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  1. Wikipedia
    https://en.wikipedia.org › wiki › Bar_gate

    Bar gate - Wikipedia

    • A bar, post, pole, beam, or boom gate, also known as a boom or a boom barrier, is a beam or bar on a pivot used as a gate. The boom is lowered to block vehicular or pedestrian access through a controlled point or raised to permit such traffic. Typically, the bar has a 90° range of motion with a vertical raised resting position and a horizontal lowered resting position. Bar … 展开

    Automatic bar gates

    There are various technologies for an automatic bar gate. One of them is electromechanical, which … 展开

    Usage

    Bar gates are typically found at level crossings, drawbridges, parking facilities, checkpoints and entrances to restricted areas. They are also the usual method for controlling passage through toll booths, and can also be foun… 展开

    How Boom Gates Work: A Complete Guide for Access Control
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