Metal road safety barriers, also known as guardrails or crash barriers, are essential infrastructure for ensuring the safety of drivers and pedestrians on highways and roads. These barriers are typically made of steel, with a W-beam design that absorbs the impact of colliding vehicles, minimizing damage and preventing vehicles from leaving the roadway. Metal barriers are anchored to the ground or bridges using sturdy posts and spacers, ensuring their stability and effectiveness. They are available in various configurations, such as anglised, fish tail, or tubular end terminals, and are coated with hot-dip galvanization for enhanced durability and corrosion resistance. Metal road safety barriers play a crucial role in reducing the severity of accidents and saving lives on busy roads.