As Kevin wrote, a far more likely scenario is the car completely avoiding the crash in the first place. As a technical employee of a car company that builds cars that *could* drive by themselves, the main focus is detecting situations far in advance of an actual collision. Systems don't lose vigilance, aren't drunk or tired or inattentive. Certainly high speeds limit your options, nonetheless one can significantly reduce the consequences of a collision even if it is unavoidable.
Engineers deal with ethics every day. Choices affect people. I remember my engineering ethics class in university many years ago; we explored concepts like this, and the general conclusion is quite a lot like the 3 laws of robotics.
Man, that Asimov really had it goin' on...
