Australian states and territories use two "default" speed limits. These apply automatically in the absence of 'posted' speed restriction signage. The two default speed limits are:
? within built-up areas, 50 km/h (30 mph)
? outside built-up areas, 100 km/h (65 mph). Two exceptions are Western Australia and the Northern Territory (NT) at 110 km/h (70 mph).
? school zones, 40 km/h (25 mph)