Bullet trains are generally trains that travel above 250kmph. These speeds are quite fast for trains, but for safety reasons, there will be various conditions under which they will travel at slower speeds. Currently only 16 nations have high speed trains. Nations such as Japan, Spain, France, and Germany have specialized tracks dedicated to high speed trains. These countries have tracks that are more than 1,000kms long. Yet, China has the world’s longest network with about 27,000km of these tracks.
Bullet trains may run on conventional tracks, but these tracks are built with much stronger material. Such trains will have two synchronised engines with one on the front and one on the back. Most of the lines will be kept straight to allow for high speeds and when there are curves, they will travel at slower speeds for the purpose of safety.