We've this roadsign which says "population center".
What it means is, the speed limit is 50 kph all over the place, until the roadsign which says "population center ends" shows up.
This is what it looks like.
And this is what the same sign looked like by one of the roads leading to Ruukki:
Pic: Population center sign. Wheee! I've found Batman's secret hideout! Although, Ruukki is a smallish rural village, not at all what Gotham City looks like in the comics ...
... of course, that makes it the perfect hideout.