A boom gate is typically designed to automatically open in the event of a power outage or failure. This is done to ensure that people can safely exit a facility or area, even if the electrical system fails.

Most boom barrier gates are equipped with a auto-open module which makes barrier gate automatically open if power is off. This allows the gate to continue automatic opening when triggered by an authorized user or vehicle.

In some cases, boom gates may also have a manual override feature that allows authorized personnel to manually open the gate in the event of a power outage or other emergency situation. This may involve using a key or tool to unlock the gate arm and swing it open, or pressing a button or switch to release the locking mechanism and allow the gate to open.

Overall, the goal of these systems is to ensure that people can quickly and safely exit a facility or area in the event of an emergency, without being trapped or delayed by a malfunctioning gate.