Crash barriers are safety structures designed to prevent vehicles from leaving the roadway during accidents. They are commonly found along highways and bridges, helping to reduce the severity of collisions by absorbing impact energy. These barriers can be made from various materials, including steel, concrete, and plastic, and are engineered to withstand significant force. The primary purpose of crash barriers is to protect both drivers and pedestrians by redirecting vehicles back onto the road or preventing them from falling off elevated surfaces. Proper installation and maintenance of these barriers are crucial for ensuring their effectiveness in enhancing road safety and minimizing injuries during accidents.