IDK my experience in 2017 wasn't so bad......I made it to Columbia MO and when it was over I had to get to Des Moines IA which involved a pretty rural road due north that wasn't that backed up......maybe 30 minutes right after the eclipse was over (I waited for the whole thing to be over).......after that initial back up it was 75 the whole way to Des Moines......probably had the advantage of not being on a major interstate like 91 or 89