Reporter: Good morning. This Triple A foundation study looked at on-board hands-free systems that sync with your1and allow you to give voice commands and found they can be so mentally taxing it's a kind of2your checkbook while driving, and that can leave you distracted after the fact long enough to go not one football field,but three.J.C.Good's college graduation went from a perfect day to a nightmare in seconds, thanks to a distracted driver on a hands-free device.Good: He turned left through the red light, and as he did that the 18-wheeler swerved, trying to miss him. So quick the front of his car was then3full force into our family's car.Reporter: Good's parents were killed instantly. She was given just a4percent chance of survival. She beat those odds, but suffered a5brain injury.Good: I don't know how but the brain cells that know how to move my wrist or my fingers or my ankle or my toes and I'm6I can walk.Reporter: J.C. now advocates against distracted driving which killed more than 3100 people and injured an7424000 in 2013 alone. (who would like to call? 801...) A new study released this morning finds even new hands-free systems that work with voice commands leave drivers with a technology hangover.David: You kind of getting out of that distracted zone into much more of an alert driver, but that takes time. It takes up to8seconds.Reporter: University of Uta professor David Strayer9more than 250 adults in 10 vehicles.Drivers on test: Oh my Gosh I guess that is a stop sign.Reporter: Lingering distraction was found across the board. How long10on how hard the system is to use.David: If you are all of a sudden talking to your car, talking to your phone, you are now focusing on one task, to the11of attending to the driving environment. When you then all of a 12hang up, well, you don't come to right away. You now have to say where am I.Reporter: Seconds of distraction, Good knows, can be deadly.Good: I know whatever that young man was talking about on his phone13was not more important than my parents' lives.Reporter: Study also looked at the voice commands by the three14 cellphone platforms. They found those to be just as distracting. Bottom line, the researchers say just because your car can do all of these things, like voice to tweet, doesn't mean you should do it while you're driving. (Kell)Kell: That is really good advice, Kris! The woman at the end made the best15 , whatever you are talking about is not more important than life. We always forget that cause we think just one more, one more.The other TV program hostess: You can't do it. The question is, too, a lot of times if you're stopped at the red light people may check their phone. Now that we know it's 27 seconds till you're really back on, just leave it alone. Just leave it alone.