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Inrail transport, awayside horn is an audible signal used atlevel crossings. They can be used in place of, or in addition to, thelocomotive's horn as the train approaches the crossing. They are often used in special railroad "quiet zones" in theUnited States, where theengineer is not required to sound the locomotive's horn at a crossing. This reduces the ambient noise at the crossing, which may be desirable in residential areas. Such railroad crossings may still require the traditional bells as part of the crossing signals in addition to the wayside horns.
One form is mounted on a pole at the crossing. The product is patented.[1]
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