I rode a couple hundred yards this morning in heavy rain. I knew it was raining of course and wore my contact lenses and my excellent rain gear. But I wasn't expecting the heavy fog. My ability to see the road (and the wildlife on or near it) was so poor that I turned around and headed back home. An hour later I left in the car and the fog had lifted or been blown away.

I wasn't worried about the few drivers seeing me -- if our roads were reflective and had bright blinking tail lights I would have been able to see fine. As it was, 10 mph would have been pushing my sightline.