There was one I saw recently that said "Share the road" and on top of that sign there was an image of a bicycle. I found it funny because when my sister and I were watching Return of the King at the movie theatre a year and a half ago or so, the part where Samwise Gamgee was in slow motion and was saying "Share the load?" we both started laughing. Anyway as I was driving out of the movie theatre, people were being incompetent drivers so I was yelling to no one in particular "SHAAAARRRRRREEEEEE THE ROOOOOOOOOOAAAAAAAAAADDDD"
However the oddest road sign I've come across was one that read "Danger disease controlled area" What is that supposed to mean? My sister and I never quite figured out what exactly the disease was. But it's nailed to this rotten post and there's a dirt road that leads past the gate and the trees look all dead and eerie. You get the feeling that if you go on that road, you will die. Haha :D