Self-driving cars could lead to a fourth, white traffic signal — or no signals at all: researchers

The advent of self-driving cars could lead to a number of changes to traffic laws down the road, including a possible fourth traffic signal, researchers say. On top of the ubiquitous red, yellow and green, a white light could signal that autonomous vehicles are in charge of the intersection. Or the vehicles could possibly make signals irrelevant altogether. North Carolina State University associate engineering professor Ali Hajbabaie is among those imagining the future of traffic lights.

While it is good at this early stage of AV development that people are thinking creatively about how to facilitate the safe deployment of safe AVs, policymakers and infrastructure owners should be careful about jumping too soon on AV-specific investments that may turn out to be premature or even unnecessary," Waymo spokesperson Sandy Karp said in an email to The Associated Press.

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