Over the past four years Minicars, Inc., has pioneered the development and application of lightweight but crashworthy vehicle structures. Outstanding results have been obtained by using light gage, foam-filled sheet metal sections. The feasibility of each structure for crashworthiness improvement was proven in the Subcompact Car Crashworthiness program for the National Highway Traffic Safety Administration (NHTSA). The practicality of such structures for production vehicles has been thoroughly investigated during the Research Safety Vehicle (RSV) program. The results of these studies indicate that light-weight crashworthy vehicle studies are a viable option of the 1985 time frame.