Hands Free Cell Phone Risk

When my husband driving he call his friend sometimes while he is driving and I scold him as I do not want he is doing it while driving. As we knew it is dangerous, because instead of concentrating driving your brain is just focusing what your friend/other person say to you, when I am driving I say to my husband “shut up hon I am driving” (lol). It is hard to concentrate driving while you are talking on the phone and I noticed while I was driving there was a guy in front of me was slow even it was in the highway and I noticed he was talking on the phone and if you are talking on the phone while driving it can cause traffic as you will be going to slow down. I have read about "The Truth about Using Hands-Free Devices Behind the Wheel" if youw wanted to read about it just search in Yahoo or Google site.