One of the advantages of electric trains on the multiple control system is that they economize terminal accommodation, because they can be driven from either end indifferently, and therefore avoid the necessity for tracks by which engines can change from one end of the train to the other.
This perfection of distribution is practically attained in present-day practice by the multiple control system of operating an electric train, where motors are applied to a selected number of axles in the train, all of them being under the perfect control of the driver.
The National air Traffic Control System very recently crashed throwing air travel in to chaos.
The ACA assumes overall responsibility of the airspace control system in the airspace control system in the airspace control area.
Aerospace industry The modeling of closed loop control system in aircraft autopilots.