block signal

noun

a fixed railroad signal governing the movements of trains entering and using a given section of track.

Origin of block signal

First recorded in 1880–85

Related formsblock signaling, noun

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for block signal

Historical Examples of block signal

The passage of a law requiring the adoption of a block-signal system has been proposed to the Congress.
State of the Union Addresses of Theodore Roosevelt
Theodore Roosevelt
Why should he battle with the intricacies of a block-signal system when everybody else round the place has a separate bell?
Europe Revised
Irvin S. Cobb
But this time it falls harmless as one of Chauncey Depew's periodical four-track, block-signal presidential booms.
The Army Mule and Other War Sketches
Henry A. Castle