How fast do trains usually travel?

It depends what country you are in. France has the fastest normal running service in the world at the moment at 300km/h (180mph) and this extends to the UK's St Pancreas International and other neighbours to France. The UK has trains that run at 200km/h on the main lines but it is possible to travel at 250km/h and the U.S is fairly undeveloped for train technology, the fastest trains run at 150km/h most of the time.