Question 390 in the bank

When traffic sign 308 is placed at an entry to a section,of the road which traffic sign should be placed in the opposite side of that section?

Five numbered signs: 504, 622 and 308 blue squares with arrows; 145 red-bordered triangle with two arrows; 307 red-bordered circle with black and red arrows.
  1. 504
  2. 145
  3. Correct answer: 307
  4. 622

Why this is the answer

The correct answer in the official bank: 307

Sign 308 tells drivers they have priority over oncoming traffic on a narrow section. So at the other end of that section, sign 307 is placed, requiring drivers coming from the opposite direction to give way to oncoming traffic. The two signs work as a pair so each side knows who goes first. Sign 145 only warns of two-way traffic and does not set priority.

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