Advance directional sign on Princes Hwy (NR1) at Millicent approaching Wyrie Rd & Williams Rd. July 2007. Image © Peter Renshaw

The black on white markers indicate highways around Australia which are not part of the National Highway System but are still of some national significance.

This page covers National 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.