Comment by toast0

California law does not address accelerating on a yellow. The driver's handbook (which is not the law) says

> A yellow traffic signal light means CAUTION. The light is about to turn red. When you see a yellow traffic signal light, stop, if you can do so safely. If you cannot stop safely, cautiously cross the intersection.

The bright line rule is not to enter the intersection on a red light, defined as crossing the stop line if present, crossing the first line of a pedestrian crossing if present, or actually entering the intersection if there are no lines.