Escalator brushes, often called skirt deflectors, are safety features designed to prevent accidents by keeping feet, clothing, and other items away from the moving parts of an escalator. They act as barriers and physical reminders, helping to avoid serious injuries and emergency shutdowns.source https://timesofindia.indiatimes.com/etimes/trending/why-do-escalators-have-brushes-their-secret-purpose-most-people-dont-know/articleshow/118689255.cms