There's so much hot garbage I found in those states when looking at the GRR (just one minor example).
That looks strange for how roads are now, but for travelers who went on US61 before the bypass was built they left the current highway at the * points around Fort Madison. Keeping up with new road construction on routes that you have not been near for years, it can be quite helpful. Depending on the construction changes and the maintainer, some areas end up with * points like this where the former route path separates from the current roadway or right of way, while others would just say the interchange was close enough. The pickier traveler would prefer having the * point, as it is a more accurate map of their travels.
