What is the appropriate distance a school bus should keep from a railroad crossing?

Answer: C — At least 15 feet

The appropriate distance a school bus should maintain from a railroad crossing is at least 15 feet. This distance ensures that the bus is safely positioned away from the tracks, allowing for safe maneuvers and providing ample space for both the bus and any potential oncoming trains. When approaching a railroad crossing, it's crucial for bus drivers to be alert and cautious, as trains can come from either direction at high speeds. Maintaining this minimum distance not only helps keep passengers safe but also provides time and space to react if a train is approaching. In contrast, other distances listed may either not provide sufficient safety margins or exceed what is necessary for safe operation. Ultimately, the 15-foot guideline balances safety with practicality, which is essential for school bus operations in proximity to railroad crossings.