I agree with others that say this is confusing. What will you do when you actually need to change lanes to the left?

I idly considered making a fake mace, with a spiky ball made out of styrofoam spray painted a metallic colour, attached to a 1" dowell and mounted on the rear rack sticking out to the left, 18' into traffic. I figured they'd give a wide berth to avoid the chance of scratching their car.

http://bikeforums.net/attachment.php...hmentid=492611
For the OP.

Signal left. Notice the title of the thread? An experiment. This isn't what I do on my daily commute or anything, it's just something I tried for 15 minutes out of curiosity.

I might try to find some sort of hiz viz stick I can attach to my bike that produces a similar effect, because it seems the chance of scratching their car is enough to deter bad passes, while the risk of killing someone ironically isn't.

And I heard him exclaim, ere he rode out of sight,
I'm signaling left but I'll probably turn right

You wouldn't think the traffic on "Mars" was that Bad ..