Where we engineered to make cars safe when used right, we also have to engineer to make cars safe when used wrong. This, however, the automobile industry failed to see.
Make cars idiot-proof and drunk-proof. Once again, education is not the most effective answer. The real problem was the Pareto distribution of those who cause accidents. 5% of drivers (clumsy, drunk, etc.) will never be helped by big flashy education and training programs, yet they cause 75% of accidents. Only engineering controls will be effective.