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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.
A 2003 survey of drivers for the Department for Transport found that 58% break speed limits on 30 mph roads and 25% break them by more than 5 mph. 57% break speed limits on motorways and 20% break them by more than 10 mph. [4] In 2002 the Select Committee on Transport stated that "Most drivers and pedestrians think speeds are generally too high ...
The 30 mph (48 km/h) speed limit in built-up areas was introduced in 1934 in response to high casualty levels. [21] The 70 mph (113 km/h) limit on previously unrestricted roads was introduced in 1965 following a number of serious motorway accidents in fog earlier the same year. [22]
The use of speed limits predates both motorized vehicles and enforcement of the laws. Facing the invention of the automobile, many nations enacted speed limit laws, and appropriate measures to enforce them. [4] The Locomotive Acts in the UK set speed limits for vehicles, and later codified enforcement methods. The first Locomotive Act, passed ...
Among the rules written into its charter, according the book “Ways of the World ” by M.G. Lay, was that all traffic had to stay to the right — just like the Conestoga wagons did.
In 1903, in the UK, the national speed limit was raised to 20 mph (32 km/h); however, as this was difficult to enforce due to the lack of speedometers, the 1930 "Road Traffic Act" abolished speed limits entirely. In 1934, a new limit of 30 mph (48 km/h) was imposed in urban centers, and in July 1967, a 70 mph (110 km/h) national speed limit was ...
The maximum speed for the Saturn V rocket was 25,000 mph. The maximum speed of a Bugatti Chiron (the fastest production road car) is 305 mph. The Mitubishi Mirage (the cheapest car available in ...
British roads are limited for most vehicles by the National Speed Limit.Road signs in the UK use imperial units, so speed limits are posted in miles per hour.Speed limits are the maximum speed at which certain drivers may legally drive on a road rather than a defined appropriate speed, and in some cases the nature of a road may dictate that one should drive significantly more slowly than the ...