| 摘要 |
A guardrail device is provided to absorb shock using a projecting bar formed on the upper part of a body when a large vehicle collides with a guardrail, to absorb the shock using an oval groove formed on the lower part in case of the collision of a small vehicle, and to reduce the maintenance cost by minimizing the deformation of a guardrail although a vehicle collides with a guardrail. A guardrail device comprises many posts(1) installed in a median strip or a road shoulder of an expressway at regular intervals, a block-out member composed of three walls opened at the upper, lower parts and one side to surround and fix the posts and provided with a projecting bar(3) for decreasing the shock caused by a collision with a large vehicle on the upper part of the intermediate wall, and a bolt hole for fixing a post on the inner wall, and a guardrail member(7) provided with a shock absorbing surface to prevent the separation of a vehicle.
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