At what distance should an operator stop their vehicle when a railroad engine approaching a grade crossing emits a signal?

The correct distance to stop a vehicle when a railroad engine approaching a grade crossing emits a signal is 1500 feet. This distance is established to ensure safety for both the vehicle occupants and the train operators. At 1500 feet, drivers have ample time to respond to the train's signal and stop their vehicles well before reaching the tracks, reducing the risk of a collision. This guideline reflects the need for caution when dealing with large vehicles like trains, which have limited braking ability compared to cars. Stopping at this distance provides sufficient time for any unexpected circumstances and allows for safe passage across the railroad tracks once the train has passed.