Anti-ram, protective retractable road poles SVZ or blockers, another name for bollards - are used to restrict the entry and exit of vehicles, to regulate and organize the movement of vehicles at facilities and adjacent territories, to organize parking, as well as in public areas where aesthetic appearance of the territory, and at the same time play the role of a barrier device.The advantage of bollard-type road bollards is that they do not interfere with pedestrians and allow free movement between them. Inside the bollard there is a shock-distributing device, which allows the bollard to remain functional even after strong blows. Management is carried out in manual and automatic mode. Bollards have been tested in various climatic conditions and are adapted for use in changing temperatures. The bollard passage limiter can have light and sound signaling.