As an when self-driven cars like what Google is developing come into common use, the most likely scenario that we will find is that of drivers (or should we call them passengers??) dozing off inside the vehicle.
As we all know, keeping awake in a moving vehicle is quite difficult and most passengers tend to doze off. In fact, one of the tenets of driving is that the person sitting next to the driver, should NOT sleep, as this tends to make the driver also sleepy.
With self-driven cars, the ‘driver’ does not have much of an activity to do and keep busy. Hence the most likely scenario — driver asleep at the wheel.
What happens in case of emergencies is anybody’s guess!!!