Originally Posted by wphamilton

Looking at ER data, the surprising answer is that even with all of the automobile safety features, the chances of an intracranial injury is about the same whether you're in the vehicle or on the bike. From a per-accident basis. By "about the same" I mean within an order of magnitude.

My own hunch is that I'm more likely to get hit by a car when I'm driving than when I'm riding. To my knowledge the risk of a serious head injury is approximately the same. So common sense tells me that I'd rather wear a helmet driving than riding.