A 17" touch screen interface could actually be safer than the normal interfaces you find in cars. Is there any interface in a car that you can use without dive

A 17" touch screen interface could actually be safer than the normal interfaces you find in cars. Is there any interface in a car that you can use without diverting your eyes from the road? Horn, blinkers, wipers, radio volume maybe. A touch screen interface with 4 inch buttons is going to divert your eyes for less time than the normal 1/4 inch physical buttons. See Fitts's Law http://en.wikipedia.org/wiki/Fitts's_law http://en.wikipedia.org/wiki/Fitts's_law. Good organization, large buttons, shallow menus, limited options -- should be safer.