Sometimes the perceived need for high visibility jerseys may be effected by the terrain one rides in. I had a good ride today in an area relatively new to me on roads that just a bit busier than I normally ride. Here in the NE USA, even in populous areas, there is often a continuous forrest canopy. As a result I was in shade or moving between bright sunlight and shade. I did think about being visible and was glad to be wearing my "screaming yellow jersey.