What does "delayed egress" refer to in an access control system?

Delayed egress refers specifically to a system designed to manage the immediate egress or exit from a building by introducing a delay before the door unlocks. This feature is critical in security situations, allowing for controlled exits, particularly in facilities where unauthorized exit could pose a risk, such as secure environments or high-security areas.

The delay, typically around 15 seconds, gives security personnel the opportunity to assess the situation or respond if an unauthorized exit attempt occurs. Thus, the correct option points directly to the operational characteristic of a delayed egress system, which aims to balance safety and security without completely restricting individuals from exiting a building.