Lovely set! I dig the attention to details like different crossings and signals for different classes of track.
There seems to be a graphical glitch with crossings for class 2 and lower, though - bits of the crossing area seem to be set to the special color-cycle colors. Which I suppose is great if you let towns build level crossings and have road vehicles in the area, but a little distracting otherwise.

And the modern crossing gates have a similar (though maybe intentional) behavior - the crossing arms flash red even when they're up. (The "Toggle Level Crossing Graphics" parameter doesn't seem to do anything; your crossings are showing up even when they're turned off. I have not tried disabling the bonjour or stickbug parameters.

)