On Sat, 14 Apr 2012 17:19:21 +0100, Dave Plowman (News) wrote:

Headlights as well will just produce scatter and blind you.

Can do, depending on conditions, but not always.

Always. That's why foglights are low mounted and illegal in good
visibility. If the headlights were good in fog - why have specialised
lighting just for it?

Quite agree.

But I'm talking about proper fog where you're reduced to walking pace.

Proper fog that most people never ever see.

I think I've had to drop to front fogs just a handful of times up
here on the North Pennines where we almost live in the hill fog. When
the snow poles are too far apart to see from one to the next, there
is thick fog visibilty about 15' max and everything is also smoothly
covered in snow with no tracks to follow it makes for an
"interesting" drive. Fast walking pace, concentration, and "if it
gets bumpy I'm probably no longer on the road". B-)

--
Cheers
Dave.