While most autonomous vehicles are being designed to communicate through radio signals, bar codes are the type of robust system that would serve as a welcome backup, says Christoph Mertz, a principal project scientist at Carnegie Mellon University’s Robotics Institute. “Redundancies are always good, especially with autonomous vehicles, because it can be deadly if there is a mistake,” he says. “Any information you want to pass around, you want to pass it around in a number of ways.”
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