A crash barrier, also known as a guardrail, is a safety feature installed along roads and highways to prevent vehicles from veering off the road. These barriers are designed to absorb the impact of a collision, reducing the risk of injury to passengers and minimizing damage to vehicles. They are typically made from materials like steel or concrete and are strategically placed in areas where there is a higher risk of accidents, such as curves or steep embankments. Crash barriers come in various designs, including rigid and flexible types, each serving different purposes. Rigid barriers are more solid and provide a strong defense against impacts, while flexible barriers can bend and absorb energy, reducing the force of a crash. Proper installation and maintenance of crash barriers are crucial for ensuring their effectiveness in protecting drivers and passengers on the road.