Thanks for the guesses so far! lol I really don't know what the sign means... It probably does have something to do with a median like j said, BUT if you were going to spend the money to put up a prominant sign for the layperson to follow, don't you think that you would put up a sign that people don't have to think about? I mean, really, what the hell is that big black thing? And the little things that look like boogers? Oh! maybe the big black thing is a NOSTRIL! That's it! The sign is telling you to face either East or West when you blow your nose! Maybe that way the strong Northern winds won't catch the boogers and send them flying into someone's windsheild!