uses either AC or DC electric power fed directly to the train through either
an overhead wire catenary system or a surface-mounted third rail. Typically, high-speed systems
use high voltage AC overhead catenary systems. The advantage of electric power is that it can
provide very high peak power inputs, allowing for rapid acceleration rates and high maximum
speeds. All systems in operation with commercial speeds in excess of 150 mph use electric
power for this reason. The disadvantage is that the power transmission system is a large added
capital and maintenance expense. Examples include Amtrak’s Acela train, the French TGV
system, the German ICE system and the forerunner of them all, the Japanese Shinkansen, or
Bullet, train system.