What must be done with train specific TGBOs when a train has cleared the limits or ties up at the end of a shift?

When a train has cleared the limits or ties up at the end of a shift, the proper course of action is to report to the dispatcher and release the Train General Bulletin Order (TGBO). This ensures that the information related to that specific train is formally acknowledged and removed from active status, allowing the dispatcher to maintain an accurate and updated record of train movements and operations on the line. By doing so, it enhances safety and communication among train crews and dispatchers, prevents confusion with future operations, and helps facilitate an efficient workflow.

The other options do not align with the proper protocol of handling TGBOs. Simply shredding the TGBO does not provide a record of the train's status or communicate critical information to the dispatcher. Filing for future reference does not address the current operational status, and handing it over to the next crew could lead to misunderstandings, as the TGBO pertains only to the train that has cleared the limits.