How will driverless cars make life-or-death decisions?

In a future when cars no longer need humans to drive, choices about who might live or die in a crash are already being made -- by the so-called "moral codes" that are preprogrammed into a car's neurology. Like humans, autonomous cars make countless tiny decisions while navigating the complexities of street traffic. But instead of a brain, driverless cars rely on a preprogrammed set of parameters to decide whether to brake, turn or accelerate. "Suppose we have some [trouble-making] teenagers, and they see an autonomous vehicle, they drive right at it. They know the autonomous vehicle will swerve off the road and go off a cliff," said Keith Abney, an associate professor of philosophy at California Polytechnic State University.