I don't disagree with much of what indy says. I'll add a few points, though. First, there are a number places, swathes of Kentucky, Missouri, and parts of Kansas, for instance, where the small towns the TA goes through apparently cannot support fresh produce being stocked at their grocery stores. (I don't worry much too much about residents there, there seem to be a lot of gardens in most of those areas.) It makes in difficult for a tourist with limited mobility, since most cyclists aren't inclined to ride 60-100 miles out of their way to find fresh, or sometimes even frozen, vegetables.
The second point is that when you see a bunch of cars gathering between 4:30 and 5:00 at country diner, it's often worthwhile to stop for supper there. It's probably the best eating place around. And while it may not be your top idea of great dining, when you join the locals at their favorite diner, you have a good chance of being able to strike up conversations that will be some of the most revealing about the locale, the residents, their concerns, thoughts, hopes, fears, and humor. To me, this is the most enlightening illustration of the country you are going through. My wife doesn't cycle, so while I can take her to the great national parks to experience the scenery, she'll have to rely on what I tell her about the residents of the areas in between.