in 2009 a driver using his gps killed joel feldman's 21-year-old daughter, casey. >> it's nuts, in mypinion to have things so you can have drivers that cantects, email, access social media or the internet while they're driving. >> ideally you want a simple system. >> a new study backs up that opinion. jake fisher took us out on the test track. >> some of the adjustments are actually in this very, very dense and confusing system here. so if i want to get into some of my safety systems -- >> you're having to spend a lot of time looking at the screen while you're driving. >> reporter: exactly right. they found accura, cadillac, lexus, mercedes and volvo have the most distracted. ford, gm, and chrysler are rated as having the least. new technologies like lane departure warning and autoemergency braking make highf tech cars safer but even those are no substitute for an alert, engaged driver. >> these screens should be locked out, except for driving essential tasks while a car is moving. it's not rocket science. you want people to be focussed on the road. >> reporter: some allow only minima