Upgrades to the Dukes Highway and across the North South Freight Route, between Murray Bridge and Annandale, will commence soon as part of a $145 million investment in road safety upgrades and infrastructure projects.
Funding from the joint government project will include targeted pavement treatments, shoulder sealing and safety enhancements on the Dukes Highway to improve safety measures.
There will also be work on Ridley and Halfway House roads on the freight route to allow for the removal of speed restrictions, enhancing the productivity.
Deputy Prime Minister Michael McCormack said the Federal Government had been working with the South Australian Government to get people and businesses back to work which would include a $52 million Regional Road Network Package to deliver road works to benefit the freight industry and regional communities.
"We will also fund a $12 million higher-capacity North-South Freight Route bypassing Adelaide," he said.
"This will deliver upgrades along the route between Murray Bridge and the Sturt Highway to remove speed restrictions and improve productivity, with initial works to get under way within six months."
State Transport Minister Stephan Knoll said investment in regional roads such as Long Valley Road, which links Strathalbyn and Mount Barker, would help save lives.
"Over the next four years we are upgrading over 1000 kilometres of country roads to improve safety and help save lives," Mr Knoll said.
"We are funding a suite of safety improvements across the state which will include fixing Long Valley Road through localised widening, shoulder sealing, intersection treatments, safety barriers and sight distance improvements. "In addition, we are also currently fixing over 300 kilometres of country roads across South Australia to support local construction jobs and improve road safety."
There is also 100 kilometres of the Ngarkat Highway, 100km of the Browns Well Highway, and around 12km of the South Eastern Freeway receiving upgrades.