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Articulated gate openers can be used for gates with wide posts allowing opening in small spaces. [1] An easy system for DIY installers as they are simple to install but not as aesthetically pleasing as other motor designs.
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 ...
Manual gates are sometimes hung in the manner of a normal gate (i.e. hinged horizontally). In some places, bar gates are installed across suburban streets as a traffic calming measure, preventing through traffic, while allowing authorised vehicles such as emergency services and buses to take advantage of the shorter and more direct route.
The exit gates blocking the road leading away from the tracks are equipped with a delay, and begin their descent to their horizontal position several seconds after the entrance gates do, so as to avoid trapping highway vehicles on the crossing. In the United Kingdom, the exit-side barriers do not lower until the entrance-side barriers have lowered.
The theft of manhole covers often increases when scrap metal prices are high. [18] [19] Manhole cover theft can be a serious problem in China, where missing manhole covers caused at least eight deaths in 2004. [20] According to China's Xinhua News Agency, about "240,000 manhole and street-drain covers were stolen in Beijing in 2004." [21]
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