Best roadway sign ever: "Sign under construction".
I have two thoughts (one positive, one negative), and while I understand that it's still a work in progress, better to get these out while things are still in flux.
Act I, wherein I render praise: I like that the actual railroad forums appear near the top. I'm sure it looks better to a new visitor see that the railroad forums are near the top, with the Amtrak forum just peeking up "above the fold" on my laptop (1024x768 res.).
Act II, whereupon we find out hero mumbling quietly in the corner: I don't really like that the "Active Railroads" category (a misnomer, really) is immediately followed by the "Fallen Flags", with the "Short Lines & Industrials" behind that and "Commuter & Transit" in a distant third. For one thing, it breaks up all the active ones by including fallen flags in the middle, but mostly it pushes the second, third, and fourth busiest forums (NJT, LIRR, MBTA) further down. I'd suggest putting the "Commuter & Transit" category right after "Active Railroads", then then you're best judgment about whether "Fallen Flags" or "Short Lines & Industrials" comes next.
Overheard in NY Penn: "All aboard! Get on the train if you're coming with us!"