For the gates, I still need to finish the model and animate it (and then set up some nice generic crossings to use them). It'll probably be after the convention in October, though; they're good enough for my presentation so I likely won't spend more time on them until after the presentation is completed.
I haven't come across much info on those types of crossing gates, so if you come across any, feel free to shoot it my way!
I've been making a bunch of roads, also - I'll probably just do a big update all at once and spam the DLS like some of those catenary projects
2nd street crossing; ca 1920 or so: