Deciding when to turn left in front of oncoming traffic without a green arrow is one of the more difficult tasks for human drivers and one that causes many crashes. Autonomous vehicles have the same trouble.
Waymo CEO John Krafcik said in a recent interview that his company’s vehicles are still encountering occasional problems at intersections.
“I think the things that humans have challenges with, we’re challenged with as well,” he said. “So sometimes unprotected lefts are super challenging for a human, sometimes they’re super challenging for us.”