Just done junctions 16-18 on the M4 - visibility to normal tail lights was about 1 mile - bends, hills etc meaning the lie of the land limited visibility more than what fog there was did. As "useful" visibility wasn't reduced traffic was moving at its normal 70-80 with some clear gaps. Yet 30% of cars had both rear and front fogs on. Why???
As a result it was often virtually impossible to tell if those red christmas trees 400m in front were braking or not, don't know about you but that's something I like to know instantly and not have to think about.
Are these people not capeable of thinking "what's the visibility like?", before reaching for the fog light switch, or it is just a case of the light going on at the slightest hint of fog, even if normal lights are perfectly visible at great distance.
As a result it was often virtually impossible to tell if those red christmas trees 400m in front were braking or not, don't know about you but that's something I like to know instantly and not have to think about.
Are these people not capeable of thinking "what's the visibility like?", before reaching for the fog light switch, or it is just a case of the light going on at the slightest hint of fog, even if normal lights are perfectly visible at great distance.