The core safety practices that prevent most bicycle injuries
Most bicycle injuries come from falls, collisions with cars, and loss of control — and most of those happen because riders skip a few basic steps. Wearing a helmet cuts your risk of head injury by half. Using lights and reflectors when it is dark makes you visible to drivers. Checking your brakes and tires before each ride catches problems before they cause a crash. Riding predictably — signalling turns, staying in a straight line, and following traffic rules — means drivers can see what you are about to do.
The difference between a safe ride and an unsafe one is not luck. It is the same five or six habits, done the same way every time.
Key Takeaways
- A helmet must fit snugly on the top of your head, with the strap buckled under your chin, and should be replaced after any crash.
- Check your brakes, tires, and chain before each ride by squeezing the brake levers, spinning the wheels to listen for rubbing, and looking for rust or damage.
- Ride in a straight line, signal all turns with your arm, and obey traffic lights and stop signs the same way a car would.
- Use a white light on the front and a red light or reflector on the back when riding in low light, and wear bright or reflective clothing so drivers see you.
- Stay off sidewalks in busy areas, ride with traffic rather than against it, and keep both hands ready to brake.
Helmet fit and replacement
A helmet only works if it stays on your head during a crash. The helmet should sit level on your head, covering your forehead, and should not rock forward, backward, or side to side when you move your head. The front edge should be one to two finger-widths above your eyebrows. Tighten the chin strap so you can fit one finger between the strap and your chin — any looser and the helmet can slip off.
Replace your helmet after any crash, even if you cannot see damage. The foam inside absorbs impact by crushing, and once crushed it cannot protect you again. If you have hit your head or the helmet has hit pavement, buy a new one. A helmet costs thirty to one hundred dollars; a head injury costs far more.
Pre-ride checks for brakes, tires, and chain
Before you ride, squeeze each brake lever hard and feel whether the brake pads grip the wheel rim or disc. The lever should not go all the way to the handlebar. If it does, your brakes are too loose and will not stop you in an emergency. Spin each wheel and listen for rubbing or grinding — if you hear it, the wheel is bent or the brake is misaligned, and you should not ride until it is fixed.
Look at each tire for cuts, bulges, or missing rubber. Press your thumb into the tire; it should be firm, not soft or squishy. If the tire is flat or nearly flat, pump it up. Check the chain by running your finger along it — it should be clean and oiled, not rusty or dry. A rusty chain can snap, and a dry chain will slip off. If the chain looks bad, clean it with a rag and explore chain oil.
These checks take two minutes and catch ninety percent of the problems that cause crashes.
Signalling, visibility, and predictable riding
Signal every turn by extending your left arm straight out for a left turn, or your right arm straight out for a right turn. Hold the signal for at least two seconds so drivers have time to see it. Do not signal and turn at the same time — signal first, then turn. Ride in a straight line and avoid sudden swerves, which confuse drivers and can cause collisions.
Wear bright clothing during the day and reflective clothing at night. A reflective vest or jacket is more visible than reflective tape alone. Use a white light on the front of your bike and a red light or reflector on the back when riding in dim light, dusk, dawn, or darkness. Lights must be visible from at least 500 feet away. Blink lights are more noticeable than steady lights, but steady lights are easier for drivers to judge your speed and distance.
Ride with traffic, not against it. Stay in the right lane or shoulder, and do not weave between parked cars. The more predictable you are, the easier it is for drivers to avoid you.
Road positioning and avoiding common crash scenarios
Stay off sidewalks in busy commercial areas, where drivers do not expect to see cyclists and often pull out without looking. On a quiet residential sidewalk, riding is usually safer than riding in the street. On a road with a bike lane, use it. On a road without a bike lane, ride three to four feet from the edge so you have room to swerve around potholes and debris without falling into traffic.
Watch for car doors opening into your path. Ride far enough from parked cars that an opening door will not hit you. At intersections, assume drivers do not see you — even if you have a green light, look both ways before crossing. Slow down before entering an intersection, not after, so you can stop if a car runs the light.
Keep both hands on the handlebars and ready to brake. Do not ride with one hand, text, or wear headphones that block traffic noise. You need to hear horns, sirens, and approaching cars.
Night riding and low-light conditions
Riding at night is riskier than riding in daylight because drivers have a harder time seeing you. Use both a front light and a rear light, and make sure both are bright enough to be seen from at least 500 feet away. A front light should be white and aimed slightly downward so you can see the road ahead. A rear light should be red and visible from behind.
Wear reflective clothing or a reflective vest so your body is visible, not just your bike. Reflectors on your pedals and wheels make you more noticeable because they flash as you move. Ride slower at night than you would in daylight, because you cannot see hazards as far ahead. Avoid riding at night if you can; if you must, assume every driver cannot see you and ride accordingly.
Riding in traffic and around large vehicles
Stay out of the blind spots of large trucks and buses. A truck driver cannot see directly behind, to the sides, or in front of the cab. If you cannot see the driver's face in their mirror, they cannot see you. Never pass a truck on the right side, where the blind spot is largest. Pass on the left, and only when you have a clear view of oncoming traffic.
At red lights, do not pull up between a car and a truck, or between two trucks. If traffic starts moving and the truck turns, you will be crushed. Wait behind the vehicles or pull to the side of the road. When a truck or bus is turning, give it extra space — the rear wheels swing wider than the front wheels, and a rider in that path will be hit.
Make eye contact with drivers at intersections. If a driver is looking at you, they see you. If they are looking at their phone or the road ahead, assume they do not.
Frequently Asked Questions
Do I have to wear a helmet by law?
Helmet laws vary by state and sometimes by city. Some states require helmets for all riders, some only for riders under eighteen, and some have no helmet law at all. Regardless of the law where you live, wearing a helmet cuts your risk of serious head injury in half, so it is worth doing even if it is not required.
What should I do if a car hits me?
Move to safety if you can. Call 911 if you are injured or the car did not stop. Get the driver's name, phone number, address, insurance company, and license plate number. Take photos of the damage to your bike, your injuries, and the scene. Write down what happened while you remember it. Report the crash to the police and your insurance company.
Is it safer to ride on the sidewalk or in the street?
On a busy street with a bike lane, the bike lane is safest. On a busy street without a bike lane, a quiet sidewalk is usually safer. On a quiet residential street, the street is usually safer because drivers expect to see cyclists there. The safest choice depends on traffic volume and driver behavior in your area.
Can I ride with headphones or while using my phone?
You should not. Headphones block the sound of horns, sirens, and approaching vehicles, which you need to hear to stay safe. Using your phone takes your attention off the road and your hands off the brakes. Both significantly increase your crash risk.
What lights do I need for riding at night?
You need a white light on the front and a red light or reflector on the back. Both should be visible from at least 500 feet away. Blinking lights are more noticeable than steady lights. Some states require lights by law; check your local rules. Even where not required, lights are essential for being seen by drivers.