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