Jadis The Witch
I biked along Larsen Road yesterday, and have decided it should definitely be tertiary rather than residential. I think the key distinction that marks this decision is that "highway=residential" is described as being "not normally used as through routes". This roadway seems to very clearly be used as a through route from County Road MM to the much more significant concentration of homes along the west of Lake Waubesa. I saw half a dozen cars traveling along the road, and not one pull into a driveway.