Question 407 in the bank

What is the meaning of the following traffic sign?

A red-bordered white triangle showing a black shape of two rounded bumps side by side at its base. Meaning: Uneven road surface
  1. Mountain road.
  2. Road-works ahead.
  3. Correct answer: Uneven road surface
  4. Speed bumps ahead.

Why this is the answer

The correct answer in the official bank: Uneven road surface

A red triangle showing two black bumps warns of an uneven road surface, with bumps and dips ahead. Slow down and keep a firm grip on the steering wheel to keep the vehicle stable. It should not be confused with speed bumps, which have a different sign, or with road-works, which are shown by a sign with a worker.

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).