What to do if you come across an injured rider

Injured Rider

As cyclists, we all accept that there is a risk of injury when we ride. Nobody wants to get injured, of course, and by the same token, no one wants to see a fellow cyclist get injured while out riding. But chances are you’ll be first on the scene during a cycling accident at some point in which case it makes sense to be prepared.

So, what should you do if you come across a fellow rider (or someone else) that’s been injured? Emergency doctor and cyclist Dr Carl Le has put together the following guide. Please note that the following constitutes Dr Carl’s personal thoughts on the subject and may not be applicable to your situation. All advice should be considered as general advice only.

Whether it’s climbing a 12% gradient at 9km/h, descending at 90km/h, or cruising along in a peloton at 50km/h there is always that unfortunate risk of a rider falling off their bike. With learned experience, we all constantly assess the risks and scan for hazards as we ride. Sometimes, however, accidents can and do happen.

So what should you do if you come across an injured rider or riders? It may sound very simplistic, but my approach to this question is the good old DR ABC. I use this all the time when I’m working on a race track (as the lead doctor for the V8 Supercars Championship) and this is what I still teach regarding first intervention to any racing incident.

As simple as it sounds, there’s a good reason why DR ABC has stood the test of time when it comes to first aid.

Of course, if there is someone else present at the scene of an accident who has first aid or medical training, you should let them lead and assist where and when possible. But assuming you’re the only one there, here’s how to proceed.


Lets go through the steps:

D (Danger)

If the scenario is dangerous to either the injured person(s) or yourself, you need to make it safe before doing anything else. For example, if the injured person (e.g. rider, pedestrian) is on a road with traffic, your priority should be to ensure traffic isn’t an issue. This may involve:

  • Slowing or controlling traffic.
  • Positioning your bike (upside-down) or car in a position to draw attention and/or to protect the scene.
  • Use a car’s hazard lights and or other people to warn traffic of the incident to assist with the above.
  • If the above is not possible, you may need to move the injured person and yourself to a safe position.

This final point should also answer the common question of whether or not you should move an injured person. Quite simply, you should move an injured person if there is danger to them or yourself. Importantly, if you’re going to move an injured person, try to immobilize the spine from head to bottom as much as possible.

Injured Rider

Image: Mike Renland/Flickr

Next you should decide whether or not to call 911 (or the relevant emergency number if you’re outside the U.S.). Ask yourself:

  • Does the injured person(s) need higher-level, urgent medical care?
  • Do they need ambulance transport to an emergency department?
  • Do the police need to be involved?

Lastly, consideration of ‘Danger’ may also involve avoiding the hazard yourself – i.e. don’t become a patient as well! For example, was there debris or oil on the road that caused the initial crash, that you (and/or other riders) need to avoid?

There was an incident in 2013 in the Otways National Park where a rider was electrocuted by a fallen power line across a track. One of the riders who found him reportedly also received an electric shock. Don’t let that happen to you! In general, don’t put yourself in danger in trying to help someone else.

R (Response)

Check to see if the injured person is conscious. An unconscious person implies a more serious incident and someone that is at risk of further injuries. An unconscious person should not be moved unless the ‘Danger’ imperative overrides the risk of further injury. Again, the spine from head to bottom should be immobilized as much as possible when moving such an injured person.

A conscious person can be more safely moved away from danger as they can help splint any injured parts themselves. Clearly it is better to move away from a road when possible.

A (Airway)

Check that there is nothing obstructing the person’s airway (e.g. chewing gum, energy bars or broken dentures). Remove anything that is causing or may cause an obstruction. Consider placing the patient into the ‘Recovery position’: facing downwards and slightly to the side, supported by their bent limbs.

Injured Rider

This will help keep an unconscious patient’s airway open.

B (Breathing) and C (Circulation)

Check that the person is breathing and that they have a pulse. If they do not, then you should start Cardio-Pulmonary Resuscitation (CPR). This may involve chest compressions and ‘mouth to mouth’ resuscitation.

To learn more about CPR and more, I highly recommend doing a first aid course (see below).

Multiple injured persons

Bear in mind that if you’re faced with a situation where you’ve got multiple injured persons, the person(s) making the most noise may not need the most urgent attention. It is the silent, unconscious injured person(s) that should be attended to first.


As well as knowing how to react when someone’s been injured, there are also a handful of preventative measures you can take.

First-aid training

First aid training is offered by many different providers. The American Red Cross offers classes starting at fewer than $100.

ICE (In Case of Emergency)

Imagine that you are the unconscious person that is found. How would the rescuer know who you are, who your emergency contact is, and what medical conditions you may have? You should have all of this information easily available.

Injured Rider

Some commonly-used ICE solutions include bracelets or cards in a wallet/jersey pocket. iPhone users (or if you find a person with an iPhone) should check out the Medical ID function that is accessible on devices with iOS 8 even when the phone is locked.


Do you carry a first aid kit with you on your bike? Should you? My answer is that you should plan to have access to a first aid kit when you head out for a ride. Whilst a serious injury may necessitate calling for an ambulance, you should be able to deal with cuts and grazes yourself.

You should consider where you are riding, whether it is in a suburban area (where pharmacies and doctors are accessible) or up in the mountains (far away from medical assistance). I always ride with a small first-aid kit in my jersey pocket. This is simply a small sandwich bag with adhesive dressings of various sizes and a three-inch bandage.

Injured Rider

If riding in a group in the mountains, it may be worth taking more supplies (e.g. triangular bandages, space blankets, different sized crepe bandages, more adhesive dressings, and even some antiseptic, spread amongst the group.

As a doctor, I also feel that if I came across an injured rider, I would want to be able to offer some medical assistance. This is another reason I carry a first aid kit with me and I’ve had to use it for this very purpose.

In 2014, I came up with an idea that evolved to become “Cycling Karma”. It was a simple idea to give back to the cycling community for the joy that I get from cycling. With the support of some companies and friends, I have put out over 200 inner tubes, and four first aid kits along popular routes near me. These are for anyone to use as needed.

If you have a regular climb or ride, an option for you might be to leave your own first-aid kit somewhere that you and friends know and can access should the need arise.

Planning ahead

It might sound obvious, but you should always let someone know where and when you are riding, and when you should be back. And if you’re riding in a remote area, do some research to find out if mobile phone coverage is available.

Thanks to CyclingTips and Dr. Carl Le for the content.