Alright then, I guess I'll restore their old classifications. The only thing I now have against that decision is this: I read somewhere (I think on the wiki) that motorways should not share nodes with other non-motorway (link)s, as that would generate an error. I figured that they should also share nodes with other highways only if they are tagged as an expressway. The original setup has a motorway ending without transitioning into an expressway first, which, it appears, occurs between the interchange at NV 173 and the intersection at Veterans Memorial Drive. Where should this expressway segment be?