The objectives of signalling are as follows.
(a) To regulate the movement of trains so that they run safely at maximum permissible speeds.
(b) To maintain a safe distance between trains that are running on the same line in the same direction.
(c) To ensure the safety of two or more trains that have to cross or approach each other.
(d) To provide facilities for safe and efficient shunting.
(e) To regulate the arrival and departure of trains from the station yard.
(f) To guide the trains to run at restricted speeds during the maintenance and repair of tracks.
(g) To ensure the safety of the train when it comes in contact with road traffic at level crossings.