Child pedestrians, self-driving vehicles: What's the safest scenario for crossing the road?

Crossing a busy street safely typically is a result of a social exchange. Pedestrians look for cues—a wave, a head nod, a winking flash of the headlights, and, of course, a full vehicle stop—to know it's safe to cross.

automotive child course driving flash head look of course pedestrians safe self-driving self-driving vehicles social street vehicles