| 摘要 |
An above-grade trafficway barrier adapted to arrest heavy vehicles, with an obstruction member extending between opposite sides of the trafficway, and controlled by its known mass deposed upon the grade level and preferably by spaced inertia blocks deposed at opposite sides of the trafficway, the known mass not to exceed the strength of the obstruction member and coupling thereof regardless of the vehicle mass. Impact force being gradually applied and dissipated by the known mass through a lever system with simultaneous roll, turn and sliding movements of said spaced masses; whereby the obstruction member is not subjected to greater force exerted by the impacting vehicle.
|
