Question 395 in the bank

Which of the following road signs prohibits vehicles to make a left-turn into a gas station?

Four round signs: 428 and 429 show black arrows bending right and left with red slashes; 205 blue with white left arrow; 431 U-shaped arrow with red slash.
  1. 431
  2. 428
  3. 205
  4. Correct answer: 429

Why this is the answer

The correct answer in the official bank: 429

Sign 429 prohibits a left turn, so after it you also may not turn left into a gas station. Sign 428 prohibits a right turn, and sign 431 prohibits a U-turn. The blue sign 205 does not prohibit anything. It requires you to drive in the direction of the arrow, which here is left.

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).