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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.
All main countries/regions, except for the United States and the United Kingdom, use the metric system. Some mark this fact by using units on various signs. Note that some smaller English-speaking countries in the Caribbean also use miles per hour. Advisory speed limit signs in most countries list units, although New Zealand does not.
Germany is the only country where some motorways do not have a maximum speed limit. The 130 km/h is sign-posted as a general advisory speed limit for motorways in the entry of the country. Due to those Autobahns , Germany is considered a country without a general speed limit on its highways. [ 2 ]
All European countries use the SI system (distances in kilometres or metres; speeds in kilometres per hour; heights, widths and lengths in metres; weights in tonnes) with the exception of the United Kingdom, where distances and speeds are still indicated in imperial measurements (miles or yards and miles per hour).
In the United States, the term statute mile formally refers to the survey mile, [3] but for most purposes, the difference of less than 1 ⁄ 8 inch (3.2 mm) between the survey mile and the international mile (1609.344 metres exactly) is insignificant—one international mile is 0.999 998 US survey miles—so statute mile can be used for either.
3. Bayer Aspirin. Though "aspirin" is a generic term today, in the early 20th century it was the patented brand name of a product sold by a German pharmaceutical company called Bayer.
The obsolete Finnish units of measurement consist mostly of a variety of units traditionally used in Finland that are similar to those that were traditionally used in other countries and are still used in the United Kingdom (imperial units) and the United States (United States customary units).
Meanwhile, in Ireland, its recent speed limit transition from miles per hour to kilometres per hour didn't take effect until 20 January 2005, although distance road signs had already been labelled in metric since the 1970s. [7] The US territory of Puerto Rico uses a mix – speed limits are in mph but distance signs are marked in km.