What should a crew member do if the time limit shown on the track warrant expires?

When a time limit on a track warrant expires, the proper course of action for a crew member is to continue operating until they can establish communication with the train dispatcher. This ensures that the crew maintains safety and adherence to operational protocols during a critical situation. Contacting the dispatcher allows the crew to receive updated instructions or necessary extensions regarding their authority to proceed safely on the tracks.

Operating under expired authority without communication could lead to potential safety hazards, including unauthorized movement or conflict with other trains. Therefore, it is essential for the crew to prioritize contacting the dispatcher to clarify their position and confirm their operational status before making any further decisions or movements. This adherence to procedure helps maintain safety standards and effective communication within the rail operations.