Head-light - taillight analyses from collision research.

This paper present the classifications of automobile light bulb filament changes brought about by collision, and the significance of such changes. Filaments removed from vehicles involved in UCLA's full-scale collision experiments provide calibrated references of colision-induced changes in filaments under know "on " or "off "conditions of lights at the time of impact. For the collision investigator procedural suggestions concerning the status of vehicle lights are also included.