That really is very simple: because there can only be one option that's actually used. Set one standard in case of a tie, and in case people have no problem with it, easy. Really, this is just being overcomplicated. Just add it to threads where the people are fine with it, don't add it where people state they don't want it. If people in the thread (again, those who actually use the thread) can't come to an agreement, you add the Road to stuff yourself.
If the only other active Dutch user here would want this Road to stuff in the thread title, perfectly fine, then it's 1-1 and the tiebreaker decides so the title changes. If he's fine with how the title is now, like I am, we keep it like it is now because there's no need to change it. And yes, I do find it annoying that every thread title has this obligated habit of using capital letters where it's 100% unnecessary, but I've put that in the back of my mind and am ignoring it rather than complaining about it
Main point (at least for me): "Netherlands National Thread" is perfectly fine, keep it. If the other active Dutch user agrees with your standard and wants that, change it. If not, keep it. Easy.