Final answer:
The inbound entrance escalators stop when the fire alarm goes into full activation to prioritize evacuation, while the outbound escalators continue to run. This ensures an efficient and orderly evacuation during fire emergencies.
Step-by-step explanation:
When the fire alarm is fully activated, the inbound entrance escalators automatically stop, while the outbound escalators continue to run. This is because the fire alarm system is designed to prioritize the evacuation of people in the building.
By stopping the inbound escalators, it helps to prevent people from entering the building, allowing those already inside to safely evacuate. On the other hand, the outbound escalators continue to run to facilitate the evacuation process and help people exit the building quickly. Overall, this safety measure ensures an efficient and orderly evacuation during fire emergencies.