An approach to developing underride guard requirements for improved occupant protection. Paper presented at the SAE Meeting held November 10-13, 1980.

To determine optimal performance characteristics for rear underride protection guard structures, a comparative engineering analysis was performed using a car crash simulation model with a variety of guard force deformation characteristics. From this analysis the risk of injury to occupants of passenger cars was determined based on excessive underride and collision forces imparted to the occupant.