German city installs traffic lights in pavements to protect texting pedestrians | via @telegraphtech https://t.co/YZC59cNdrP— Dr.Steven D.Sanders (@DocEngineering) April 27, 2016
German city installs traffic lights in pavements to protect texting pedestrians | via @telegraphtech https://t.co/YZC59cNdrP— Dr.Steven D.Sanders (@DocEngineering) April 27, 2016
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