To be effective for the protection of light vehicle passengers, and in order to avoid the beginning of the "WEDGE EFFECT," rear underride guards must be, in addition to strong enough, placed at a maximum of 400 mm from the ground on an unloaded truck. This means a substantial reduction in the escape angle, which can create problems, THE LARGER THE OVERHANG EXTENSION, if the road presents obstacles that can hit the underride guard during normal traffic.

This means that when loaded, the final height of the cargo tray can be reduced even more, which means an additional reduction in the escape angle. It is, therefore, a GEOMETRIC OBSTACLE that cannot be disregarded.

OBVIOUS SOLUTION:

It is OBVIOUS AND IMPERATIVE that a geometric artifice be used, since 400 mm must be respected as the maximum height, in the name of human lives. Therefore, the underride guard structure must rotate backwards in order to not break the guard in collisions with the ground obstacles.

THIS KIND OF UNDERRIDE GUARD WAS THE FIRST BUILT AND SUCCESSFULLY TESTED BY THE UNICAMP "IMPACT PROJECT"! A PROTOTYPE HAS BEEN TESTED ON 30,000 KM OF UNPAVED ROADS BY MERCEDES BENZ DO BRAZIL.