South Australia

South Australia is distinctly divided into two main areas; the well watered and populated southeastern corner and the arid outback for the rest of the state. As a result, highways are concentrated mainly in the southeast. The Eyre Highway to Perth and Stuart Highway to Darwin are the only significant highways for the remaining part of the state. The remaining roads are outback tracks. This is the list of highways in South Australia.

• Adelaide-Crafers Highway (National Highway M1)
• Barossa Valley Highway (B19)
• Barrier Highway (A32)
• Dukes Highway (National Highway A8)
• Eyre Highway (National Highway A1)
• Flinders Highway (B100)
• Lincoln Highway (B100)
• Mallee Highway (B12)
• Port Wakefield Road (National Highway A1)
• Princes Highway (B1)
• Riddoch Highway (A66)
• South Eastern Freeway (National Highway M1)
• Stuart Highway (National Highway A87)
• Sturt Highway (National Highway A20)
• Tod Highway (B90)

Although not highways as such, unsealed outback tracks form important links to remote communities and areas, the significant ones include;

• Anne Beadell Highway
• Birdsville Track (C83)
• Oodnadatta Track
• Strzelecki Track

See also List of Australian highways