Is there an app that will auto send message that I'm driving?

A

AC Question

Is there an app that will connect with my car's bluetooth, and auto send a message that I'm driving so my sms won't notify me that a txt has come in until the car is off? I'd like to use it, but mainly for my 15 (soon to be 16) yr old son. He knows that he is never, ever to look at his phone when driving, but I know the temptation will be there if it notifies him!
Thanks