you might consider filtering to the front in the go straight lane. wait with traffic, then on the green light tilt your head down to look at the car next to you, when they take off you follow. if they wait for you, nod your head a little so they know it's ok for them to go. no eye contact, no waving of hands. the cars behind will see this and pass you as they follow the lead car. anyway that's how I handle many intersections. the lead car acts as a football blocker and leads the way.