block signal definition

  • noun:
    • A fixed signal during the entry to a railroad block, showing whether trains may enter.
    • An automatic sign put at one end of a section of a railroad to prevent the part by warning trains getting into it associated with presence in it of another train.
    • A fixed signal on entry to a railroad block, indicating whether trains may enter.
    • a computerized signal placed at one end of a section of a railroad to prevent the part by warning trains coming into it regarding the existence inside it of some other train.
  • others:
    • one of several risk signals or safety indicators which guide the action of trains in a block system. The sign is often therefore in conjunction with a switch that work of opening or closing the switch operates the sign in addition.
    • the danger indicators or safety indicators which guide the motion of trains in a block system. The signal is actually therefore coupled with a switch that act of orifice or closing the switch works the sign additionally.
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