For Self-Driving Cars, the Hot New Technology Is… Radar – The Wall Street Journal

One of the hottest new technologies for next-generation auto-safety systems and planned “autonomous” vehicles has roots going back a century.

Yes, we’re talking about radar, the same technology that began as a curiosity in the early 20th century, helped Britain to repel the Luftwaffe in World War II, and has long enabled weather forecasting and allowed air-traffic controllers to keep our skies safe.

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