To be completely honest I don't usually ride in the street (depending on where I'm riding); when I do if I stick to the right shoulder so I'm not in the way. If I ever have to turn left I use the crosswalk and wait for the light change. Is it legal? I have no idea honestly. I would rather not risk serious injury than to do what I legally can in an environment that is unforgiving to me as a cyclist. Better safe than right.