Below is a quick video regarding lane positioning while riding your motorcycle. Notice what I do as I near the traffic light. I choose a side, in this case, the left side because there was a wide enough gap between the car in front of me and the median. The median was also relatively flat which means I could ride up on it if need be. Regardless, I would rather drop the bike on the car then get hit from behind.
Keep the clutch in gear until you are assured the car behind you and the car behind that one is stopped. And very important, don’t get close to the car in front of you.