I drive along a long stretch of flat road that I share with traffic. I was so unnerved by all the trucks and speeding cars coming up from behind that I got a mirror. It's probably not going to save me if a car/truck was coming right up to hit me, but at least I can feel better that I can see behind me to see what's happening in general.

I know it's tragic that a cyclist lost his life, but I also feel bad for the driver; he has his whole life ahead of him knowing that he's killed someone due to inattention.