I tossed this in here. Maybe it needs its own category. Those who are qualified - please add to this thread. I am EMR trained, a first aid instructor, (including wilderness first aid) and work with search and rescue. I am constantly amazed at how much I don't know (and still am trying to learn) about emergency management. I also am constantly scared shitless at what is put on the web as factual information (usually hearsay other myths), and will probably get someone killed.

Question is what you need to prepare to handle an accident on the road in terms of supplies and actions.
Here is some basics for a start. I will add more to this post when I get time. Hopefully so will others who are qualified to do so.

Actions at an accident scene:
1) Secure the scene. Some one needs to do this quickly. The greatest danger after an accident has happened on a roadway is from oncoming traffic.
Traffic needs to be warned that there is a hazard at least 100 meters on either side of accident scene in a high speed zone (remember: they need time to comprehend and then to slow down. Place hazard markers. Station someone at either end to control traffic if possible. If there is another vehicle, place it next to the accident scene, blocking that lane off and providing protection for the rescuers working there. Make the traffic go around the scene, not through it.
2) check the bike, and anthing else involved, is no-longer a hazard to anyone (like you). Stabilize the vehicles and everything else before climbing in or on.
3) check the casualty. Don't move them. Assume head/injury. Do your ABC'S (airway, breathing, circulation). Control bleeding.
4)Call for help (if someone already hasn't). Make sure they understand what the accident involves. As example, I've see accidents where the 911 call didn't include the fact that one of the injured was TRAPPED in the car. The amublance arrived 45mins later and then had to call for further assistance from an extraction team. That took another 45 min. to an hour to arrive.
5) if the patient is conscious, get a history (signs, symptoms, allergies,meds, medical conditions, last meal, etc. Basic first aid stuff - take the course.). The hospital will need that information.
6)Don't get creative. First aid means keep them alive untill the medical team arrives. Forget what crap you saw on TV. This is real. Take a certified first aid course - better yet; take a emr course. Best two week investment you can make before going on a real trip. Do not try anything you haven't been trained to do and are certified to do. It's called "scope of practice". If all you are qualified to do is basic first aid, then that's all you do. Period. Creative good intentions kill people needlessly.
7)make sure you have a plan to communicate for help if you need it. What ever it takes: cell phone is nice (if it works in the area you are going into), satellite phones are better if you can afford that (I can't), flares, smoke signals (I am kidding) someone going for help, - what ever it takes. Almost forgot. Make sure you know where you are. Sending for help is so much better when they know how to find you.
8)The basic medical supplies aren't much - just well thought out. The training and skill sets are far more important.
9) last note for the moment - helmets - don't take off unless you have to, and if you have to, make goddamn sure you know how to do it properly (take a course).

Peace,
Narly