automatic block signal

noun

Definition of automatic block signal

: a railroad signal at the entrance of a block actuated automatically by and governing the movement of trains entering and using the block

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Learn More About automatic block signal

Dictionary Entries Near automatic block signal

automatic

automatic block signal

automatic coverage

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Cite this Entry

“Automatic block signal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/automatic%20block%20signal. Accessed 22 May. 2022.

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