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The Maeslantkering ("Maeslant barrier" in Dutch) is a storm surge barrier on the Nieuwe Waterweg, in South Holland, Netherlands. [1] It was constructed from 1991 to 1997. As part of the Delta Works the barrier responds to water level predictions calculated by a centralized computer system called BOS. It automatically closes when Rotterdam ...
A flexible debris-resisting barrier is a structure used to mitigate debris flows or to contain flow-entrained woods. These structures mainly consist of interconnected metallic components (cables, posts, shackles...). Flexible debris-resisting barrier are derived from rockfall barriers and were first proposed in the middle of the 1990s in the USA.
Bar gate. Animation of level crossing booms lowering in Queensland, Australia. A bar gate in the Netherlands. A bar, post, pole, beam, or boom gate, [1] also known as a boom or a boom barrier, [citation needed] 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 ...
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 ...
Turnstile. A turnstile (also called a gateline, baffle gate, automated gate, turn gate in some regions) 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 who insert a coin, ticket, transit pass, security ...
Road Zipper machine at the Golden Gate Bridge, San Francisco, California. A barrier transfer machine, also known as zipper machine or road zipper, is a type of heavy vehicle that is used to transfer concrete lane dividers, such as Jersey barriers, in order to relieve traffic congestion during rush hours. Many other cities use them temporarily ...
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