Originally Posted by tom2112
Maybe I was asleep that day in driver's training, but what the heck would you want a rear fog light for? Planning on driving real fast in reverse in the fog? I'm stumped.
More common in Europe, rear fogs are red (bright red) so drivers behind you in a fog (of any kind) can see you sooner than with plain old red tail lights. They're not for you - they're for the people catching up to you. And I guess you benefit if they see you sooner and manage not to hit you.