Hydraulic security barriers (road blockers) and hydraulic cylindrical barriers The hydraulic security barriers (Hydraulic Barriers) are the first line of defense to protect vital facilities from vehicle intrusion, and they rely in their operation on an oil pump unit (Piston) that gives them high lifting power and response speed. Here is the fundamental difference and uses for each of Road Blocker and Bollards: 1. Hydraulic Security Barriers (Road Blocker) Also known as road blockers or "knives", they are a wide steel platform that rises from underground to completely block the road. Strength: Designed to stop large trucks and heavy speeding vehicles (High Impact). Coverage: Covers the entire width of the lane, preventing even motorcycles from passing beside it. Where are they used? Embassies, military bases, airports, and palaces. Features: Very clear visibility for drivers thanks to reflectors and lighting. Withstand high axial loads when trucks pass over them while closed. 2. Hydraulic Cylindrical Barriers (Hydraulic Bollards) These are cylindrical steel columns that rise and fall vertically, and they have a more aesthetic appearance than the first type. Flexibility: One or a group of columns can be installed at specific distances (usually 1.2 meters) to allow pedestrian passage and prevent vehicles. Design: They blend wonderfully with the facades of hotels, commercial centers, and tourist areas. Where are they used? Entrances of hotels, banks, pedestrian streets, and residential complexes. Features: Do not obstruct the movement of pedestrians or wheelchairs. The ability to control each column individually or collectively. Quick Comparison Point of Comparison Hydraulic Barrier (Road Blocker) Cylindrical Barrier (Bollards) Protection Level Very High (against trucks) Medium to High (depending on diameter) Aesthetic Appearance Purely Industrial/Security Modern and Elegant Pedestrian Traffic Completely obstructs pedestrian traffic Allows pedestrian and bicycle traffic Construction Training Requires deep excavation and ample space Requires deep cylindrical excavation Key Selection Criteria (K-Rating) When purchasing these systems, ensure they comply with international standards for impact resistance, the most famous of which are: K12: Means stopping a 7-ton truck traveling at 80 km/h. K8: Means stopping the same truck at 60 km/h. K4: Means stopping it at 45 km/h.