Smart traffic lights get green light for cutting emissions by a quarter
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Traffic light - Simple English Wikipedia, the free encyclopedia
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Green Traffic Light - The Symbol of Go and Safety on the Road
Traffic Lights Need a Fourth Color, Study Says: Here's Why
According to Japanese Traffic Lights, Bleen Means Go - Atlas Obscura
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Adaptive Traffic Lights Could Achieve 'The Green Wave' | WIRED
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Dining by Traffic Light: Green Is for Go, Red Is for Stop
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919 Hitting a bunch of green lights in a row - 1000 Awesome Things
