How far from a railroad crossing must a train signal its horn?

A train must signal its horn at least 1,500 feet from a railroad crossing. This distance is set to ensure that both motorists and pedestrians are adequately alerted of an approaching train, providing enough time for them to respond safely. The use of the horn serves as a warning to clear the tracks before the train approaches.

This regulation is crucial for safety because trains are unable to stop quickly, and being aware of their presence at a significant distance allows for better preparation and response from those near the crossing. The distance of 1,500 feet in particular helps emphasize the importance of being alert around railway crossings, highlighting the potential danger of trains operating on their own schedule, in contrast to vehicle traffic at intersections.