Richard Trevithick, a British inventor and mining engineer developed the first high-pressure steam engine as well as the first full-scale working railway steam locomotive in the early 19th century.
Trevithick built a full-size steam road locomotive in West Cornwall which he named the 'Puffing Devil,' and it is widely recognized as the first demonstration of transportation powered by steam. It successfully carried six passengers to the next nearby village traveling at a speed of 8 km/h (5mph). But as more tests were made Trevithick's locomotive broke down three days later after passing over a gully in the road. The 'Puffing Devil' could not maintain sufficient steam pressure for long periods and would have been of little practical use.
In 1803 the inventor designed and built another steam-powered road vehicle called the London Steam Carriage. This became the world's first self-propelled passenger-carrying vehicle and attracted a lot of public and press attention when he drove it that year in London from Holborn to Paddington and back. However, it was uncomfortable for passengers and proved more expensive to run than a horse-drawn carriage; the idea was later abandoned.