And, there are a LOT of factors that make risk of accidents increase. For instance, I understand (do not have stats handy, but my brother, an insurance agent, told me) that people in the midst of divorce proceedings are much, much more statistically likely to be involved in car accidents. Having been divorced, I can thoroughly believe this.
I think there are probably a lot of factors that we need to look at as drivers, ourselves, if we want to be as responsible as possible behind the wheel. I mean, I know that I did not always call and ask for a ride, instead of driving myself, when I was upset about my divorce. Or when I was on the way to the hospital to see my Dad after he had pulled out all his IV's and tried to escape, or...(fill in other upsetting/distracting life circumstances).
"The best rides are the ones where you bite off much more than you can chew, and live through it." ~ Doug Bradbury