South Australian Consolidated Regulations

AUSTRALIAN ROAD RULES - REG 109

109—What is a roundabout

A "roundabout" is an intersection:

            (a)         with either:

                  (i)         one or more marked lanes, all of which are for the use of vehicles travelling in the same direction around a central traffic island; or

                  (ii)         room for 1 or more lines of traffic travelling in the same direction around a central traffic island; and

            (b)         with or without a roundabout sign at each entrance.

Note 1—

"Intersection", "marked lane", "traffic" and "traffic island" are defined in the dictionary.

Note 2—

Rule 322  (3) and (4) deal with the meaning of a traffic sign at a place.

Roundabout sign