stanfordbusiness: New “smart” traffic lights in Toronto adjust their signals to current traffic patterns, reducing people’s travel times by 25% and lowering vehicles’ carbon-dioxide emissions by 30%. In this Slate article, Stanford University Scholar-in-

stanfordbusiness: New “smart” traffic lights in Toronto adjust their signals to current traffic patterns, reducing people’s travel times by 25% and lowering vehicles’ carbon-dioxide emissions by 30%. In this Slate article, Stanford University Scholar-in-

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