Cuando se circula con niebla, el conductor debe...

The big problem with driving in fog is that visibility is reduced and the road surface can be slippery. As our visibility is reduced, we must adapt our speed to our field of vision and use the right lights. FRONT FOG LIGHT: fitting and using it is NOT compulsory; it is white or selective yellow; it may be used, voluntarily, in fog, heavy rain, snowfall, clouds of smoke or dust or similar conditions; it may also be used on narrow roads with many bends, that is, roads with a carriageway 6.5 m wide or less that are signposted with “dangerous bends” signs. REAR FOG LIGHT: fitting and using it is compulsory; it is red; it must be used in THICK fog, VERY heavy rain, HEAVY snowfall or DENSE clouds of smoke or dust. During the day, the front fog light may be on with just the sidelights, but it may also be used together with the dipped headlights or main beam. At night, it must be used at least with the dipped headlights. During the day, the rear fog light must be used at least together with the front fog light or the dipped headlights. At night, it must be used at least with the dipped headlights.