Paradox said:
Riddles arent supposed to be anything like jokes, they get you to think, and you werent thinking.
yes, i was thinking, and what i am thinking is that your riddle was not a very good one. when you discover the answer to a riddle, it should be like, wow, ok, that's it...that makes sense. however, when you told the answer to your riddle, it's like, um, that's a stretch of imagination,,,dosn't exactly fit, but ok, whatever.
like these two parts for example:
(1) "My powers stretch across the globe" == a traffic light's "powers" stretch maybe 100 feet.....they may be located all over the world, but the power of a traffic light is only as far away as one can see it.
(2) "But idle they all stand." ==== idle, as in not moving or changing?? um, i think traffic lights change color all the time. and if the answer to your riddle is trafic lights, then this statement which you said refers to signs does not apply.
just my opinion on the whole thing,,,if you think it's a great mind blowing riddle, with a definitive answer that fits all of the clues, then go for it.