What it means
Warning: Expect smoke, fog, or dust ahead. Switch on your headlights and slow down to improve safety.
What to do
- Switch on your headlamps, not just parking lights.
- Slow down and increase your following distance.
- Do not stop on the roadway; if you must stop, get fully clear of it.
In the K53 test
Fog and smoke questions want headlamps on plus more space. Hazard lights while moving is the wrong answer.
Where you will see it
On roads where fog or smoke may reduce visibility.
