Australia

Speed limits in Australia range from 40 km/h (25 mph) to 110 km/h (70 mph) at 10 km/h intervals. Generally:

* School zones are 40 km/h (25 mph) during school hours, except in South Australia, where they are 25 km/h (15 mph). This speed limit is also enforced in some shopping precincts.
* Suburban roads are 50 km/h (30 mph) in most states.
* Major suburban routes are 60 km/h (40 mph).
* Major connector roads and smaller highways are 80 km/h (50 mph).
* Highways and freeways are 100 km/h (65 mph).
* National highway routes are 100 or 110 km/h (65–70 mph).

Some states do not have 50 km/h zones, and those that do have only introduced them in recent years.

It is not uncommon to see 70 km/h and 90 km/h limits on some roads, where a higher limit is deemed too dangerous, yet a lower limit is unreasonable for the traffic.

The Northern Territory is an exception, as there is no speed limit on the highways.

Speed traps are used in almost all areas of the country. Tolerance is from 8% to 10% in most states but only 3 km/h in Victoria, an issue which has caused a lot of controversy.