Collision Barrier Types: Bracket-style, the connection between the guardrail panel and the post is through bracket connection. Common specifications for guardrail panels are 4320mm*310mm*85mm*3.0mm, and posts are 114mm*4.5mm*1950mm. They are generally installed on secondary and tertiary roads, where there is no high demand for the collision resistance of the guardrail panels. This not only avoids material waste but also saves on the budget.