Interlocking Limits
The tracks between the extreme opposing home signals of an interlocking.
Interlocking Signals ...
Block System A block or series of consecutive blocks within APB, ABS, ACS, CTC or interlocking limits. Blue Flag A blue flag or signal that is placed on a car or locomotive when workers are around or under it.
We proceed through the interlocking limits of State Line entering Indiana, swing towards the south on the L&N track and head to Hohman Avenue.
(CS) A circuited siding within CTC or interlocking limits in which both ends are controlled and governed by signals under the control of a Dispatcher or Operator.
Controlled Signal ...
A block or series of consecutive blocks within APB, ABS, ACS, CTC or interlocking limits.
A station stop usually does not have any other tracks than the main tracks, and no switches, although many exceptions exist where a station stop is within interlocking limits.
Halts ...
 See also: Point, Track, Block, Train, Section
  
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