South Australian roads will receive a record $1.115-billion injection of funding from the state and federal governments, with $179.8-million of new funding promised from the state government.
The state government will fund $6.4 million of the $32 million announced to upgrade the region's roads following the closure of the rail corridor and $200,000 toward a $1-million project to open Bratten Bridge to road trains.
At the top of the Eyre Peninsula sections of the Eyre Highway, from Port Augusta to Border Village, will receive a $18.6-million boost from the state government.
Premier Steven Marshall said the road toll in 2019 was "unacceptably high" and improving the condition of regional roads was one way to help reduce the figure.
"This senseless loss of life on our roads simply has to stop," he said.
"This is the single biggest investment in regional roads in South Australia's history, and a true reflection of the value we place on our regions and saving lives on our roads.
"Our commitment, pure and simple, is focused on building productive infrastructure that facilitates growth, productivity and job creation in our regions so that our farmers and entire state can flourish."
Over the next eight years the state government will give $28.6 million to fund regional road upgrades across the state including overtaking lanes and shoulder sealing.
The RAA lobbied for an urgent increase in rural road maintenance and upgrades before the announcement and welcomed the new funding commitment by the state government.
RAA senior manager for road safety Charles Mountain said the additional state funding would ensure projects across the state could be delivered.
"With the closure of the rail grain service on Eyre Peninsula, the need to upgrade the roads that are going to be subject to increased grain movements is essential and must be commenced as soon as possible," he said.
"The investment in overtaking lanes and shoulder sealing is welcomed because these measures significantly improve safety, by providing safe overtaking opportunities and reducing the risk of run-off road crashes due to crumbling road edges."
Primary Producers SA (PPSA) also welcomed the new funding and chairman Rob Kerin said it would improve road safety and efficiency across the rural transport network.
"We see this as an investment in the future growth and development of primary production in South Australia because efficient transport infrastructure and freight corridors are integral to operating productive and profitable farming businesses," he said.