defective working of signals

malfunction

operating fault [ malfunction ]

faulty operation | improper operation

digital pattern generator operating | RF signal generator operating | function generator operating | operate signal generator

(2) If such controls are automatically operated, circuits shall be so designed or train speed restricted as to ensure the required operating time of signals when the train again proceeds towards the crossing.

14 (1) Cut-out controls may be required to minimize unnecessary operation of the signals when trains make regular operating stops or perform switching operations within the operating circuits.

12 (1) Signals shall operate for not less than 20 seconds before the crossing is entered by a train at a speed in excess of 10 m.p.h.; provided that where the distance as measured parallel to the centre line of the highway between the governing signal and clearance on the opposite side of the farthest protected track on which trains operate in excess of 10 m.p.h. is more than 35 feet, the operation time of 20 seconds shall be increased one second for each additional 10 feet or fraction thereof; signals shall continue to operate until the train has cleared the crossing.

We know that in the U.S. presidential elections in 2000 confusion was caused in Florida when voting machines were found not to be operating properly.