Turnstes

Turnstiles are a type of physical barrier used to control the passage of people. They are typically found at the entrances of public places such as stadiums, amusement parks, transit stations, and office buildings. The most common type is a revolving door with three or four panels that rotate around a central axis. As one person passes through, the panels rotate to block the entrance, preventing unauthorized entry or multiple people from passing at once.

Turnstiles are often used in conjunction with ticketing systems or access control devices. When a valid ticket or pass is presented, the turnstile unlocks and allows a single person to proceed. This ensures that only paying customers or authorized individuals can enter an area. Some turnstiles are designed to be accessible to people with disabilities, featuring wider openings or manual override mechanisms.

The primary purpose of a turnstile is to manage crowd flow and enhance security by enforcing entry restrictions. They provide a physical and visual deterrent to unauthorized access and help in counting the number of people entering a venue. While most turnstiles operate mechanically, some advanced models incorporate electronic sensors and can be integrated with surveillance systems. The design and mechanism of turnstiles can vary, but their fundamental function remains the same: controlled passage.