I love signs, here are some from my recent time in New Zealand! (You might recall that I posted my favorite signs from my NZ trip 5 years ago, as well: http://www.whereisholden.com/2008/01/signs.html )
I have no idea what this one means, but I understand it means go to the right. There was no visible obstacle.
Equal opportunity rocks falling ahead. (Really, it's for glacier ice (top of photo) and rocks (bottom of photo).)