What must a driver do when approaching a railroad crossing where the barriers are open?

Answer: B — Approach at a moderate speed and observe the tracks to the right and left

When approaching a railroad crossing where the barriers are open, it is essential for the driver to approach at a moderate speed while carefully observing the tracks to the right and left. This practice allows the driver to ensure that no trains are approaching, as trains can come at high speeds and may not always be easily visible from a distance. By approaching at a moderate speed, a driver is better able to react to any potential dangers, such as a train unexpectedly entering the crossing or the possibility of other vehicles or pedestrians nearby. Additionally, even when the barriers are open, it’s crucial to remain cautious, as the absence of warning signals does not guarantee that the track is clear. This approach emphasizes safe driving behavior and situational awareness at railroad crossings, which are often high-risk areas.