"In a normal car there's power steering and power brakes, and if the power steering fails, as a strong person you can use your muscles as a fallback to still steer the vehicle", Google's Chris Urmson told re/code in a recent interview. "In our car there is no steering wheel so we have to design really fundamental capabilities. So we have effectively two motors and they work so if one of them fails the other can steer, so the car can always control where it's going, and similar with brakes."
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