- block signal
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—block signaling.a fixed railroad signal governing the movements of trains entering and using a given section of track.[1880-85]
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Universalium. 2010.
block signal
Look at other dictionaries:
Block signal — (Railroads) One of the danger signals or safety signals which guide the movement of trains in a block system. The signal is often so coupled with a switch that act of opening or closing the switch operates the signal also. [Webster 1913 Suppl.] … The Collaborative International Dictionary of English
block signal — noun also block signal system : a fixed signal at the entrance of a block to govern railroad trains entering and using that block compare block system 2 * * * block signaling. a fixed railroad signal governing the movements of trains entering and … Useful english dictionary
block signal system — noun see block signal … Useful english dictionary
Automatic Block Signal — Basic Automatic Block Signals = Automatic Block Signal, or ABS, systems consist of a series of signals that govern blocks of track between the signals. The signals are automatically activated by the conditions of the block beyond the signal.… … Wikipedia
automatic block signal — noun : a railroad signal at the entrance of a block actuated automatically by and governing the movement of trains entering and using the block … Useful english dictionary
distant block signal — noun see distant signal … Useful english dictionary
Block (telecommunications) — In telecommunications a block is one of: * A group of bits or digits that is transmitted as a unit and that may be encoded for error control purposes. * A string of records, words, or characters, that for technical or logical purposes are treated … Wikipedia
Block Automatique Lumineux — Pour les articles homonymes, voir BAL. Signal permissif de BAL, sur la ligne du RE … Wikipédia en Français
Block Manuel — Pour les articles homonymes, voir BM. Signal lumineux en block manuel sur la ligne Grenoble Montmélian … Wikipédia en Français
Block automatique à permissivité restreinte — Signal d entrée de canton affichant la voie libre sur la ligne de Serquigny à Oissel. Le Block Automatique à Permissivité Restreinte, ou BAPR, est un système de sécurité ferroviaire utilisé sur les lignes à trafic moyen. Pour mémoire, les… … Wikipédia en Français
