If signaling devices or track circuits are inoperative, what must the crew do?

• A. Proceed using standard operating practices.
• B. Follow fixed instructions or obtain direct authorization from the dispatcher for normal movement.
• C. Stop and wait for maintenance indefinitely.
• D. Ignore and continue with caution.

Answer: (B)

When signaling devices or track circuits are inoperative, you lose the automatic protection those signals provide. The correct action is to move only under fixed instructions or with direct authorization from the dispatcher for normal movement. This ensures the movement is controlled and authorized even without signals, preventing conflicting or unsafe actions. Proceeding under standard operating practices, waiting indefinitely, or ignoring the situation would not comply with procedures and could create unsafe conditions.