Via thefuture.substack.com.

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 t.co pic.twitter.com/6KcMm1XgAF

— Simon Weckert (@simon_deliver) February 1, 2020