Hi-

It kind of undermines the distinction between trunk and primary if trunks can go nowhere. There's more or less nothing in the Keewenaw, and surely the downtown portion of US 45 in Ontonogan isn't a major route between significant cities?

Is the idea that all us routes must be trunk, or that if any piece of a route is trunk the whole thing must be?

It seems that some number of these are culvert crossings that had a layer=1 on the highway, for example osm.org/way/827126779 . I've just adjusted several in an area several miles on a side.