Talking on the phone (texting, checking email, surfing the web, etc.) while driving is not only dangerous it's also slowing us all down. That's according to a new study:

Motorists yakking away, even with handsfree devices, crawl about 2 mph slower on commuter-clogged roads than people not on the phone, and they just don't keep up with the flow of traffic, said study author David Strayer, a psychology professor at the University of Utah.

If you commute by car an hour a day, it could all add around 20 hours a year to your commute, Strayer said.

So while you're using minutes you're adding hours. Not a good deal.