I'll come back to this when I have more time, but for now:
> It is my understanding, by default in Michigan, as long as they are moving, people are allowed to walk on any roadway not designated as a freeway.

MCL 257.655 states " Where sidewalks are provided, a pedestrian shall not walk upon the main traveled portion of the highway. Where sidewalks are not provided, pedestrians shall, when practicable, walk on the left side of the highway facing traffic which passes nearest." with highway meaning any roadway