A Signalling SystemA series of electrical, electronic, electro-mechanical units brought together to form a system which controls the safe movement of trains. More used on a Single LineA generally Bi-Directional Line which is the only line that carries Running Movements. More and employing a single TokenAny Single Line Token, Staff or Tablet. More
(Train StaffA particular type of Token. More). If the driver does not take the train staffA particular type of Token. More through the section, a
written ticket is issued to authorise the movement.