Whistle post

Whistle post with multiple crossings in Valdosta, Georgia

A whistle post (or whistle board), in railroad usage, is a sign marking a location where a locomotive engineer is required to sound the horn or whistle.

单词	Whistle post
释义	Whistle post 英语百科 Whistle post A whistle post (or whistle board), in railroad usage, is a sign marking a location where a locomotive engineer is required to sound the horn or whistle.
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