Railways uses blue-light indicators to warn passengers in Mumbai
He said the blue light, after the train is signalled to move, emits a beam on the platform warning the passengers not to board or alight when it starts moving.
The official said the beam of the blue-light falls at least three feet away on the platform ramp to warn the passengers to maintain safe distance to avoid accidents from an incoming or outgoing train.
The official pointed out that the decision was taken after Railway Minister Piyush Goyal, who is from Mumbai and has travelled a lot in the suburban railway network, expressed concern over fatalities involving passengers falling off running trains.
The official said the blue-light beam is being tested on one of the non-air conditioned Electrical Multiple Unit (EMU) train, which does not have the automatic doors like the air conditioned EMU and Metro trains.
According to railway ministry, local trains in Mumbai cover over 427.5 km network spread in two railway zones -- Central and Western Railways.