Why do I hear a train horn?

I was at the bus stop around the corner when I heard a train horn. It was a warm morning. The nearest train track is about 15 miles away. It does get some trains, but I never hear them from my location. It sounded like a car or truck, but a bit "throaty". It was too deep for a car. It could have been a... show more I was at the bus stop around the corner when I heard a train horn. It was a warm morning. The nearest train track is about 15 miles away. It does get some trains, but I never hear them from my location. It sounded like a car or truck, but a bit "throaty". It was too deep for a car. It could have been a truck, but It didn t sound completely like a truck.Was it a ghost train? Or just a car or truck?
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