This was posted up on Jalopnik. From what I can tell, I'm not sure who reacted first (in terms of sub-second reaction). But you'll see the Model S traveling at at a relative high rate of speed compared to the stopped traffic in Lane 1 on the freeway. A car, with signal, attempts to move from Lane 1 to Lane 2 but the Model S driver swerves out of the way. Question now is, AP could have swerved away Unless it did almost simultaneously....and is it from object detection or can it read the turn signals from another vehicle? Albeit some signals are yellow vs red vs some older cars/trucks use the brake light circuit as a signal.