Guardrail Blocker refers to a prevention block, blocker ,block-out. In some places, it is known as a “Spacer” or a “Separator”. It refers to the part between guardrail and post,and with many different shapes or designs. The block itself is an energy absorbing part,so it could make the guardrail deform gradually during the sudden collisions. This is conducive to energy absorption, it helps reduce occupant casualties; at the same time, the block could allocate the crash energy to the guardrail and post, thereby increasing the overall strength and tension of the guardrail system.The guardrail block is installed between the guardrail and the post with the function of energy absorbing. If there is no block, vehicles are forced to stop through the deformation of the guardrail, the post and the roadbed.