i know you are working on another mod but just to update crossings still not working in mc 1.7.10 with latest forge.
That's because this mod has not been updated since it's last 1.7.2 version.
I didn't change anything between 1.6.4 and 1.7.2 by the way, it just broke because of the update.
I have a 1.7.10 version almost ready to go in which the crossings work again, but because I'm busy with school and work it may take a while before it rolls out.