In this situation, do vehicles coming from the opposite direction have the right of way at the narrowed section of the roadway?

In the photo you are approaching a narrow passage under a flyover, where the roadway narrows to one lane; by the pillar on the right there are signs B-18 "no entry for vehicles with an actual total mass of more than 2.5 t", B-16 "no entry for vehicles more than 2.2 m high" and D-5 "priority on a narrowed section of the roadway", and on the other side you can see a car approaching. The vehicle coming from the opposite direction does not have right of way on this narrowing - you do. The answer is: no.

The Regulation on road signs and signals states that sign D-5 "priority on a narrowed section of the roadway" means that drivers drive or walk through before drivers approaching from the opposite direction; on the other side of the narrowing there is usually sign B-31, which prohibits entering the section if this would force those coming from your side to stop. On sign D-5 the white arrow is your direction, and the red one is the opposite direction, which waits. However, right of way does not free you from common sense: if the oncoming car has already entered under the flyover, you do not force your way in, but wait until it comes out, and when entering you check that your vehicle is within the 2.2 m height limit.

Legal basis: § 46 and § 25 and § 20 para. 2 and 4 of the Regulation on road signs and signals