The moral dilemma in a world of self-driving cars

Washington

HOW many people could self-driving cars kill before we would no longer tolerate them?

This once-hypothetical question is now taking on greater urgency, particularly among policymakers in Washington. The promise of autonomous vehicles is that they will make our roads safer and more efficient, but no technology is without its shortcomings and unintended consequences - in this instance, potentially fatal consequences.

"What if we can build a car that's 10 times as safe, which means 3,500 people die on the roads each year. Would we accept that?" asks John Hanson,…