Stock Photo - View of a red traffic light in Erfurt, Germany, 24 March 2017. The ministry of environmental affairs sees a chance to reduce air pollution by an intelligent traffic light control. Photo: Martin Schutt/dpa-Zentralbild/dpa | usage worldwide. - Erfurt/Thuringia/Germany

Stock Photo: View of a red traffic light in Erfurt, Germany, 24 March 2017. The ministry of environmental affairs sees a chance to reduce air pollution by an intelligent.

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