How far must you stop from a railroad crossing when a train is approaching?

Answer: B — At least 15 feet

When a train is approaching, you must stop at least 15 feet from the railroad crossing. This distance is important for safety, as it provides a buffer zone that allows you to avoid being struck by the train, which can be extremely dangerous. The 15-foot rule is designed to give you enough space not only to see the train clearly but also to react appropriately. It helps ensure that drivers stop at a safe distance where they can clearly visualize oncoming trains and can safely wait until the tracks are clear before proceeding. Situational awareness at railroad crossings is essential, as trains can be very fast and may not always have warning signals. Stopping too close to the tracks could result in a tragic accident, so maintaining this minimum distance is a crucial aspect of safe driving near railroad crossings.