Question 605 in the bank

What is the meaning of the following traffic sign?

A blue rectangle with a white border, containing a white many-sided shape with a large blue number 1 in the centre. Meaning: The number of a freeway. (Motorway)
  1. The number of a regional road.
  2. The distance to the nearest roadway (in k.p.h).
  3. Correct answer: The number of a freeway. (Motorway)
  4. The distance to the nearest intersection (in k.p.h).

Why this is the answer

The correct answer in the official bank: The number of a freeway. (Motorway)

The sign shows a number inside a white shape on a blue background. This is how the number of a freeway is marked. The sign shows only a number, with no unit of measure such as km, so it does not show a distance to a road or to an intersection.

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).