| 摘要 |
<p>The road blocker according to the present invention controls and selectively impedes passage of vehicles on a roadway. It comprises a framework for burying and integrating in a trench on a roadway, a blocking element which is rotatably attached on said framework and at least one actuating means for erecting and retracting said blocking element pivotably around an upper rear profile of said framework. The blocking element according to the present invention has an impact surface which is concave in shape for encompassing and localizing tires of a colliding vehicle during use. The blocking element comprises a plurality of support members whose lateral surface are concave arc shaped for receiving and transmitting impact forces occurring on the impact surface to the framework during use.</p> |
