Miles per hour

Road traffic

Speed limits and road traffic speeds are given in miles per hour in the following jurisdictions:

• Antigua and Barbuda
• Bahamas^[1]
• Belize^[2]
• Dominica^[3]
• Grenada^[4]
• Liberia (occasionally)^[14]
• Marshall Islands
• Micronesia
• Palau
• Saint Kitts and Nevis^[15]
• Saint Lucia^[16]
• Saint Vincent and the Grenadines^[17]
• United Kingdom^[18]
• The following British Overseas Territories:
  • Anguilla^[19]
  • British Virgin Islands^[20][21]
  • British Indian Ocean Territory
  • Cayman Islands^[22]
  • Falkland Islands^[23]
  • Montserrat
  • Saint Helena, Ascension and Tristan da Cunha^[24]
  • Turks and Caicos Islands^[25]
• The Crown dependencies:
  • Bailiwick of Guernsey
  • Isle of Man
  • Jersey
• United States^[26]
• The following United States overseas dependencies:
  • American Samoa^[27]
  • Guam^[28]
  • Northern Mariana Islands^[29]
  • Puerto Rico
  • United States Virgin Islands^[30][31]

Rail networks

Miles per hour is the unit used on the US, Canadian and Irish rail systems.^[32][33][34] Miles per hour is also used on British rail systems, excluding trams, some light metro systems, the Channel Tunnel and High Speed 1.^[35]

Nautical and aeronautical usage

Nautical and aeronautical applications favour the knot as a common unit of speed. (One knot is one nautical mile per hour, with a nautical mile being exactly 1,852 metres or about 6,076 feet.)

Other usage

In some countries mph may be used to express the speed of delivery of a ball in sporting events such as cricket, tennis and baseball.