Question 504 in the bank

Which road sign informs about a change in the number of road lanes?

Four signs. 622: a blue square with one white arrow pointing up and a white line joining it from the left. 145: a red triangle with one arrow pointing down and one arrow pointing up. 109: a red triangle with two black lines curving inward. 111: a red triangle with one black line curving and the other straight.
  1. 145
  2. 111
  3. 109
  4. Correct answer: 622

Why this is the answer

The correct answer in the official bank: 622

Sign 622 is a blue square informative sign. The white arrow on it shows that one lane merges into another lane and the number of lanes changes. Signs 109 and 111 are triangular warning signs about the road itself narrowing, on both sides or on one side, and do not give notice about lanes. Sign 145 warns of two-way traffic. When the number of lanes changes, prepare in advance and merge carefully.

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).