What is the purpose of visual indicators on elevator doors?

Visual indicators on elevator doors serve a critical safety function by signaling to passengers when the doors are opening or closing. This communication is essential for ensuring the safety and comfort of individuals using the elevator. By providing clear visual cues, such as lights or indicators, passengers are informed about the status of the doors, helping to prevent accidents that could occur if someone attempts to enter or exit the elevator at the wrong time. These indicators are particularly important in busy environments where multiple people may be interacting with the elevator.

While the aesthetic aspect is important for design, the primary goal of visual indicators is functionality and safety. Weight capacity and elevator speed, although relevant to elevator operation, do not directly relate to the purpose of visual indicators on the doors themselves. Thus, the correct answer emphasizes the role of these indicators in enhancing safety and communication for users.