I was in a serious accident five years ago. I was not carrying any sort of ID. I had to be airlifted from southern Maryland to DC to a trauma center the same day that Hurricane Isabelle hit. I was unconscious so obviously I couldn't tell them who I was. They had a hell of a time tracking down my husband. They also never, ever got the insurance information correct because my company was in another state and the insurance company was not the local, usual branch that they were used to dealing with. I don't think they ever got that straightened out.

I now carry a small clear plastic wallet with all of my medical info (blood type, allergies, etc.), contact information, insurance information, organ donor decision--in my jersey pocket, not in my seatbag. The medics really could care less about my bike, given that I was in such bad shape and had to get out of there fast (because of my broken head and the hurricane). I also carry a phone with me--in my pocket, not in my saddle bag. I did not have a phone that day. My riding buddy didn't either, and he had to wait a while for a car to pass as I was a lump on the side of the road.

I may get a RoadID. It's a good idea, but I'll still carry the additional information with me, too.