What action is required when seeing a Diverting Approach Sign?

Answer: B — Prepare to stop

When encountering a Diverting Approach Sign, the appropriate action is to prepare to stop. This sign indicates that a diverging route is ahead, meaning that trains need to reduce speed and be ready to halt if necessary, as their upcoming path may diverge from the main track or intersect with another track that could be at risk when a train or other railway vehicle is present. By following the procedure to prepare to stop, the crew ensures not only their own safety but also the safety of all passengers and other railway workers. This preparation is crucial for maintaining safe operations, particularly when navigating a potentially complex track layout. The other options may suggest inappropriate responses that could jeopardize safety, especially in a railway environment where careful adherence to signals and signs is vital for operational integrity.