RIS road signs

The RIS road signs are similar to North American, and some European style road signs, with a few differences. They are currently standardized under RIS 003-006. It replaced the former Baustralian Road Signals Standardization system. The system is imperial, except for speed limits, which are displayed in kilometres per hour, rather than miles per hour. It is intended to be compatible with multinational use, and thus all signs can be adapted for use with non-Baustralian route markers, codified in RIS 006.

Roads in Baustralia are to be signed in accordance with the RIS 003 to 006 books in order to be designated as Baustralian Highways.

The RIS defines national route shields such as Baustralia, which has a series of standard route marker colours to assist users in deciphering the route, and for quick identification of re-routings, etc. Beige and brown signs are used to avoid confusion between former Highway 19 and the current Highway 19, for example.