Original sentence: High-speed rail is a type of passenger rail transport that operates significantly faster than the normal speed of rail traffic.Specific definitions include 200-300 km/h (125-185 mph) - 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.The current unofficial world speed record for a train of any type, 581 km/h (361 mph), was reached by the experimental Japanese JR-Maglev MLX01 magnetic levitation train.The world speed record for a conventional wheeled train was set by a French TGV that reached a speed of 574.8 km/h (357 mph) on April 3, 2007
Edited sentence: According to International Union of Railways, "high-speed train" is a train that runs at over 250 km/h on dedicated tracks, or over 200 km/h on upgraded conventional tracks.High-speed rail is generally defined as public transport by rail at speeds in excess of 200 km/h (125 mph), although defintions vary.Note that the current unofficial world speed record for a train of any type, 581 km/h (361 mph), was reached by the experimental Japanese JR-Maglev MLX01 magnetic levitation train.The International Union of Railways' high-speed task force provides definitions of high-speed rail travel.The US's Federal Railroad Administration appears to adopt a looser lower limit of 90mph [145 km/hr].The speeds at which a train must travel to qualify as 'high-speed' vary from country to country, ranging from 160 km/h (100 mph) to over 300 km/h (186 mph).The world speed record for a conventional wheeled train was set by a French TGV that reached a speed of 574.8 km/h (357 mph) on April 3rd 2007.There is no single definition of the term, but rather a combination of elements—new or upgraded track, rolling stock, operating practices—that lead to high-speed rail operations.Typically, high-speed trains travel at top service speeds of between 250 km/h and 300 km/h (155 mph and 186 mph)