Ø Flickering means vibration or unsteady illumination of any one aspect.
Bobbing means appearance and disappearance of different aspects of a signal ON
and OFF.
Ø When a LP comes across a Color Light signal which is Flickering/Bobbing,
he shall consider that the signal as showing the most restrictive aspect.
Ø Stop his train at the foot of the signal, If the signal assumes a steady
aspect and remains steady for 60 sec, observe the aspect and act accordingly.
Ø If the signal does not assume a
steady aspect and continue to Flicker/Bob, treat it as defective.
Ø In the case of Automatic stop signal showing more than one aspect, the
most restrictive aspect of the signal shall be observed.
