99 smartphones are transported in a handcart to generate virtual traffic jam in Google Maps. Through this activity, it is possible to turn a green street red which has an impact in the physical world by navigating cars on another route! #googlemapshacks https://t.co/3gixMxopE6 pic.twitter.com/6KcMm1XgAF
— Simon Weckert (@simon_deliver) February 1, 2020

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