Question 4550
When driving in especially unfavorable visibility conditions, is it mandatory to turn on the rear fog light?
- Yes, to indicate your position to other road users.
- No, it is only optional.
- Yes, and it is also mandatory to turn on the high beams.
Show answer and explanation
Correct answer: Yes, to indicate your position to other road users.
In dense fog, very heavy rain, heavy snowfall, or dense clouds of smoke or dust, the rear fog light is mandatory so drivers behind you can see you in time. This does not make high beams mandatory, and fog reflects their light back at you. In the image, the car ahead has its rear fog light on.