Vehicle barriers are physical structures designed to prevent unauthorized access or protect specific areas from vehicle intrusion. Common types include bollards, gates, and fences, which can be found in places like parking lots, government buildings, and event venues. These barriers help enhance security and safety by controlling vehicle movement. In addition to security, vehicle barriers can also manage traffic flow and protect pedestrians. Some barriers are designed to be removable or retractable, allowing for flexible access when needed. Overall, vehicle barriers play a crucial role in maintaining safety and order in various environments.