Bullet Train

                  A streamlined body: To achieve speeds of 320 kilometers per hour (200 miles per hour) and more, the trains needed to be as aerodynamic (to cause as little wind resistance) as possible. That is why the front cars of the Shinkansen trains are tapered like the nose of an airplane.

                  Minimizing vibration: When trains reach high speeds, the wheels vibrate on the rails. If this vibration reaches the passenger compartments, it can make them fall apart. To prevent this, the passenger compartments ride on top of flatcars. These are fitted with an air spring that uses compressed air to absorb the wheel vibration so that it does not reach the passenger compartments
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                 Modern tracks: Until the Shinkansen was built, Japan did not have the wide-gauge (1,435 millimeters wide) railway tracks that were the standard in the rest of the world. Instead, Japanese trains ran on narrow-gauge tracks (1,067 millimeters wide). Most people felt that wide-gauge railway tracks were necessary to move large numbers of people and large volumes of goods, so wide-gauge tracks were built for the Shinkansen. And to allow the trains to go as fast as possible, Shinkansen tracks have no sharp curves. Also, Shinkansen tracks never cross other railway lines on the same level, so the trains never have to stop and wait for other trains to pass.