I stopped at an I-80 rest stop today and picked up an official Iowa State cycling routes map.
It is decently done, overall. I like how it lists the average traffic levels of the highways and blacktops. The map also highlights roadways which have a minimum 4' of paved shoulder accessible for bikes. Of course, there are lists of all the bike trails along with details on whether they are crushed stone, asphalt or concrete.
I live right on the Mississippi in Clinton Iowa, adjacent to Illinois and right below Wisconsin, so I hope to slip over and see what types of state support neighboring bicyclists are getting.
Any other states have cycling maps?