
Cycling offers countless benefits that touch every aspect of our lives—personal, social, and environmental. It’s an eco-friendly, cost-effective, and even faster mode of transportation, particularly in urban centers. Yet, until bicycles are fully integrated into traffic systems, accidents remain a significant concern. To mitigate these risks, it’s crucial to understand the most common cycling accidents, why they happen, and how to prevent them. Additionally, we’ll discuss what to do if you’re involved in a cycling incident.
What Are the Most Common Types of Cycling Accidents?
The majority of cycling accidents involve collisions with motor vehicles, and incidents where cyclists hit open car doors are also quite prevalent. Let’s delve into how these accidents typically occur and explore strategies to avoid them.
1. Motorist Turning Across Cyclist's Path
This is the most frequent type of accident involving cyclists. It happens when a vehicle turns at a junction and crosses the cyclist’s path, often ignoring the cyclist’s right-of-way. Often, the cyclist is riding alongside the vehicle, usually on its left side. The driver might overlook the cyclist due to a blind spot, insufficient vigilance, or unfamiliarity with the road layout. Larger vehicles like trucks and buses pose the greatest risk due to their extensive blind spots and wide turning arcs, which can trap cyclists even when they’ve braked.
2. Side Impact at Junctions
A side collision occurs when a vehicle exits a side road or intersection without acknowledging the cyclist’s right-of-way. This can happen even at traffic lights. Most commonly, it results from a lack of visibility, driver carelessness, or reckless behavior from one or both parties. Since cyclists are the most vulnerable participants, it’s imperative to exercise extreme caution, which we’ll discuss further in the safety measures section.
3. Accidents at Roundabouts
Roundabouts deserve special mention due to their high frequency of cycling accidents. These accidents often mirror the types mentioned earlier. A side impact may occur when a vehicle enters the roundabout without spotting the cyclist, while a crossing-over collision happens when a vehicle exits the roundabout without respecting the cyclist’s path.
4. Side Impact While Overtaking
Another frequent cycling mishap occurs both in cities and on rural roads, primarily due to vehicles failing to maintain the recommended 1.5-meter distance when overtaking cyclists. If this minimum distance isn’t observed, a pothole, a gust of wind, or some other variable can cause a collision—even if the vehicle doesn’t physically touch the cyclist. The turbulence generated by passing vehicles can also destabilize the cyclist, leading to falls.
5. Impact Against an Open Car Door
This accident occurs when a driver or passenger opens a car door without first checking for approaching cyclists. It can also happen with parked cars near bike lanes, causing cyclists to collide with the opened door. Such negligence makes these incidents difficult to predict, but we’ll outline ways to reduce the risks.
6. Rear-End Collisions
Rear-end collisions in the same direction of travel are the most common accidents for cyclists on A roads and are often fatal. Surprisingly, these accidents are most frequent on straight conventional roads and intersections, rather than urban areas. Contributing factors include poor visibility, excessive speed, driver inattention, and substance consumption. Although some external factors are unpredictable, cyclists can always take preventive steps, such as increasing their visibility and using advanced radars that alert them to nearby vehicles and their speeds.
7. Bicycle Collisions with Other Vehicles
While less frequent than the aforementioned incidents, accidents involving bicycles colliding with other vehicles do occur. This can happen when:
- A cyclist runs into a parked or stationary vehicle due to inattention or improper parking.
- A cyclist hits a vehicle that abruptly brakes, often due to inadequate safety distances maintained by the cyclist.
Cyclists must follow road safety regulations and stay vigilant. Cyclists can face fines and legal repercussions, including civil and criminal liability, if they are deemed responsible for an accident. A classic example of this liability, though thankfully rare and generally harmless, involves accidents involving bicycles mounted on roof racks passing under low bridges or garages.
Where Do Most Cycling Accidents Happen?
Urban roads, especially in large cities, see the highest number of accidents due to dense traffic and a higher cyclist presence. Naturally, accidents are more frequent where roads are shared or bike lanes aren’t separated. However, the most severe cycling accidents, with the highest fatality rates, concentrate on rural A roads, despite the overall accident percentage being lower. Therefore, extra caution is essential in these environments.
When Do Most Cycling Accidents Occur?
Several factors influence the timing of accidents:
- Summer sees a significant rise in the number of cyclists, resulting in more accidents compared to winter.
- Weekends throughout the year experience more accidents than weekdays, particularly during summer weekends and early mornings when many return from parties or events.
- At dawn and dusk, reduced visibility increases the likelihood of accidents, especially involving vehicle collisions.
How to Prevent Cycling Accidents?
While some external factors remain unpredictable, the risk of accidents can be significantly minimized through adherence to safety measures and guidelines.
What factors increase the danger for cyclists? Poor visibility, driving habits, and disregard for regulations play key roles. We’ll highlight these areas.
1. Increase Your Visibility
To avoid accidents, ensure you’re visible to other road users, particularly motorists. Using lights, reflectors, and reflective elements effectively is crucial. Always comply with local traffic laws regarding bike lighting and visibility gear.
In the UK, any bicycle ridden between sunset and sunrise must have the following:
- Front white light. Can be steady, flashing, or a combination.
- Rear red light. Can be steady, flashing, or a combination.
- Rear red reflector, even if a rear light is present, to maintain constant visibility.
- Amber/yellow pedal reflectors, front and rear on each pedal.
While not mandatory, wearing a reflective garment is advisable. A vest is ideal, but other reflective accessories work well too.

We recommend using lights for all rides, day or night, and enhancing visibility with light-colored clothing and accessories like helmets and shoes.
For more details on choosing cycling lights, refer to this article.
2. Monitor Your Surroundings and Protect Yourself
Constantly monitoring your surroundings and understanding the movement patterns of other vehicles is vital. Rearview mirrors are invaluable for urban and highway riding, allowing safe maneuvering and avoidance of risky situations. Various radars are available to warn you of approaching vehicles and their speeds, helping you anticipate potential dangers and take preemptive actions.

Even with these precautions, wearing protective gear remains prudent in case of an accident.
What are the most common cycling injuries? Injuries to the back, neck, and head are the most prevalent. Thus, protecting these areas enhances safety. Protective gear varies based on cycling discipline; mountain biking requires different protection than road or urban cycling. However, investing in a high-quality helmet is non-negotiable.
3. Follow the Rules
A bicycle is simply another vehicle, and for your safety and respect from drivers, cyclists must adhere to all traffic regulations, especially those specific to cyclists. Cyclists are subject to the same restrictions as drivers, such as avoiding alcohol or drug use and refraining from using headphones, cell phones, or other electronics.
4. Use Bike Lanes Whenever Possible
Whenever feasible, opt for bike lanes, especially those segregated from roadways. In practice, however, bike lanes are not always usable due to impractical designs, especially for road bikes, or because they’re occupied by pedestrians, making them unsafe. If bike lanes aren’t an option, prioritize streets with lighter traffic.

5. Ride Correctly in Different Road Environments
On A roads, cyclists should ride on the hard shoulder whenever possible. If you must occupy the roadway, stay as close to the side as possible. Two cyclists can ride abreast unless visibility is obstructed (curves, fog, etc.) or if doing so impedes traffic. On dual carriageways, you can ride on the hard shoulder unless prohibited. Bicycles are never permitted on motorways.
In urban areas, the regulations differ:
- Ride in the center of the lane and always in the leftmost lane. Urban areas rarely have hard shoulders, and staying on the left isn’t mandatory for several safety reasons:
- Moving to the left might encourage drivers to overtake without maintaining adequate distance, as most urban lanes are narrow.
- Staying too close to parked vehicles risks collisions with open doors or vehicles pulling out.
- Riding in the center of the lane improves visibility at intersections.
- Change lanes only when necessary to turn right or overtake slower vehicles.
- Avoid riding between lanes, as this is the most hazardous position for cyclists. Stay in the center of one lane until it’s safe to switch to another.
At roundabouts, cycle like other vehicles, occupying the appropriate lane by staying in the center to avoid unnecessary overtaking and to increase your visibility to incoming traffic. Exercise extreme caution, as roundabouts are a hotspot for cyclist accidents. Try to make eye contact with drivers before entering—they might not have seen you if they don’t respond. If unsure whether a vehicle is slowing down, brake if needed. Giving up priority is always safer than risking an accident.
If cycling in a group, once the first cyclist enters the roundabout, the entire group gains priority over other vehicles, provided they ride together. The first cyclist must still follow the standard entry rules.
6. Signal Clearly and Ride Predictably
Avoid sudden maneuvers that could surprise drivers. Warn others of your intentions using hand signals, which are part of the highway code and internationally recognized. An outstretched arm indicates a turn or directional movement. A right-angle arm with an upward hand signifies a turn in the opposite direction. Flapping your outstretched arm signals braking.

7. Avoid Blind Spots
Drivers often can’t see cyclists in their rearview mirrors, especially with larger vehicles like vans, trucks, or buses. It’s critical to exit these blind spots as soon as possible, especially when vehicles are preparing to turn.

8. Trust Your Instincts
In uncertain situations, take extreme precautions, including yielding your right-of-way. As noted with roundabouts, it’s always safer to give up priority than risk an accident.
What to Do After a Bicycle Accident?
Knowing how to respond after a cycling accident is essential. If you’re the victim, besides the administrative or criminal liabilities imposed on the driver, you’re entitled to compensation for injuries and material damages to your bicycle and any equipment at the time of the accident.
After receiving medical attention, the next step is to file a report and contact your insurance provider or a specialized attorney. If there are severe injuries or, unfortunately, a cyclist’s death, medical services will report the incident to authorities.
Once the driver is reported, legal proceedings may ensue, potentially leading to out-of-court settlements with insurers or court trials where judges determine responsibilities and compensation amounts based on injury severity and long-term effects. Consulting specialized lawyers is always recommended in this process.
If you, the cyclist, are responsible for the accident, you’re obligated to cover compensation and may face administrative or criminal penalties depending on the damage. For this reason, although not required, we strongly recommend taking out insurance for your cycling activities, covering your own damages and, especially, civil liability. These benefits are often included in cycling club memberships and offered by various insurance providers.
Summary
Respect traffic rules but don’t fear cycling. By following these recommendations, you’ll minimize the risk of accidents. Stay vigilant at all times and keep an eye on other vehicles. Anticipating their actions and reacting appropriately is your best defense.
In our Mammoth stores, you’ll find professional advice and all the recommended accessories to boost your safety.
For more information, check out related articles and videos:
- The benefits of cycling
- How to choose bicycle lights
- Cycling and road safety
- Visibility when cycling
- Bicycles vs Cars: Which is fastest in the city?
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