Riding in blinding conditions, dense fog in particular, is definitely not advisable. If you are dumb enough to do it, like me, I suggest you find a car to follow at a safe distance in case they crash ? Hopefully it's a hot chick you can rescue and start a relationship with. If you hit a downed tree/limb/roadkill in a dense fog you're gonna have a bad day. If you don't know the road I suggest trying to find a few cars to follow. Odds are they know the road better and won't accidentally blow through a stop sign or drive off a cliff.