructure Minister Stephen Mullighan spoke of the unique benefits to come from the construction process.
"This project will make the journey quicker and safer for almost 100,000 vehicles using the Main South Road and Sturt Road intersection every day, including the 73,000 vehicles using this part of Main South Road.
"Building the bridges in this way means keeping disruptions to a minimum during construction for the many tens of thousands of vehicles which travel through this part of Main South Road every day.
"While this type of bridge installation is common in Europe and America, this method has never been used on this scale before in Australia.
"These new bridges will improve traffic flow at some of Adelaide’s top ten busiest intersections and will reduce travel times for drivers travelling both north-south and east-west."
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 shortly, 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. Construction of the 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.
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