The whole urban region is zone 30 (traffic sign start urban zone (F1, F1a, F1b) + maxspeed 30 (C43)). Only some of the roads are set with correct speed limit.

Large part of this road has a maxspeed of 100, while most of it is marked as 80

New zone 30 was added, unsure what is all inside it

Changes to zone 30 somewhere around here

This is probably now in zone 30, not sure to where it extends.

Max speed 30?

Part of a zone 30, roads are still marked as maxspeed=50

There were recent works here. The trajectory changed slightly.