HUBBALLI: Trains blowing their horns at night have become a nightmare for residents who stay adjacent to the track on the 20km stretch between Hubballi and... read full article... Residents fume at trains needlessly blowing horns
If 1 or 2 LPs does this, you can consider as not necessary. But if all LPs does, then certainly it's a rule by railways. You cant complain to the safety standards adopted by IR.
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