Has anybody considered the effect that the new daylight saving time will have on your commute next Spring? Right now for me the two times with the latest civil twilight are right now, (late Oct.) and late Dec.-early Jan. At those times I ride for about 1 hour in total black.
Civil twilight at these two worst times is right around 7:45 AM CDT. Now when the time changes early in March it will mean yet another late civil twilight season. After the time changes in spring, I will be right back to 7:45 AM sunrise.