Guide rails are safety barriers installed along roads, highways, and bridges to prevent vehicles from veering off the path. They are typically made of metal or concrete and are designed to absorb impact, redirect vehicles, and minimize injuries during accidents. These structures are crucial in areas with sharp turns, steep drops, or other hazards. By providing a physical boundary, guide rails help keep drivers and passengers safe, reducing the risk of serious accidents and fatalities. Their effectiveness is enhanced by proper installation and maintenance, ensuring they function as intended in emergencies.