I just got the new Roadfood book; Jane and Michael Stern's guide to the kind of restaurants that are now called "Roadfood" places. It's a list of places that actually serve good American food, particularly regional specialties, mixed in with more kitschy entries. In other words, a lot of places that seem they ought to serve great regional food, don't, but still have som ekind of throwback to another way of doing things, great mottos or signs, fun gimmicks or servers. My last trip (Tennessee and Virginia) following Roadfood was disappointing but I have had some wonderful experiences other times.
You can judge by what they choose in Cincinnati. I don't have the old one here, so I can't tell completely for sure which are new, and which have been dropped. But Putz's is still in, and Camp Washington Chili and Blue Ash Chili. They've also added Hathaway's, though I think they visited before the new owner/decor. As the long as the waitresses stay, I think it qualifies. I think this is new: my favorite ever rootbeer stand The White Turkey in Conneaut.