Its a bit confusing as it only shows a single line for places that have multiple lines running on the same track
Also, trains disappear when they stop. Which is - uh - strange.
It's more pretty than practical. Trains marked with dots, arrows, or boxes would be far easier to read.
Personally, I think the stations themselves are a bit too dark and hide any train that's at the station once the trail disappear. But overall, I think this visualisation is beautiful.