Originally Posted by the engine

I ride alone frequently ... no issues. The risks are the same. In daylight, more cars on the road, odds for accidents increase. Night riding, less cars, less chance for being run over. Decreased visibility at night may increase risk at night to balance the two ... I don't ride nearly the speed under lighting as I do in the daylight. I also use multiple rear lights with my reflective vest and ankle bands to increase my visibility.

I've been "night riding" for about 40 years ... still here. Maybe I'm just lucky.