Impact attenuating body

An impact attenuating body arranged for engagement by vehicles or other objects moving in a generally selected direction of travel, the impact attenuating body being adapted for gradually arresting motion of the object and dissipating its impact energy, comprising

• collapsible frame means comprising a plurality of spaced members forming multiple rows of vertically arranged compartments therebetween, selected compartments being spaced laterally apart from each other in transverse relation to the travel direction and being generally void, each said void compartment having a length parallel with the travel direction substantially greater than its width extending transverse to the travel direction, intermediate compartments between said void compartments containing shock absorbing materials selected to arrest movement of the object and dissipate its impact energy as the object travels a selected distance after initial engagement with the body, said void compartments being arranged in a pattern such that selected ones of the intermediate compartments are situated in front of respective selected ones of the void compartments in the selected direction of travel and selected intermediate compartments are supported by the respective member.

An impact attenuating body arranged for engagement by vehicles or other objects moving in generally a selected direction of travel, the impact attenuating body being adapted for gradually arresting motion of the object and dissipating its impact energy, comprising

• collapsible frame means comprising a plurality of spaced members forming multiple rows of vertically arranged compartments therebetween, said rows of compartments being formed in transverse relation to the travel direction, said compartments each having a relatively elongated cross-sectional dimension parallel with the travel direction, said compartments in each row comprising a plurality of first compartments characterized by a higher degree of shock absorption and a plurality of second compartments characterized by a lower degree of shock absorption whereby movement of the vehicle is arrested as the vehicle travels a selected distance after initial engagement with the body, said arrangement and cross-sectional shape of said compartments selected such that selected ones of the first compartments are situated in front of respective selected ones of the second compartments in the travel direction.