http://www.smartersecurity.com/entry-security/fastlane Barrier free turnstiles function by incorporating advanced technology with multiple detection beams to ensure that no one will follow behind an authorized user. The ClearStyle 200 is an idea barrier free turnstile because it offers security combined with a crisp, refined appearance. With the ClearStyle 200 you know your lobby will be secure, and it will be secured with the style and sophistication you would expect from the Fastlane Brand.