An earlier investigation of frontal collisions revealed the facts that offset collision is the most common type and that among injured belted car occupants serious injuries (AIS 3+) to the lower extremities are more frequent than injuries in the upper torso and head region. When attempting to estimate the overall significance of these injuries including injury induced societal costs, we realized that equally coded injuries (AIS 3) obviously have to be assigned widely differing numbers in terms of treatment period, temporary disability, and permanent impairment. To provide the automobile engineer a better tool for cost/benefit analyses, the AIS should be revised with respect to these criteria or an additional cost related scaling system should be developed.