Fastlane plus barrier-arm optical turnstiles combine fast acting barrier-arms with infra-red beams to detect and deter unauthorised entrants into a building. Fastlane plus combines 24 beams in a detection matrix to detect tailgaters as close together as 5mm. The 16 cm wide pedestals can be used to make both standard width and wheelchair width lanes making Fastlane plus ideal in lobbies where space is at a premium.