How can O'Hare Badge holders access restricted areas?

To access restricted areas at O'Hare International Airport, badge holders must present their badge to access control systems. This procedure is essential for maintaining security within the airport and ensures that only authorized personnel can enter these sensitive areas. Badges are uniquely assigned to individuals and contain pertinent identification information that security systems verify before granting access.

The other options, while they may involve security procedures, do not allow for the direct access that presenting a badge does. Personal identification documents serve different purposes and may not be sufficient for entry. Using a security escort is necessary in some situations, but primarily for those who do not have the proper clearance. Calling ahead to security could provide advisories or permissions but does not physically grant access, making the presentation of a badge the clear and necessary method for entering restricted zones.