How Do Anti-Theft Wheel Locks on Shopping Carts Know to Trip at the Edge of the Parking Lot?
How do shopping carts lock beyond a certain area? I've seen signs that say shopping carts automatically lock when you take them beyond a certain line. I don't think there's any sort
Shopping carts that lock and security gates? Shoppers sound off on retailers' anti-theft tactics | CBC News
Locking carts to prevent thefts at Fred Meyer - YouTube
Anti-Theft Device Keeps Shopping Carts on the Job - YouTube
How do locks on the wheels of shopping carts work? - Quora
File:Shopping cart lock.jpg - Wikimedia Commons
Viral Videos Show Target Shoppers Battling Anti-Theft Cart Locks