Neat Startup Idea to Prevent Overcrowding in Shops.
This german company was featured on new.blicio.us, and their idea is to create a stop light system to prevent too many people crowding into small shops. Since social distancing will be around for awhile, at least in some countries, this is quite a handy invention.
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Such a traffic light is already available at Netto, Frankfurter Alle Berlin .