Turnstile
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A turnstile is a form of gate which allows one person to pass at a time. A turnstile can be configured to enforce one-way human traffic. In addition, a turnstile can restrict passage only to people wh
Old turnstiles at Alewife station on the MBTA Red Line in Cambridge, MA, U.S.
A wooden turnstile for keeping livestock penned in (Zwierzyniec, Poland).
A circa-1930 turnstile and kiosk at the Bath Recreation Ground
An array of historic NY subway turnstiles, from 1939
Optical turnstile
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An optical turnstile is a type of turnstile designed to restrict or control access to a building or secure area. Optical turnstiles differ from mechanical turnstiles in that they rely on infrared sens
Turnstile
…is used at unstaffed exits of Chicago "L" stations, and is also used increasingly in New York City Subway stations since the turn of the 21st century. Optical turnstile Revolving door…
Drop Arm style optical turnstiles
Slimlane swing glass optical turnstile with bar code readers and elevator destination dispatch screens