This is a crucial point; the result of collision barriers is the safety of people and vehicles. Without a sense of security, there is no room for beauty. Therefore, it demands that collision barriers be robust, withstand congestion and conflict, and provide a sense of safety and reliability.

Furthermore, the height of the collision barrier should not be too high to obstruct the line of sight. The height of the collision barrier can be determined based on the distance from the bridge deck to the water level. Generally, when the clear space is three meters or more, the handrail of the collision barrier should be about one meter high. When the clear space is less than three meters, the height of the collision barrier can be appropriately reduced. For wider bridge decks with multi-lane bridges with a median strip, the height and end face standards of the collision barrier can be slightly larger to enhance the formal appearance.