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  2. Bar gate - Wikipedia

    en.wikipedia.org/wiki/Bar_gate

    Bar gates, especially manually operated ones, are often counterweighted to allow easier manual control. [7] Bar gates are frequently paired end to end or closely offset to block traffic in both directions. Some bar gates also have a second arm which hangs 30 to 40 cm below the upper arm when lowered to increase approach visibility.

  3. Traffic barrier - Wikipedia

    en.wikipedia.org/wiki/Traffic_barrier

    Traffic barrier with a pedestrian guardrail behind it. Traffic barriers (known in North America as guardrails or guard rails, [1] in Britain as crash barriers, [2] and in auto racing as Armco barriers [3]) keep vehicles within their roadway and prevent them from colliding with dangerous obstacles such as boulders, sign supports, trees, bridge abutments, buildings, walls, and large storm drains ...

  4. Four-quadrant gate - Wikipedia

    en.wikipedia.org/wiki/Four-quadrant_gate

    A level crossing with manually-controlled full barriers at Chertsey, England. The barriers are rising. A four-quadrant gate or full-barrier equipment is a type of boom barrier gate protecting a grade crossing. It has a gate mechanism on both sides of the tracks for both directions of automotive traffic.

  5. Level crossings by country - Wikipedia

    en.wikipedia.org/wiki/Level_crossings_by_country

    In Vietnam, there are still "roller~barriers/gates" in use, either electric or manual. An extremely long level crossing is in Ho Chi Minh City, near Gò Vấp station, crossing Phạm Văn Đồng Street. [48] The track crosses about twelve carriageways. There are 8 barriers and 2 very long roller-barriers/gates that must be pushed into place.

  6. Road barriers move automatically to ensure safer traffic flow

    www.aol.com/road-barriers-move-automatically...

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  7. Barrier transfer machine - Wikipedia

    en.wikipedia.org/wiki/Barrier_transfer_machine

    A barrier being moved on the Golden Gate Bridge Hinge pin used as the linkage of moveable barriers [1] This large machine was used on the Auckland Harbour Bridge to shift the center lane back and forth to accommodate rush hour traffic. Road Zipper machine at the Golden Gate Bridge, San Francisco, California.

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