To take your idea further, the way voice recognition software is developing it will not be long before smart phones could be made so that at any speed above, say 5mph, the touch screen is inoperative and it only works by voice.....and the sound only comes out by bluetooth or speaker. All internet connectivity would be disabled, other than navigation and incoming texts and other messages would be read out.
Add a temperature or other sensor able to detect if the phone is being held and it would not function when held at more than 5 mph when on a road. Perhaps make it have to be connected to power.
So the phone has to be in a dash mount, connected to power and can only be voice operated.
Not a perfect solution, but it would then be no more distracting than a hands free phone kit.
I claim the IP on this idea...so no one can now patent it!
