Traffic signals have mostly been the same since I started driving nearly fifty years ago. Three lights are stacked: red on top, yellow in the middle, and green on the bottom. Back in the early 1900s, when the automobile started hitting the road, there was only a red and green light. It looks like this could be changing soon. There's talk of adding a fourth light that's white. This light is being developed to aid autonomous or driverless vehicles. The white lights will come into play when multiple driverless vehicles are in the area. We should start preparing because this will be a significant change...





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