Which factor is likely to decrease the effectiveness of an evacuation plan?

Overcrowding in exits can significantly decrease the effectiveness of an evacuation plan by obstructing the flow of people trying to leave a hazardous situation. When exits are congested, it creates bottlenecks that can lead to confusion and panic, potentially trapping individuals inside and delaying their escape to safety. Efficient evacuations rely on the ability of individuals to move quickly and smoothly toward identified exits.

In contrast, factors such as clear signage and directions, designated assembly points, and regularly updated training enhance the effectiveness of an evacuation plan by ensuring that individuals understand where to go and what to do during an emergency. Clear signage helps guide people to exits without hesitation, designated assembly points provide a safe location for individuals to regroup, and ongoing training keeps everyone informed about procedures, thus preparing them for an efficient and safe evacuation.