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Jersey barriers on the road. A Jersey barrier, Jersey wall, or Jersey bump is a modular concrete or plastic barrier employed to separate lanes of traffic.It is designed to minimize vehicle damage in cases of incidental contact while still preventing vehicle crossovers resulting in a likely head-on collision.
The plastic markers now used widely throughout the United States and elsewhere appeared three decades later. They were originally invented by American engineer Sidney A. Heenan in the course of his employment with the Stimsonite Corporation in Niles, Illinois. [10] Heenan filed an application for a patent on October 23, 1964. Patent No ...
In the late 19th century the first cast iron bollards were made. From 1915 onwards there was a standard bollard of cast iron, weighing 70 kg (154 lb), with three Saint Andrew's Crosses from the coat of arms of Amsterdam. This bollard already looked like the modern Amsterdammertje, although, amongst other differences, it was thinner and heavier. [2]
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A bell bollard is a style of bollard designed to deflect vehicle tires. The wheel mounts the lower part of the bollard and is deflected by its increasing slope. Such bollards are effective against heavy goods vehicles that may damage or destroy conventional bollards or other types of street furniture. [citation needed]
In many countries such as Australia and in some American states such as California, traffic barrels are rarely seen; pillar-shaped moveable bollards are instead used where larger and sturdier warning or delineation devices are needed. Typically, bollards are 1,150 mm (45 in) high fluorescent orange posts with reflective sleeve and heavyweight ...
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