Traffic light rating system

A traffic light rating system is a system for indicating the status of a variable using the red, amber or green of traffic lights. == Product labelling == === Food and drink === Food may be labelled with a traffic light label showing how much fat, saturated fats, sugar and salt are in that food by using the traffic light signals for high (red), medium (amber) and low (green) percentages for each of these ingredients.

Source: Wikipedia — Traffic light rating system (CC BY-SA 4.0)