What is a common use for video surveillance systems?

A common use for video surveillance systems is to observe passengers in airport terminals. This application serves several important functions, including enhancing security by monitoring passenger behavior and identifying any suspicious activities. Surveillance in airports helps ensure the safety of travelers as well as airport staff by providing real-time visibility and the ability to respond quickly to incidents.

Video surveillance systems are equipped with technology that allows for continuous monitoring and recording, which can be crucial for evidentiary purposes in case of any disputes or incidents. The presence of cameras can also act as a deterrent against potential criminal activity, thereby contributing to a safer environment.

Other options, while they may involve forms of monitoring or control, do not directly align with the primary functions of video surveillance systems. Monitoring traffic signals typically involves traffic management systems rather than surveillance; controlling lighting systems falls under automation systems focused on energy management; and while data storage is essential for many systems, storing sensitive information is not the primary application of video surveillance technology.