Reason for stopping for a period of time: Ordinary trains stop midway to make way for the high-speed train behind them to ensure the punctuality of high-speed trains; high-end cars have greater authority and need to make way for low-end cars; late trains need to be on time trains Give way and ensure the normal operation of vehicles. A train is a means of transportation that runs on railway tracks, usually consisting of several carriages. It is one of the most important means of transportation in modern times. Trains are a typical example of mankind's use of fossil energy for transportation. In 1804, British mining technician Drivesk used Watt's steam engine to build the world's first steam locomotive with a speed of 5 to 6 kilometers per hour. At that time, because coal or firewood was used as fuel, people called it "train", and it is still used today. On February 22, 1840, the world's first train was designed by Charles Livethick, an engineer in Canva. Early traditional trains consisted of one to three locomotives pulling several carriages or freight cars. However, in modern new trains, there have been EMU trains with multiple carriages with their own power.