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This paper describes a new generation anthropomorphic dummy with component dynamic responses which approximate available biomechanics data. This experimental test dummy, Hybrid III, is based on the ATD 502 dummy which was developed in 1973 by General Motors under contract with the National Highway Traffic Safety Administration. Like the ATD 502, Hybrid III features a biomechanically-based head design, human-like automotive seating posture, constant torque primary joints, and detailed documentation for fabrication. Hybrid III uniquely features a biomechanically-based neck, thorax, and knee covering. Transducers for measurement of neck loads and chest deflection are integral parts of the design. While Hybrid III appears to provide a measurable improvement over the present “standard” dummy (Part 572) in terms of component responses in frontal impacts, it is still far from the “ultimate” test dummy.