Been talking and will not stop talking and explaining but, like all kids and myself when I was that age, she doesn't always listen. I know it seems like an invasion of privacy and I am struggling with it but I gotta do what I can to guide her to safety.
I won't weigh in on the topic of reading your childs text message, but I would encourage you to see if there's a program that you can install, which will keep her from texting while driving!
I was recently in Dallas, and Texas has a major ad campaign warning people against driving while texting!
I would think/hope that there's an app which would disable text messaging, if/when it sees that the phone is moving more then, say, five miles an hour.
This is something that you really should check on! (Haven't broken down and purchased my kids a phone yet, but I'll certainly look for such an app, once I DO buy them their own phone)