Is there such thing as train horn polution?

Other answer:

Yes there is. A lot of towns and cities have a bylaw that prohibits the railways from using the horn at level crossings that is protected by lights and or gates. I remember areas where our train would pass at night close to many homes and the Engineer would use the horn very lightly so as not to disturb people sleeping, especially where the approach to the crossing can be seen by the Engineer to be clear of cars.
Wolf Harper:
Noise pollution is caused by homeowners who carelessly buy houses without the due diligence of noticing that it is next to railroad tracks that were there for 100 years.

Because it's not a secret that trains blow their horn at crossings.

And like a tree falling in the forest, it s not a problem unless someone is there to hear it.

Orange Bear:
It would be under noise pollution, so technically yes. Some cities have no horn crossings because of noise pollution laws. But trains aren't alone, older jet aircraft have to be fitted with hush kits to fly into many areas. Walls next to highways are for the same reason.
Only if you live close to a grade crossing where they sound the horn for a mile before and a mile after. They just get tired of cars trying to beat the train and losing therefore the long horn play.
No… they always got the right of way. Better than car splatter for the next few miles, because a train does not bounce away in a collision(which is what happens when 2 cars collide, there is a bounce away) Car vs train= grind away for the train does not stop.
If you don't like it you can always MOVE.