What must a train operator do when approaching crosswalks in the yard?

When approaching crosswalks in the yard, a train operator must prioritize safety for both people and equipment. The requirement to stop and sound the whistle or horn serves to alert anyone who may be in the vicinity of the approaching train. This action is crucial in preventing accidents and ensuring that pedestrians, maintenance workers, or other personnel are aware of the train's presence. The sound of the whistle or horn is a well-established safety protocol that conveys a clear warning, allowing individuals to take appropriate action to avoid a potentially dangerous situation.

This response aligns with safety regulations that dictate proper behavior around crosswalks, as these areas are typically where pedestrian traffic is expected. Operating a train involves significant responsibility, and taking proactive steps to ensure awareness in these circumstances enhances safety for everyone involved.