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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.
Some countries, for instance the US, India or China, do not have a specific urban road maximum speed. Different speed limits exist for heavy goods vehicles (HGV) but the limit for HGV is country dependent: while most Eurasian and American countries might use the Vienna convention's 3.5-tonne limit, other countries in North America, China, India ...
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.
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).
All countries, with the exception of the United States and the United Kingdom, use the metric system. Some countries mark this fact by using units on various signs. Brazil, Indonesia, Ireland, Mexico, Panama, Peru, and parts of Canada (British Columbia, parts of Ontario, and Yukon) list units (km/h) on their maximum speed limit.
This is an accepted version of this page This is the latest accepted revision, reviewed on 5 March 2025. Directionality of traffic flow by jurisdiction Countries by direction of road traffic, c. 2020 Left-hand traffic Right-hand traffic No data Left-hand traffic (LHT) and right-hand traffic (RHT) are the practices, in bidirectional traffic, of keeping to the left side or to the right side of ...
Swedish roads are divided into three classes; motorväg, which is a 4–8 lane motorway with a speed limit of 110–120 km/h (68–75 mph), riksväg, which is a state highway with 2–4 lanes and a speed limit of 70–100 km/h (43–62 mph), and länsväg, which is a "county route" with two lanes and a 70–90 km/h (43–56 mph) speed limit.
Speed limits on road traffic, as used in most countries, set the legal maximum speed at which vehicles may travel on a given stretch of road. [1] Speed limits are generally indicated on a traffic sign reflecting the maximum permitted speed, expressed as kilometres per hour (km/h) or miles per hour (mph) or both.