It seems some artist got creative and decided to use this public good as his canvas. I guess he should have made the red light a heart and the yellow light a “peace” symbol or perhaps a golden dollar.
I saw it in Bogotá in the intersection of calle 127 and carrera 13. Lets see for how long it stays like that.
Also note the “A” logo (actually there's two, you can see just a part of one at the left). I don't know what it means but it started appearing in lots of different lights all over Bogotá. Of course, it's kinda difficult not to view it as a couple having sex. Does anyone know where it comes from?