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"High speed train" redirects here. For an article about the High Speed Train, a diesel-powered train in the UK, see InterCity 125
High-speed rail is a type of passenger rail transport that operates significantly faster than the normal speed of rail traffic. Specific definitions include 200 km/h (125 mph) and faster — depending on whether the track is upgraded or new — by the European Union, and above 90 mph (145 km/h) by the United States Federal Railroad Administration, but there is no single standard, and lower speeds can be required by local constraints.