Same thing happened to me yesterday, teen driver blew through a yield sign as I was making a left turn. She didn't seem to be playing with her cell phone, so I don't know what distracted her. Scary, I have a teen driver of my own... I tell her "be careful" every time she gets into the car. At this point, I've said it so much, I'm not sure it means much. She is pretty alert and aware, but I wonder if that will continue as she gets more confidence. I don't want her to get hurt or to hurt anyone else.