Google has shared an update about its AI-driven mission to reduce wait times, fuel use, and polluting emissions at intersections – and the early indications are that stops can be reduced by around 30 percent, with emissions dropping around 10 percent.
Don’t count on it. For instance, one of the main drags in Plano,TX was set so that doing the speed limit would cause you to sit at the lights - because one of the city council owned those an ad business and the combo billboard/bench made him money. And the police liked it too, since impatient people would speed the whole way to avoid getting caught at the lights.