I'm not sure whether that is really the case. If something is coming at you, the choices are usually to swerve or to brake (even if that turns out to be ineffe

I'm not sure whether that is really the case. If something is coming at you, the choices are usually to swerve or to brake (even if that turns out to be ineffective in avoiding the collision). People might swerve, if they think the newly chosen path is clear. They just might be mistaken in that, often due to tunnel vision and the unfortunate focus on the immediate and obvious danger, rather on a path avoiding disaster. These example strive me as fairly contrived however. In traffic there simply is no time to make complex moral decisions. In the fraction of a second between realizing that an accident is imminent and impact, people just react (more or less skillfully and fortuitous, depending on many circumstances, including training and sheer luck). Perhaps that's actually the way out for developers of such autonomous vehicles: just focus on what's ahead and if there's danger and braking won't be effective, swerve. If then someone is hit, it is an accident (due to incomplete information), rather than a (planned) sacrifice. Ignorance is a bliss.