Engineer Training

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Front #255

ABTH 10.3

If one end of the limits of Track and Time is designated by a "Switch No," where does the authority end?

To the switch points
To the back of the signal on the other side of the switch
To the clearance point before the switch of the track for which the authority has been granted
To the signal governing movement over the switch

Back #255

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ABTH 10.3

Answer: To the signal governing movement over the switch

Feedback:
- Limits designated by a switch extend only to the signal governing movement over the switch, unless otherwise designated. - Track and Time does not have to use switches for limits but when it does, the signals become the reference points. - Switch Yes, you can be in the OS or on the switch; Switch No, the limits end at the signal before the switch; therefore, you cannot be on the switch or in the OS.