> Whether or not they are eventually possible is an open question. They're probably not possible with the road system we have but we redesigned our road system

> Whether or not they are eventually possible is an open question. They're probably not possible with the road system we have but we redesigned our road system to accommodate cars(arguably with terrible results for non-cars) and we could probably redesign it again for autonomous cars. For example by requiring pedestrians and cyclists to wear radio transponders.