South Australian Numbered Regulations South Australian Numbered Regulations60—Meaning of rear overhang and rear overhang line
(1) The "rear overhang" of a vehicle is the distance between the rear of the vehicle and the rear overhang line of the vehicle.
(2) For a vehicle with an axle group at the rear consisting of only 1 axle, the "rear overhang line is a line running along the centre line of the axle.
(3) For a vehicle with an axle group at the rear consisting of 2 axles, 1 of which is fitted with twice the number of tyres as the other, the "rear overhang line" is a line running parallel to the axles that is—
(a) closer to the axle carrying the greater number of tyres than the line is to the other axle; and
(b) located at one-third of the distance between the 2 axles.
(4) For a vehicle with an axle group at the rear that is not an axle group mentioned in subrule (2) or (3), the rear overhang line is a line running parallel to the axles down the centre of the axle group.
(5) For the purposes of applying subrule (2), (3) or (4) to a vehicle, if an axle group includes at least 1 steerable axle, that axle is to be disregarded unless—
(a) the group consists of only 1 axle and that axle is a steerable axle; or
(b) all the axles in the group are steerable axles.
Examples of rear overhang line—
