11.1 Establishing Absolute Block
Absolute block may be established in advance of a train. The train dispatcher can establish it verbally or by issuing a track bulletin addressed only to the train affected by stating, "Absolute block is established in advance of your train between ______________ and ______________"
11.2 Signal Indications with Absolute Block
When absolute block is established in advance of a train, the train must not pass a signal indicating Stop, Stop and Proceed, or Restricting unless verbally authorized by the train dispatcher. However, the train may leave the main track through a switch that is immediately after a signal indicating Stop and Proceed or Restricting.
When absolute block is established in advance of a train, the train dispatcher must not authorize the train to pass a signal indicating Stop, Stop and Proceed, or Restricting until the block governed by that signal is clear of trains.
If authorized to pass the signal, the train must proceed at restricted speed until it reaches the next governing signal.
11.3 Broken or Missing Seals
Do not break the seal on the cutout cock or cut out ACS or ATS devices unless they do not operate properly. Report ACS or ATS failures, interruptions, and removal of or missing seals to the train dispatcher immediately.
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