SACOME chief executive officer Rebecca Knol said SA's road network covered about 10,000km.

She said the maintenance of those roads was critical for the safe and efficient supply of goods and services across the state.

The spend will partly address SA's road maintenance backlog, which had blown out from $723 million in 2017 to almost $2 billion in 2023, with many regional corridors in desperate need of repair.

Key infrastructure projects include improvements to regional highways and roads.

The Olympic Dam Highway will be repaired after being damaged in floods, with that project to cost about $75 million.

Knol said as the backbone of the state's economy, the growth of the resources sector was dependent on reliable supply chain routes.

"While regional and remote roads are primarily a safety, logistics and efficiency issue for the resource sector, they also impact a wide range of other sectors and communities including pastoralists, freight operators and tourists," she said.

"Our state's infrastructure is crucial for driving business, creating jobs and keeping SA connected [and] it is vital that the momentum of infrastructure and road maintenance funding is maintained to ensure the improved safety and reliability of supply chain routes for all industries."