What is the correct use of a whistle or horn on the platform?

• A. To decorate the platform.
• B. To signal passengers to hurry along.
• C. To warn of approaching trains or hazards, following policy and sound patterns.
• D. To replace verbal announcements.

Answer: (C)

The main idea here is safety signaling. The whistle or horn on the platform is a warning tool used to alert people to an approaching train or a platform hazard, so they can stop, step back, or proceed with caution. It should be used according to official policy and the standard sound patterns so everyone interprets it the same way and responds appropriately. This consistency helps prevent accidents and keeps operations smooth.

It isn’t a decorative tool, and it isn’t meant to rush passengers or replace verbal announcements. Decorations do not convey safety information, and trying to hurry people can create unsafe crowding. Verbal announcements provide essential details like train numbers, destinations, and service changes, and must be shared in addition to any horn or whistle signals. The whistle/horn is a focused safety cue for immediate awareness of approaching trains or hazards, used only when a clear, policy-defined signal is necessary.