What is the purpose of the rear anti-fog lights of a passenger car?
Show the correct answer
Correct answer
C. They improve the visibility of the car in fog.
Explanation
In the photo a bright red lamp is shining in the lower part of the bumper - this is the rear fog light. It is much brighter than the sidelights (position lights) and it has one purpose: to make sure that the driver behind you can see your car in thick fog. The correct answer is C.
The fog light does not signal braking (A), because it shines all the time, not when you press the pedal; it also does not replace the sidelights (B), which must be on independently. The Road Traffic Act allows you to use rear fog lights only when visibility is reduced to less than 50 m, and requires you to switch them off as soon as visibility improves - otherwise you dazzle the drivers behind you.
Legal basis: Art. 30 para. 3 of the Road Traffic Act (Prawo o ruchu drogowym)