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Absolute Signal Blocking (ASB)

ASB excludes rail traffic from a defined portion of track for a specified period. The Protection Officer must correctly define the nominated worksite location.

The Signaller must identify all protecting signals and points to exclude rail traffic from the nominated worksite location.

The video below provides more details on how to implement ASB.

ASB - Requesting and Protecting ASB

ASB - Forms and communication

ASB - Alternative routes and adjacent lines

ASB - Nominating worksite locations in complex locations