I've travelled all over the country, and outside the country. I do it for a living, and have for over 15 years.
Believe me when I say, Michigan is the pothole capitol of the world! We even assign those ba$tards their own ZIP codes!
BTW....I think it's hilarious going to the southern states where they are fond of putting up signs that say "bump".............I end up a mile down the road thinking "where the hell was there a bump?"