What action should be taken if there is doubt about who the signal was intended for?

• A. Continue at reduced speed
• B. Stop and await clarification
• C. Move with caution
• D. Movement must be stopped

Answer: (D)

When there's doubt about who a signal was intended for, the safe action is to stop. Signals regulate movement, and if you can't determine whether the signal applies to you or what it allows, you must not proceed. Bring the train to a complete stop at or before the signal and request clarification from the dispatcher or the appropriate authority before moving again. This prevents unauthorized movement or misinterpreting the signal. Continuing at reduced speed or moving with caution could still violate the signal and create a hazardous situation, so stopping is the correct first step, followed by obtaining explicit authorization.