from everything i've read - it is the person who is turning left who is at fault. The light was yellow when i turned, and i believe it was red when the collision occured.

Accident happened at a regular intersection with turning lanes and lights. I was turning left. The light turned yellow, and the car approaching sped up to make the light. I thought he was stopping, so i made the turn. At the time of the collision the light was red. I understand that it is my fault. ...