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Have you ever experienced a situation where you have to get out of the elevator because the elevator is already fully loaded. During rush hour and in restaurants, we often encounter this problem. These situations are not only embarrassing, but also time wasting. The red and green lights on Smart EElevators show the loading conditions, allowing people to decide to enter the elevator or not depending on which of the lights is illuminated.
Yuanyuan Liu, Xueya Li, Xuezhen Liu, Chan Xiang