A “Draft Vision Document” for US 63 from Ottumwa to the Missouri state line is open for comment at the DOT website. It summarizes findings from meetings last year.
Much like the study of US 63 in Tama and Poweshiek counties, this study looks at turning the road into a Super-2 configuration. That includes adding passing/climbing lanes, something that southern Iowa needs on its roads more than northern Iowa does given the hilly nature of the area. US 63 already has some on the segment in question, but the distribution of them is part of the study.
The Amish community in the area is something else that makes this study a little different from others. Heavy buggy traffic affects planning for the shoulders and rumble strips.
The appendix says the study will be complete this winter but there is no timeline for improvements.