I talked about this a few months back. Researchers in North Carolina are looking at changing the traffic lights we encounter every day. For as long as I’ve been driving, the overwhelming majority of traffic signals have had red, yellow, and green lights. But these researchers are working on adding a fourth light to the mix, a white light. No reason for this extra light is to trigger autonomous vehicles. They’re preparing for the day when there are more driverless vehicles on the road than there are drivers. Testing of this fourth signal is about to begin, and many people are skeptical that it will work the way they want…

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