Are There More Car Accidents or Motorcycle Accidents?
Cars are involved in far more road traffic collisions than motorcycles in the UK, but motorcyclists face dramatically higher risk per mile travelled. Department for Transport figures from 2025 show motorcyclists are around 50 times more likely to be killed per mile than car occupants.
Raw numbers can be misleading because there are around 34.5 million cars on UK roads compared to roughly 1.4 million motorcycles. Motorcycles account for less than 1% of traffic but made up 25% of all road deaths in 2025, according to DfT road casualty statistics.
Understanding this disparity matters whether you’re choosing car insurance or a motorcycle policy. It also explains why premiums differ so much between the two vehicle types.
Cars are involved in far more collisions simply because there are 34.5 million of them against 1.4 million motorcycles. Per mile travelled the picture reverses completely: motorcyclists are around 50 times more likely to be killed, and they accounted for a quarter of all road deaths in 2025 while making up under 1% of traffic. The single biggest cause is drivers failing to see them.
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How do car and motorcycle accident numbers compare?
In 2025, 1,538 people died on Great Britain’s roads, with motorcyclists accounting for 386 of those deaths despite representing just 1% of total traffic. Car occupants were the single largest group, but motorcyclists were the most overrepresented relative to their share of road traffic.
What do the raw numbers show?
Cars dominate absolute collision figures because they make up over 80% of the vehicle fleet. Most car incidents are minor bumps, parking scrapes, and low-speed collisions that rarely cause serious injury.
Motorcycle incidents are far less common in total but disproportionately severe. In 2024, motorcyclists represented 21% of road deaths, rising to 25% in 2025 as motorcycle traffic grew to 3.0 billion vehicle miles.
How does the per-mile risk compare?
Adjusting for distance travelled reveals the true scale of the disparity. In 2025, the motorcyclist fatality rate was 128 per billion vehicle miles compared to around 2.4 for car occupants.
That means a motorcyclist covering the same distance as a car driver is around 50 times more likely to be killed. No other common vehicle type comes close to this gap.
| Metric | Car occupants | Motorcyclists |
| Fatalities per billion miles (2025) | ~2.4 | 128 |
| All casualties per billion miles (2024) | 274 | 5,408 |
| Share of road traffic | ~79% | ~1% |
| Share of road deaths (2025) | ~43% | ~25% |
Why are motorcycle accidents so much more severe?
Car occupants sit inside a steel frame with crumple zones, airbags, and seatbelts, while motorcyclists absorb impact directly with their body. This lack of structural protection is the single biggest factor behind the severity gap.
How does vehicle design affect outcomes?
Modern cars are engineered to absorb crash energy before it reaches occupants. Front and rear crumple zones, side-impact bars, curtain airbags, and electronic stability control all work together to reduce injury severity.
Motorcycles offer none of this structural protection. Some riders wear airbag-equipped jackets, but these provide limited coverage compared to a car’s integrated safety systems.
| Protection feature | Cars | Motorcycles |
| Steel safety cage | Yes, surrounds occupants | None |
| Crumple zones | Front and rear absorb impact | None |
| Airbags | Multiple (front, side, curtain) | None (limited airbag jackets exist) |
| Seatbelts | Standard | None |
| Electronic stability control | Standard on modern cars | Available on some models |
What types of injuries are most common?
Head injuries, spinal injuries, and multiple fractures dominate serious motorcycle casualties. A collision at 30 mph that a car occupant might walk away from can cause life-changing injuries to a rider.
This severity difference drives both the human cost and the financial cost of motorcycle claims, which is why motorbike insurance premiums reflect this higher risk.
What causes most car and motorcycle collisions?
Failure of observation by car drivers is the single biggest factor in motorcycle fatalities. DfT data shows ineffective observation was a contributory factor for 68% of non-motorcyclist drivers involved in fatal and serious collisions with motorcycles.
Why do car drivers miss motorcycles?
Motorcycles are smaller, narrower, and harder to spot than cars, particularly at junctions, roundabouts, and during lane changes. The Highway Code reminds drivers to look specifically for motorcycles at these points.
This ‘looked but failed to see’ problem is so persistent that it accounts for more motorcycle deaths than any rider-related factor, including speed.
What role does rider behaviour play?
Travelling too fast for conditions was a contributory factor in 19% of motorcyclist fatalities and serious injuries. Younger and less experienced riders are overrepresented in these statistics.
Rider inexperience contributed to 16% of fatal and serious motorcycle collisions. Rural roads, where 70% of motorcycle deaths occur, demand particular skill and caution.
How does this affect car and motorcycle insurance costs?
Insurers price premiums based on claim severity, not just frequency. Because motorcycle claims involve more serious injuries and higher payouts, motorcycle cover typically costs more than equivalent car insurance.
Why are motorcycle claims more expensive?
A motorcycle accident is more likely to result in hospitalisation, long-term rehabilitation, and permanent disability than a car accident. These costs drive higher premiums even though motorcycles have fewer total claims.
Car insurance claims are more frequent but generally less expensive individually. Minor bumps, parking scrapes, and windscreen damage make up a large proportion of car claims.
Can technology help reduce premiums?
Black box insurance rewards safe driving with lower premiums by tracking speed, braking, and cornering. This technology is increasingly available for both car drivers and motorcyclists.
Advanced rider training, security devices, and choosing the right level of cover can all help bring down what you pay.
What can you do to stay safer on the road?
Both car drivers and motorcyclists can take practical steps to reduce collision risk, and better driver observation alone would address the leading cause of motorcycle fatalities.
Road safety charity Brake emphasises the importance of drivers looking specifically for motorcycles at junctions. This single change in driver behaviour could prevent the most common type of fatal motorcycle collision.
Tips for motorcyclists
- Wear full protective gear including a well-fitted helmet, armoured jacket, gloves, and boots
- Ride defensively and assume other road users haven’t seen you, especially at junctions
- Complete advanced training beyond the minimum CBT and test requirements to build real-world skills
- Avoid riding in poor conditions where wet roads and low visibility increase risk disproportionately for two-wheeled vehicles
Tips for car drivers
- Look specifically for motorcycles at junctions, roundabouts, and before changing lanes
- Check mirrors before opening doors as dooring is a serious risk for motorcyclists in urban areas
- Allow extra following distance since motorcycles brake differently and need room to manoeuvre around road hazards
- Don’t underestimate approach speed because motorcycles accelerate faster than they appear to from a distance
Frequently Asked Questions (FAQs)
Yes. DfT data from 2025 shows motorcyclists are around 50 times more likely to be killed per mile travelled than car occupants, primarily due to the lack of structural protection.
In Great Britain, 386 motorcyclists were killed in 2025, up 14% from 340 in 2024. Motorcyclists accounted for approximately 25% of all road deaths despite making up just 1% of traffic.
Cars are involved in far more total collisions because they make up over 80% of the vehicle fleet, but the key difference is severity. Motorcycle accidents are far more likely to result in serious injury or death.
Insurers price based on claim cost and severity, not just frequency. Motorcycle claims tend to involve serious injuries requiring long-term treatment and higher compensation, which pushes premiums above car insurance.
Failure of observation by car drivers is the most common contributory factor in collisions involving a motorcycle and another vehicle. However, speed and rider inexperience also play a role in some crashes.
The motorcyclist fatality rate per billion miles has fallen 31% since 2004. However, total deaths rose to 386 in 2025, partly because motorcycle traffic increased to 3.0 billion miles.