Evacuation time curves influence egress design by determining which of the following?

• A. The color of exit signage.
• B. The types of fire suppression agents used.
• C. Travel distances, number of exits, and required fire protection features to ensure safe egress within a given time.
• D. The building's exterior architectural style.

Answer: (C)

Evacuation time curves set the time targets for people to reach safety from various parts of a building, given occupancy and hazard. Designers use these curves to size and shape the egress system so that people can exit safely within that allotted time. That means deciding how far occupants can travel (travel distances), how many exits are needed to prevent crowding or bottlenecks, and what fire-protection features are required—such as fire-rated walls, protected stairs, smoke control, or automatic sprinklers—to maintain safe egress within the target time. The color of exit signage, the choice of fire suppression agents, or the building’s exterior architectural style are not dictated by evacuation time curves.