Some studies found that even hands-free phone calls impair drivers significantly, as do traditional activities like changing the radio or just talking to anothe

Some studies found that even hands-free phone calls impair drivers significantly, as do traditional activities like changing the radio or just talking to another person in the car. Arguably anything that increases cognitive load (including a stick shift) could have this effect. Unless we're going to get into regulating everything you do in car, we probably need to just leave it to drivers or have self-driving cars. http://mysite.verizon.net/horrey/papers/Horrey_HF2006meta.pdf http://mysite.verizon.net/horrey/papers/Horrey_HF2006meta.pd...