@jon @saruwine Oh wow, I’ve always wondered about this! You both made my day.

@jon Good question (and I suppose then it is not just the southern boundary)…

(The Finnish road sign thing that I always get confused by is the ”yleisrajoitus” [general speed limit] annotation on 80 km/h signs on single carriageway roads when leaving slower areas. I mean, of course 80 km/h is the general speed limit, so why the extra annotation? If it were for foreigners, why is it only in Finnish/Swedish? I learned to drive in Finland so I remember learning about the sign you posted, but not about the ’yleisrajoitus’ annotation.)

@jon I think this marks the southern boundary of the area where reindeer flocks are tended: https://fi.wikipedia.org/wiki/Poronhoitoalue