Would you like an autonomous car? Would you want others to have autonomous cars? You had better decide soon, because the technology is maturing fast. Autonomous vehicles are likely to lead to fewer accidents, improved energy efficiency, and savings in time and space. They may also cost many jobs, be available only to wealthier passengers, and increase dangers of terrorist abuses. If autonomous cars are going to be on our roads in increasing numbers, should we hand over control to machines in emergencies? What principles should they follow? Can we program human morality into autonomous vehicles? These moral and social issues need to be discussed before it is too late.