Smiling Self-Driving Cars Could Put Pedestrians at Ease

Many people crossing the road engage in the simple pedestrian ritual of making eye contact with drivers waiting in their cars at the intersection. But a video shows baffled pedestrians pausing when they see a driver reading the newspaper or sleeping at the wheel. Such confusion could become more common as growing numbers of people cross paths with self-driving cars.

The usual ritual of exchanging looks between pedestrians and drivers is likely to become endangered as self-driving cars fre

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