Interlocking Signals
The fixed signals of an interlocking that govern trains using the interlocking limits.
Intermediate Carrier ...
Interlocking Limits The tracks between the outermost opposing interlocking signals of an interlocking. Interlocking Signal A fixed wayside signal governing movement through an interlocking.
Cab Signal A signal located in engineer's compartment or cab, indicating a condition affecting the movement of a train or engine and used in conjunction with interlocking signals and in conjunction with or in lieu of block signals.
Block signals space trains by warning of trains or cars on the track ahead. Interlocking signals control the movement of trains through complex trackwork (turnouts, passing sidings, crossings, crossovers, junctions, or drawbridges).
A signal that is located in the engine control compartment which indicate track occupancy or condition. The cab signal is used in conjunction with interlocking signals, and with or in lieu of block signals.
Cab Signaling ...
 See also: Track, Interlocking, Train, Block, Point
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