In any case, if that is the point, it's better to say it that way, to talk about the distinction the article is making (like the sibling comment to the one I replied to) rather than saying "by definition" with some expectation that the conversation is being carried out with whatever precise set of definitions you've chosen.

The vague implication, that 2-lane state and federal highways shouldn't have driveways on them, is not and will not be the situation for the foreseeable future, so there's a pretty good case for using some nuance instead of insisting on some particular technical definition.