I wear a road ID most days, even when not riding. I got one after trying to get emergency contact info from a guy I was rendering aid to and due to shock, couldn't recall any contact numbers. (Not a bike crash)

I figured it could be me. I went road ID because they could engrave more info than on on a dog tag. I have enough info for LE to get a positive ID and three emergency contact numbers. I have a second tag I keep in my luggage for travel.