I heart Iowa! This state has a reputation for being flat. Now, come on! Does this look flat to you? If it does than you've obviously never been to West Texas, Western Kansas, or Nebraska.
Judging by the driving displays I saw in Iowa, these (yes, I saw more than one) warnings are absolutely necessary.
This place just gets huger and huger:truckers' museum, barber shop, showers, laundry, movie theater(!), "family den" with large screen tv. You could live your whole life here and I think some people do. The only thing is, they have no Chipotle, so you'd have to go out once in a while.