Question 411 in the bank

What is the meaning of the following traffic sign?

A red-bordered white triangle with a thick black line rising from the bottom, curving first to the right and then to the left. Meaning: Bend to the right and then bend to the left.
  1. Winding road ahead.
  2. Narrow and winding road ahead.
  3. Correct answer: Bend to the right and then bend to the left.
  4. Hairpin curve ahead.

Why this is the answer

The correct answer in the official bank: Bend to the right and then bend to the left.

This is a triangular warning sign, and the black line shows the bends in the order you will meet them: first a bend to the right, then right after it a bend to the left. A winding road with more than two bends has a different sign. Slow down before the first bend and keep to the right.

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).