What is robot ethics (Thomas Arnold)

Recently, there have been many discussions around the ethical issues that a self-driving car would raise. How would it know if a toddler ran out onto the road, and would it react? Would it keep going to preserve the safety of the passenger? Or would it swerve and perhaps risk the life of the person inside the car, in order to save the child on the road? This question is one of many problems which Thomas Arnold tries to solve every day.