Anyone who has sat in traffic during I-74 bridge construction knows how Iowans struggle with zipper merging. That was one of the findings in a survey by the folks at Kars4Kids according to a report published on Monday.

In a survey of driving habits in all 50 states, Iowa drivers received a failing grade of F when it came to allowing traffic to merge, and the use of turn signals. The grade for courtesy was a little better, resulting in an overall grade of D -- 41st on the list.

Illinois drivers scored better with a C average placing them 31st on the list. The biggest criticism of Land of Lincoln drivers was tailgating.

How accurate do you think these results are? Let us know in the comments.