We don't have this in Sweden because it's not an actual necessity. It's only a thing because your infrastructure is so damn bad.

Some cities allow trains to refrain from horns within city limits and instead the barrier makes a more localized dinging. I live near a major rail interchange and they rarely every honk their horns, oftenly only using a short warning horn if needed.

When I lived rurally trains with horns were far more common. On a human note I'd rather hear a train horn occasionally than hear constant traffic noise. I get how thats harder to manage with a dog but perhaps consistent training could lessen their response to horns.

You say that as if it's reasonable to have level grade crossings at all to begin with.

In other words, what you're complaining about isn't a problem with trains, but rather a problem with dipshit planners trying to cheap out and failing to properly fund trains.

Did your dog nearly shit themselves from a city tram?

That sounds more like a pet problem or a training issue than a transportation issue though.

Have you heard a freight train horn compared to a light rail horn? They're much quieter.

As for your situation, might I suggest instead pressuring the neighbors to help you apply for a permit for a "railroad quiet zone"? In my state at least that is a thing where a neighborhood can pressure a rail company via local government to have a designated corridor like this. The corridor will have any railroad crossings updated to have a "NO HORN" indicated signage since the train will not blast its horn on approach to the intersection, similar to this picture but my state also has requirements that the intersection will have speakers playing a sound indication that a train is approaching, and the train will have its bell ringing but no loud train horn. It's much quieter than the normal setup where they must per federal law lay on that horn multiple times as they come up on an intersection.

You just want to hate everything. Just don't bring your dog near train tracks then ffs.