In many parts of the U.S., it is now illegal to drive while holding a cell phone, but it is OK
to use a cell phone while driving if you have a hands-free phone. There’s a flaw in this
thinking. It’s not the holding of the phone that is a problem, it’s the conversation you are
having with the other person. When you have a phone conversation, your attention is on
the conversation, and therefore your attention is not on driving. It’s an attention problem,
not a hands-free problem.