A lot of folks, ... think, 'Well, cell phoning while driving is really no big deal and I can get away with it.' But even if you have a cell phone that's not held by hand and can be dialed by voice, you still have a really big conflict because when you're driving you need to be looking at various different places, you need to be reading signs, you need to be talking to yourself about those in order to -- through your mental speech -- make decisions about where to go with your car. And there's no way to do that while on the cell phone because you have to use your 'inner ears' and 'inner speech' and even your 'inner eyes' to imagine what the person on the phone is talking about.

David Meyer