I don’t understand how they work, what they’re hooked up to and how they know when to turn from green, to yellow, to red. Are they timed? Is there a sensor, perhaps a small man hiding in the pole controlling it?
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Stoplights work pretty much like you’d want them to at least in some states/municipalities. The expense of creating and maintaining a highway system in big cities where it is most expensive justies a suitably high tech strategy for using stop lights to maximize traffic throughput under diverse situations. How exactly? How would you do it …?
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