Question 176 in the bank

Which of the roads in the following illustration is a one-way road?

T-junction: vertical road with lanes 1 and 2 split by a dashed white line, blue square sign with white upward arrow at each corner labelled A; cross road labelled B right, C left.
  1. Street A and street C.
  2. Street B and street C.
  3. Only street C.
  4. Correct answer: Street A.

Why this is the answer

The correct answer in the official bank: Street A.

At the entrance to street A, blue signs with a white arrow are placed on both sides. They mark a one-way road, where traffic is allowed in the direction of the arrow. Both lanes on this street are for the same direction. Streets B and C have no such sign, so traffic on them is two-way.

Topic: Rules and regulations. The bank marks it for these classes: Light truck (C1), Heavy truck (C), Bus (D), Motorcycle (A), Tractor (1), Private car (B).