Hydraulic Security Bollards, Hydraulic Barriers, and Cylindrical Bollards ## 1. Hydraulic Security Bollards These bollards are strong metal columns operated by a hydraulic system, usually installed at the entrances of vital facilities (such as ministries, embassies, airports, and government buildings). They can be raised and lowered automatically to control the entry and exit of vehicles, and they prevent unauthorized vehicles from passing with high force. **Advantages:** - High security protection. - Fast operation (raising and lowering within seconds). - Very high impact resistance. - Made from materials like stainless steel. - ## 2. Hydraulic Road Blockers These barriers are typically large metal plates hidden beneath the ground, which rise when needed and completely obstruct the passage of cars — even large trucks. **Advantages:** - Anti-Ram protection level. - Used at main gates, banks, and embassies. - Safe, fast, and reliable. - Remote or manual operation and control system. - ## 3. Fixed Bollards These are also metal columns, but **fixed** (immovable/non-hydraulic), usually placed around sidewalks to protect pedestrians and buildings from car collisions or intentional ramming. **Advantages:** - Lower cost and less complex than hydraulic types. - Made in various sizes and shapes. - Used to separate car and pedestrian lanes. - ### Practical Use Example - **Main gates of sensitive buildings:** A combination of hydraulic barriers and hydraulic bollards is used to prevent any forceful ramming attempts. - **Commercial streets:** Fixed bollards are installed to separate cars and pedestrians and prevent the entry of unauthorized vehicles.