An ethical dilemma: When robot cars must kill, who should pick the victim?

We are moving closer to having driverless cars on roads everywhere, and naturally, people are starting to wonder what kinds of ethical challenges driverless cars will pose. One of those challenges is choosing how a driverless car should react when faced with an unavoidable crash scenario. Indeed, that topic has been featured in many of the major media outlets of late. Surprisingly little debate, however, has addressed who should decide how a driverless car should react in those scenarios. This who question is of critical importance if we are to design cars that are trustworthy and ethical.