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There are 2,664 kilometres of risk-rated national highway in South Australia, which is 13 per cent of the total National Land Transport Network. During the period from 2010 to 2014, there were 799 casualty crashes on these roads, accounting for five per cent of the national total. These casualty crashes included 82 deaths, which equates to nine per cent of total fatalities across the network.
The following table lists the national highways in South Australia, with aggregated information provided.
The highest level of road trauma in the South Australian network occurred on Pt Augusta/Pt Wakefield Road, which accounts for 29 per cent of casualty crashes and 22 per cent of fatalities. The highest percentage of fatalities occurred on the Stuart Highway at 23 per cent. By contrast, the same highway recorded 13 per cent of casualty crashes, indicating that when crashes do occur, they tend to have severe outcomes.
The following table lists the worst 10 highway sections in South Australia, ranked from highest to lowest risk.
The following table lists the best 10 highway sections in South Australia, ranked from lowest to highest risk. When compared against the entire Australian network, eight of the 10 received a risk rating of low. Two received a risk-rating of low-medium. Further safety upgrades could help more of the South Australian network become low risk.