2010 ADA Standards for Accessible Design Pocket Guide
206.8 Security Barriers.
Security barriers, including but not limited to, security bollards and security check points, shall not obstruct a required accessible route or accessible means of egress. [S.H. 7.4]
EXCEPTION: Where security barriers incorporate elements that cannot comply with these requirements such as certain metal detectors, fluoroscopes, or other similar devices, the accessible route shall be permitted to be located adjacent to security screening devices. The accessible route shall permit persons with disabilities passing around security barriers to maintain visual contact with their personal items to the same extent provided others passing through the security barrier.