Sports Illustrated is not known for its massive coverage of the world of cycling. In fact, if it weren't for Lance Armstrong and Greg Lemond, I doubt that the words "Tour de France" would have made it into the magazine in a whole phrase like that without being accompanied by sarcastic commentary from some isolationist cretin who doesn't know that there are, actually, sports outside the US.
With that jab extended, I will now call your attention to SI's Austin Murphy and his extraordinarily fine column on the SI web page about the deaths of Matt Peterson and Kristianna Gough at the wheel of a Santa Clara County deputy sheriff, near Cupertino, CA. I won't go into the details of the accident as you can get that info elsewhere.
Murphy, though, looks further than the single incident and at the culture of the excuse "I didn't see you!"
As I've said in the past, that's not a valid excuse.
Motorists absolutely need to realize that their negligence to check around them before moving in their cars can and frequently does end in the death or injury of those around them, particularly those on bikes or on foot. The fact that motorists so frequently use this excuse simply shows that they aren't taking enough time to make sure that the way is clear before changing lanes, turning, etc.
With gas prices on the rise, congestion worse than it's ever been, and the potential for smaller and smaller supplies of oil available for our use, more people are going to be cycling for transportation all the time. Drivers need to be aware of this, and take action to make sure they're not endangering their friends, family, neighbors, etc., with their inability to check the space around them.
People, not speed.