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10 Cards in this Set
- Front
- Back
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A fixed signal at the entrance of a block that governs trains entering and using that block.
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Block Signal
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Employee Assigned to operate a CTC or interlocking control machine or authorized to grant track permits
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Control Operator
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The location of absolute signals controlled by a control operator.
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Control Point
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A siding within CTC or interlocking limits where a signal indication authorizes the siding's use.
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Controlled Siding
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Signal appliances that are interconnected so that each of their movements follows the other in a proper sequence. Interlockings may be operated manually or automatically.
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Interlocking
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The tracks between outer opposing absolute signals of an interlocking.
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Interlocking Limits
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A track extending through yards and between stations that must not be occupied without authority or protection
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Main Track
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A movement opposite the authorzied direction.
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Reverse Movement
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The apperance of a fixed or cab signal.
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Signal Aspect
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A notice of conditions affecting train movement. It may also authorize movement against the current of traffic where Rule 9.14
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Track Bulletin
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