The kilometre per hour (SI symbol: km/h; non-SI abbreviations: kph, km/hr) is a unit of speed, expressing the number of See more

Although the metre was formally defined in 1799, the term "kilometres per hour" did not come into immediate use – the myriametre (10,000 metres) and myriametre per hour were preferred to kilometres and kilometres per hour. I… See more

The SI representations, classified as symbols, are "km/h", "km h " and "km·h ". Several other abbreviations of "kilometres per hour" have been used since the term was introduced and many are still in use today; for e… See more

During the early years of the motor car, each country developed its own system of road signs. In 1968 the Vienna Convention on Road Signs and Signals was drawn up under the auspices of the United Nations Economic … See more

• Orders of magnitude (speed)
• Speed limits in the United Kingdom
• Speed limits in Canada See more