I always seem to be coming home into the Sunset, living near the West Coast I suppose, and I recall about 3 years ago riding with my Dad on upwrongs when I stopped to do something about a bag strap that was clicking my spokes. Caught up with Dad a few minutes later at the roadside with a woman saying she had hit him from behind as they were driving into the sun and she didn't see him. I can't see how car drivers can avoid that situation to be honest.