Question 616 in the bank

When you are driving inside a tunnel which is marked with traffic sign 633:

A blue square with a white border, showing a white arched structure with brick-like lines around a black arched opening.
  1. Correct answer: You should turn on the front lights.
  2. You should turn on the fog lights.
  3. You are permitted to change lanes.
  4. You are permitted to overtake other vehicles.

Why this is the answer

The correct answer in the official bank: You should turn on the front lights.

Sign 633 marks a tunnel, and when driving inside it you must turn on the front lights, even by day. This lets you see the road better and be seen by other drivers, especially when passing from daylight into darkness. Fog lights are meant for poor visibility conditions and are not a substitute for the front lights.

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).