On a road designated in this manner, does an individual using a mobility aid have priority over vehicles?

Sign D-40 marks a residential area. A person using a mobility aid - rollerblades, roller skates, a skateboard or a scooter without a motor - has the right to use the full width of the road in this zone and has right of way over vehicles. The answer is: yes.

The Road Traffic Act states that a person using a mobility aid normally uses a footway, a shared footway and cycle path or a cycle path, but in a residential area uses the full width of the road and has right of way over vehicles. With pedestrians it is the other way round: in the zone, a pedestrian has right of way over a person using such a device. So as a driver, you treat a rollerblader in a residential area like a pedestrian: you slow down to 20 km/h and give way.

Legal basis: Art. 15a para. 2 and Art. 11 para. 5 of the Road Traffic Act (Prawo o ruchu drogowym); § 58 para. 1 of the Regulation on road signs and signals