Hands-free cell phone in car is not safer than hand-held
In light of the recent thread about cell phone use while driving, I thought I'd point out that it's a myth that using a hands-free device (like a bluetooth headset or one of the new cars that lets you plug in the phone) is safer than talking while holding the phone in your hand. Every study I've seen shows that the significant piece of cell phone use while driving that makes it unsafe is talking with someone who is not physically present in the car. (If they're sitting next to you, they can see when traffic is bad and know to shut up.)
There is evidence to suggest that when a person drives while holding a cell phone, s/he slows down to try to compensate, but when hands-free technology is used, people get a false sense of security.
There was a study, maybe more than one, about five years ago that showed that talking on a cell phone was about as unsafe as driving while intoxicated.
Here's just one study, but there's lots more information on the web, if you'd like to look.
There was a time, many years ago, when I did talk on my cell phone while in the car. Given the huge amount of evidence now available, I don't any more. And I don't talk to anyone if I know they're on a cell phone - I tell them to call back.
Here is a link that might be useful: National Safety Council link