en-block signaling
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block signal — block signaling. a fixed railroad signal governing the movements of trains entering and using a given section of track. [1880 85] * * * … Universalium
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 — blockable, adj. /blok/, n. 1. a solid mass of wood, stone, etc., usually with one or more flat or approximately flat faces. 2. a hollow masonry building unit of cement, terra cotta, etc.: a wall made of concrete blocks. 3. one of a set of cube… … Universalium
block — [[t]blɒk[/t]] n. 1) bui a solid mass of wood, stone, etc., usu. with one or more flat or approximately flat faces 2) bui a hollow masonry building unit of cement, terra cotta, etc 3) one of a set of cube shaped pieces used as a child s toy in… … From formal English to slang
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
North American railway signaling — For the actual physical signals, see North American railroad signals. Standards for North American railway signaling in the United States are issued by the Association of American Railroads (AAR), which is a trade association of the railroads of… … Wikipedia
Moving block — In railway signaling, a moving block is a signaling block system where the blocks are in real time defined by computers as safe zones around each train. This requires both the need to know the exact location and speed of all trains at any given… … Wikipedia
Washington Metro signaling and operation — Red signal ahead of Silver Spring pocket track on the B Route. Signaling and operation on the Washington Metro system involves train control, station identification, train signaling, signage, and train length. As with any working railroad,… … Wikipedia
Signalling block system — Signalling block systems enable the safe and efficient operation of railways, so as to avoid collisions between trains. Block systems are used to control trains between stations and yards, and not normally within them. Any block system is defined … Wikipedia
Nodal signaling — is a signal transduction pathway that is important in pattern formation and differentiation during embryo development.[1] The nodal family of proteins, a subset of the transforming growth factor beta (TGFβ) superfamily, is responsible for… … Wikipedia
66 block — A 66 block (also M Block) is a type of punchdown block used to connect sets of wires in a telephone system. 66 blocks are designed to terminate 22 through 26 AWG solid copper wire. The 25 pair standard non split 66 Block contains 50 rows; each… … Wikipedia
