I was driving home the other day from my weekly grocery shopping, and I noticed that a car a few vehicles ahead seemed to be carrying a big box on its hatch or something like that. Nothing terribly unusual; you see this kind of thing reasonably often, when people buy refrigerators or whatnot and decide to drive it home themselves rather than opt for delivery. But as other cars left and I got closer to this one, I realized that it was not a box, but rather a big mock-up of a coffee cup.
The car turned out to be a roving advertisement for Dunkin’ Donuts. I’ve never seen such a vehicle before. I grabbed a pic with my phone (unfortunately failing to allow for that damned telephone pole). Now they need to make a truck in the shape of a big donut!
Well, I'm a native Californian, so I'll say Pacific.
I once met a woman who lived in the Oscar Mayer Weinermobile (as an internship).