Abstract: A friction-reduction system for causing the front wheels of a terrorist vehicle to leave the ground during sideward deflection of a terrorist vehicle by an arresting system which includes a rigid immovable crash barrier positioned at one side of a driveway and a deflector positioned at the other side of the driveway. In one embodiment the friction-reduction system includes a transverse ridge or bump across the driveway just before the point of impact of the deflector such that the front wheels of the speeding vehicle leave the ground at the time of impact and following deflection. This minimizes the physical pressure on the deflector making it possible to provide a lighter and more efficient deflector and one which assures deflection of the vehicle. In another embodiment, a ramp with a transverse drop off is used in place of the ridge; with the ramp either rising or dropping away just ahead of the deflection point.

Abstract: A terrorist vehicle arresting system includes a rigid immovable crash barrier postioned at one side of a driveway and a turnstile having a circular sector positioned at the other side of the driveway in such a manner that upon entrance of an unauthorized vehicle through a corresponding gate across the entrance of the driveway, means are provided to rotate the turnstile such that the turnstile deflects the vehicle into the crash barrier. In a further embodiment, two opposing turnstiles are used to wedge an oncoming vehicle therebetween. In one embodiment, the terrorist vehicle arresting system includes a rope-barrier attached to an elevating and lowering mechanism on one side of the driveway and is attached at its other end to the turnstile, such that upon the unauthorized attempted entrance and the striking of the rope-barrier, the turnstile is rotated by the rope-barrier into the driveway, diverting the vehicle into the crash-barrier.

Abstract: A terrorist vehicle arresting system includes a rigid immovable crash barrier positioned at one side of a driveway and a turnstile having a circular sector positioned at the other side of the driveway in such a manner that upon entrance of an unauthorized vehicle through a corresponding gate across the entrance of the driveway, means are provided to rotate the turnstile such that the turnstile deflects the vehicle into the crash barrier. In a further embodiment, two opposing turnstiles are used to wedge an oncoming vehicle therebetween. In one embodiment, the terrorist vehicle arresting system includes a rope-barrier attached to an elevating and lowering mechanism on one side of the driveway and is attached at its other end to the turnstile, such that upon the unauthorized attempted entrance and the striking of the rope-barrier, the turnstile is rotated by the rope-barrier into the driveway, diverting the vehicle into the crash-barrier.

Abstract: A terrorist vehicle arresting system includes a crash barrier positioned at a side of a driveway instead of across the driveway; a gate across the entranceway which is dislodged by a vehicle coming through the closed gate; a net pulled out by the dislodged gate which captures the vehicle; a capstan to pivot a captured vehicle into the barrier; and cables from the net looped around the capstan, such that the netted vehicle is swung into the barrier where it comes to rest blocking the driveway. The impact-force is therefore redirected from the direction of the driveway, and the kinetic energy is dissipated upon impact with the offset, rigid barrier, thereby permitting the gate structure to be made light, aesthetically attractive, and quickly closed since the gate does not have to bear any substantial load.