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The road sign for a 30 km/h zone in Austria The road sign for a 20 mph zone in the UK. 30 km/h zones (30 kilometres per hour zones) and the similar 20 mph zones (20 miles per hour zones) are forms of speed management used across areas of urban roads in some jurisdictions. The nominal maximum speed limits in these zones are 30 kilometres per ...
In the UK Highway Code for England, Scotland and Northern Ireland, a built-up area is a settled area in which the speed limit of a road is automatically 30 mph (48 km/h). In Wales it's 20 mph (32 km/h). These roads are known as 'restricted roads' and are identified by the presence of street lights.
Research in 1998 showed that the reduction of some 30 mph (48 km/h) United Kingdom speed limits to 20 mph (32 km/h) had achieved only a 1 mph (1.6 km/h) drop in speeds and no discernible reduction in accidents; 20 mph (32 km/h) speed limit zones, which use self-enforcing traffic calming, achieved average speed reductions of 10 mph (16 km/h ...
The 2003 version of the MUTCD stated that "speed limits shown shall be in multiples of 10 km/h or 5 mph." [118] If a speed limit sign indicated km/h, the number was circumscribed and "km/h" was written below. Prior to 2003, metric speed limits were designated using the standard speed limit sign, usually with yellow supplemental "METRIC" and "km ...
The limit for "rural residential districts" and Class V highways outside the city or town compact is 35 mph (56 km/h). The limit for any "business or urban residence district" is 30 mph (48 km/h). School zones receive a 10 mph (16 km/h) reduction in the limit 45 minutes before and after the beginning and end of a school day. The speed limit for ...
The first 20 mph (32 km/h) speed limits for residential areas were introduced in 1991 [n 9] and then speed limiters for buses and coaches set at 65 mph (105 km/h) and also for HGVs set at 56 mph (90 km/h) in 1994. [n 10] It was made easier for local authorities to introduce a 20 mph (32 km/h) limit in 1999. [73]
Miles per hour (mph, m.p.h., MPH, or mi/h) is a British imperial and United States customary unit of speed expressing the number of miles travelled in one hour.It is used in the United Kingdom, the United States, and a number of smaller countries, most of which are UK or US territories, or have close historical ties with the UK or US.
New vehicles should be fitted with limiters as follows. Buses and coaches: 70 mph (113 km/h) [n 2] HGVs: 60 mph (97 km/h) [n 2] Mopeds: 30 mph (48 km/h) [n 3] Older vehicles still in use do not have limiters fitted or have them set at a higher speeds. [12] These devices do not enforce speed limits as they do not adapt to speed limit changes.