Photo of a sign on an alphanumeric route

Advance directional signs on Greenhill Road (A21) in Adelaide, approaching the intersection with Fullarton Road. Image © Darrin Smith

South Australia has several roads that are numbered using alphanumeric designation to indicate the importance and / or the standard of the route. This system was introduced in 1998. 1

This page covers Alphanumeric Routes located across South Australia that have had their route numbers decommissioned.

To view each gallery, click or tap on a route number or preview image below.

1 SA Government, Department for Infrastructure and Transport