I saw this in the RoadBikeRider Newsletter today:

Depressing News from Iowa

"Shared roadways are no longer safe or practical in today's society." So says a group seeking to have bicycles banned from most highways in Iowa, known for its wildly popular RAGBRAI cross-state ride...

I've heard about this issue before, but now there is a petition against this legislation:

Petition

If you would like to advocate for Iowa's cyclists, sign and share!