ALDI, UK
https://www.chargedretail.co.uk
Transferring the traffic light idea into a retail environment could augment controlling the numbers of customers in a store. The red light signals customer to wait and keeping the automatic doors closed. Once customers leave, the light will turn green allowing the next shopper to enter. This automation transfers and utilizes a well-known and functional system to a different application to assure safety while facilitating the reduction of consumers in a store at any given time.