In the visible situation, are you on a two-way single-carriageway with four traffic lanes?

In the photo you are driving on a foggy day along a straight road with one roadway, on which the lanes going in the same direction are separated by broken lines, and the two directions are separated by a double line in the middle; a silver car is coming from the opposite direction, and ahead of you there are a lorry and other cars. You are on a two-way single-carriageway road with four lanes. The answer is: yes.

The Road Traffic Act defines a lane as each of the longitudinal strips of a roadway that is wide enough for one line of multi-track vehicles, whether or not it is marked with road signs. The road is a single-carriageway road because both directions of traffic use one roadway, separated only by a line and not by a green strip or a barrier; the four lanes are two for your direction and two for the opposite one. The distinction matters in practice: the left lane in your direction is directly next to oncoming traffic, so after overtaking you return to the right lane, you do not cross the double line, and you remember that the rules for overtaking on the right are different on a one-way roadway and on a two-way roadway.

Legal basis: Art. 2 point 7 and Art. 24 para. 10 point 2 of the Road Traffic Act (Prawo o ruchu drogowym)