Cars that drive themselves are no longer just a concept you'd see in sci-fi movies imagining the near future. Companies like Waymo are already using self-driving cars, and you can ride in a robotaxi ...

Many of us dread having to go through that poorly timed intersection in our area where the light is red for several minutes, turns green just long enough to let maybe three cars through, then changes ...

European traffic lights show red and yellow at the same time to make clear that a red light is about to turn green. This ...

Every time we stop at a red light, wait patiently for green, or slow down on yellow, we’re participating in a system that quietly keeps billions of people safe. But have you ever wondered who invented ...