Last fall there was a long period where the morning temperatures were just above freezing. I'd ride wearing a black base layer and black gloves. One day while signaling a turn, I thought to myself: "I doubt anyone can even see my arms".

Putting some reflective tape on the back of my gloves would probably help.
or installing a flux capacitor: http://at.movingdesign.com/calltoact...signal-gloves/