If a signal aspect permitting a train to proceed changes to a Stop signal before it is reached, the train crew must:

If a signal aspect permitting a train to proceed changes to a Stop signal before it is reached, the train crew must:

• A. Stop using safe train handling techniques unless conditions require an emergency brake application.
• B. Report the signal change to the train dispatcher.
• C. Continue at the same speed until the next signal.
• D. Immediately stop and reverse.

Answer: (B)

When you’re approaching a signal that changes from allow to proceed to Stop before you reach it, you must report that change to the train dispatcher. This step brings the situation to the official authority responsible for track protection and movements. A signal could be malfunctioning, or another train might have altered the block status, so the dispatcher needs to be informed to issue the proper instructions or a new authority before you proceed. You should not assume it’s safe to continue, and you shouldn’t stop handling techniques or reverse without dispatcher guidance. Reporting the change ensures the movement remains protected and compliant with operating rules.

When you’re approaching a signal that changes from allow to proceed to Stop before you reach it, you must report that change to the train dispatcher. This step brings the situation to the official authority responsible for track protection and movements. A signal could be malfunctioning, or another train might have altered the block status, so the dispatcher needs to be informed to issue the proper instructions or a new authority before you proceed. You should not assume it’s safe to continue, and you shouldn’t stop handling techniques or reverse without dispatcher guidance. Reporting the change ensures the movement remains protected and compliant with operating rules.