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Speed limits in Australia range from shared zones to . In the Northern Territory three highways have zones and two sections of the Stuart Highway are unlimited. Speed limit signage is in km/h since metrication on 1 July 1974. All speed limits (with the sole exception of the South Australian school and roadworks zones which are signposted at 25 km/h) are multiples of 10 km/h – the last digit in all speed signs is zero. ==Common limits== 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, , except for the Northern Territory which remains at * outside built-up areas, ; two exceptions are Western Australia and the Northern Territory at Common speed zones below the default built up area 50 km/h limit are: * Shared zones (signposted areas where pedestrians and motorised traffic share the same space) are . * School zones are variable speed zones, with a limit applying during gazetted school terms (which may include pupil-free days)〔http://smh.drive.com.au/schools-out-but-cameras-on-duty-20110716-1hj01.html〕 and at specific times of the day when children are expected to be present. In South Australia, the limit is . A minority of school zones have flashing lights to indicate when the lower speed limit applies. * 40 km/h zones. A number of local governments have implemented lower speed limits, typically 40 km/h, in certain areas, such as shopping precincts, or even in whole suburbs such as Balmain and Rozelle in Sydney. Common speed zones above the default limits are: * Many sub-arterial roads are zoned . * Major connector roads and smaller highways are zoned , , or . * Some highways and freeways are zoned . * Most of the Stuart, Arnhem, Barkly and Victoria highways in the Northern Territory are zoned . * A 200 km stretch of the Stuart between Alice Springs and Barrow Creek in the Northern Territory is zoned with no speed limit from February 2014.〔(【引用サイトリンク】accessdate=17 January 2014 )〕 The "END" speed limit sign is increasingly used throughout Australia to signal the end of a posted speed restriction, or built-up area "default" speed-limit leading to the jurisdiction's "rural" default speed limit. It contains the word "END" and a number in a black circle beneath this, representing the ceasing speed-limit. It is typically used where, according to AS1742.4 the road beyond has certain hazards such as hidden driveways, poor camber, soft edges and other hazards where the road authority feels a posted speed limit sign might be too dangerous or otherwise unwarranted. It is intended therefore to invoke particular caution. This sign is used as a direct replacement for the slash-through speed derestriction signs common in Europe and elsewhere. Speed limits are enforced in almost all areas of the country except for some areas of the Northern Territory. Tolerance is from 8% to 10% in most states but only 3 km/h in Victoria, an issue that has caused much controversy in that state, especially in light of the fact that previous Australian Design Rules specified that vehicle speedometers may have up to 10% leeway in accuracy. This was updated in 2006 to require that the "speed indicated shall not be less than the true speed"〔(Vehicle Standard (Australian Design Rule 18/03 – Instrumentation) 2006 )〕 Detection measures used are radar, LIDAR, fixed and mobile speed cameras (using various detection technologies), Vascar, pacing and aircraft. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Speed limits in Australia」の詳細全文を読む スポンサード リンク
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