The state of technology at present can only account for, at best, a high percentage of driving situations, but not the marginal. The edge case/remaining 5-10 percent still depends on human intervention. Such cases may be benign, like the car not knowing what to do when it confronts an unplanned pothole repair crew. Or, a more Machiavellian example could involve human-operated vehicles approaching a stopped autonomous vehicle from 90 degrees at a four-way stop. Realizing that the AI vehicle would not endanger its occupants, the human drivers could serially execute “rolling stops,” effectively freezing the AI vehicle in place while the slow-rolling train of human-controlled cars continued unending during rush hour.