I was riding to work this morning at just a little later than the usual time (had a sick dog to deal with) and while riding past the firehouse on Diamond Drive, noted that the sun was at about 160 degrees behind me as it rose above the treeline. Thinking about that for a minute, I realized that meant that motorists pulling out of side streets and oncoming traffic would have the sun directly in their eyes when looking in my direction. That situation may intensify as the days get shorter.
Perhaps that is obvious, but I wonder how many crashes are caused by people not exercising situational awareness in realizing that the oncoming motorist making the left turn really, honestly, "didn't see you".
Be careful out there, and employ both mental (situational awareness and heightened observation) and physical (bright jerseys? forward strobe lights? etc.?) countermeasures.
Speaking of this topic, I went over this once before.