What must a driver do when approaching a railroad crossing without a warning cross?

When approaching a railroad crossing without a warning cross, the driver has a responsibility to ensure their safety. The most appropriate action in this situation is to stop and check for trains. This is crucial because train tracks can be difficult to see, and trains often approach quickly and quietly.

The reason for stopping is to visually scan the tracks for any approaching trains, as well as to listen for any sounds that indicate a train might be coming. Safety protocols emphasize the importance of being vigilant and proactive in potentially dangerous situations like this.

While the option indicating the driver may proceed without stopping could seem plausible under certain circumstances like a clear view of the tracks, it does not prioritize safety enough in situations where it’s unclear if a train is coming or not. Similarly, simply slowing down and looking does not ensure adequate safety since it could lead to insufficient attention being paid to the tracks. Therefore, the best practice is to stop and check thoroughly before proceeding, aligning with the choices presented.