Automobiles are the 4th most common cause of death. Given that the first three are heart disease, cancer, and stroke its the most preventable of deaths. Automobile deaths happen to ages across the spectrum moreso than the top three.
IMHO, that is why we need to re-vamp our automobile system. Automated cars would save lives, let you watch tv or surf the web when traveling, and get you to your destinations faster. Sadly, its going to be a long time (or never) until that happens.