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Bollard style: Post and ring: Bollards are short vertical posts most commonly used as traffic or parking barriers. Bollard style bike racks add one or two arms to which bikes may be secured. [5] Post-and-ring racks are a North American variant on the bollard type. Bollard-style rack in Seattle, Washington, United States
Bollards may also be used to enclose car-free zones. Bollards and other street furniture can also be used to control overspill parking onto sidewalks and verges. [11] Bollards can be temporary and portable, such as this traffic control bollard separating the road from the worksite.
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 ...
Electro-hydraulic actuators (EHAs), replace hydraulic systems with self-contained actuators operated solely by electrical power. EHAs eliminate the need for separate hydraulic pumps and tubing, because they include their own pump, [1] simplifying system architectures and improving safety and reliability. This technology originally was developed ...
A servo valve receives pressurized hydraulic fluid from a source, typically a hydraulic pump. It then transfers the fluid to a hydraulic cylinder in a closely controlled manner. Typically, the valve will move the spool proportionnaly to an electrical signal that it receives, indirectly controlling flow rate.
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.
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