Australian Capital Territory Current Regulations Australian Capital Territory Current Regulations(1) The speed limit applying to a driver for a length of road to which a speed limit sign applies is the number of kilometres per hour indicated by the number on the sign.
(2) However, if the number on the speed limit sign is over 100 and the driver is driving a bus with a GVM over 5t, or another vehicle with a GVM over 12t, the speed limit applying to the driver for the length of road is 100km/h.
(3) A speed limit sign on a road applies to the length of road beginning at the sign and ending at the nearest of the following:
(a) a speed limit sign on the road with a different number on the sign;
(b) an end speed limit sign or speed derestriction sign on the road;
(c) if the road ends at a T-intersection or dead end—the end of the road.