How Railroad Crossing Signals Work's primary photo
  • Distant Signal How Railroad Crossing Signals Work
  • TV Episode | 17 min | Documentary
Primary photo for How Railroad Crossing Signals Work

Distant Signal

How Railroad Crossing Signals Work
TV Episode | 17 min | Documentary
Over one hundred years ago railroad operators realized that a passing train could complete an electric circuit between its tracks and activate a crossing signal automatically. Since then motion detectors and speed predictors have been ...See moreOver one hundred years ago railroad operators realized that a passing train could complete an electric circuit between its tracks and activate a crossing signal automatically. Since then motion detectors and speed predictors have been introduced to. Here are some examples of crossing signals switches in action. Written by David Foss See less
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Edit Released
Updated Mar 26, 2021
Release date
Mar 26, 2021 (United States)

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Name Known for
Danny Harmon primary photo
Danny Harmon
Self Host Self Host   See fewer
Distant Signal (2007)
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