My thinking when I read this was driving through Wisconsin on 2lane roads, typically on my motorcycle. Back then there were frequent rest stops. Places to pull off the road and pee (or more if that's the case). While Wisconsin is even still a pretty state to drive through; it was particularly nice then. Green hills and forests... Twisty turny roads. And roadside stops. Some with messages written on the walls. In fact, often with messages. That was part of my fun. And every so often an unexpected guy to get off with. More like pee and unload stops in that case.
Wisconsin highway department has largely eliminated those to fewer and farther apart. I know of only one southbound on I43. And nothing on the two lanes... Ditto going N to Green Bay, just the one stop on I43. Similar with I41 and I94. Easier for state police to patrol. And I am pretty certain monitored on cam now.
In today's scene, I don't know how play happens at those stops.