Hmmm. "five digit number => tertiary" is a fun rule that's easy to implement and validate, but what are you expecting to achieve with it, other than theoretical correctness (which in carthography is useless, as you might have experienced).

I made it secondary, because of its heightened importance to transit traffic, as I wrote on the comment. So that routing engines prefer it when routing to e.g. Kloogaranna, and not fall back on local roads like 11193, 11410, 11412 etc.

And even visual inspection would send people on it — e.g. cyclist might look at this and prefer roads with less traffic to this one, that is marked as a national cycling route and - theoretically - should be the best to route on.

So, what would be the intention on changing it back?