The locomotive on 21 February 1804 in Wales was introduced by Trevithick. It achieved a speed of 8 km/h. In 1815, Englishman George Stephenson built the world's first workable steam locomotive. In 1825, he introduced the primary train which steamed along at 25 km/h (16 mph). Now a days trains can runs on the tracks at 500 km/h by not touching the tracks.