I carry a photocopy of my ID and insurance card, my contact info, blood type, allergies, etc. on a bright orange index card in my seatbag. I have my name and "emergency info in bike seat bag" written on the inside of my helmet with a permanent ink marker. My helmet is always on my head and my seat bag is always on my bike...I never have to worry about forgetting to take my ID and info with me. This is a bargain basement approach to the "Road ID" idea