slide detector fence

noun

Definition of slide detector fence

: an electrically charged fence along a railroad track that when broken by a rock or earth slide automatically sets signals to halt trains from either direction until the obstruction is cleared

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“Slide detector fence.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/slide%20detector%20fence. Accessed 29 May. 2020.

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