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A board marked W requiring the horn.
Also known as: Whistle board Indian Railways, Horn board India
The Indian Railways lineside board requiring a driver to sound the horn, placed before crossings and curves.
Requires a driver to sound the horn at the point the board is passed on Indian Railways.
Contexts: Public information
Is often paired with a second board for the crossing beyond it, so a driver may meet two requirements to sound within a short distance.
Contexts: Public information
A rectangular lineside board carrying a single large letter, mounted on a post beside the track.