Human errors in traffic
Most traffic accidents are caused by human errors. Here you learn to distinguish between types of errors and what you can do to avoid them.
Around 90 percent of all traffic accidents** are caused by human error. Understanding what kind of mistakes we make and why is central to the risk understanding on the theory test class B.
Three types of misactions
| Type | Description | Example |
|---|---|---|
| Miss (lapse) | Unconscious error in an automated action | Forgetting to check the blind spot |
| Mistake | Deliberate action based on incorrect assessment | Think you’ll have time to cross before the car |
| Violation of the rules (violation) | Conscious choice to break the rules | Intentionally Exceeding the Speed Limit |
Slips and oversights
Slips happen everyone, regardless of experience. Typical examples:
- Forgetting to signal with turn signals
- Ignore a sign you would normally notice
- Stepping on the wrong pedal in a stressful situation
- Forgetting to check the blind spot when changing lanes
Slips increase sharply in fatigue , distractions and stress.
Misjudgments
Misjudgments occur when you make an active decision based on incorrect information or analysis:
- Underestimating the speed of an oncoming vehicle
- Think the distance to the pedestrian in the pedestrian crossing is safe enough
- Misjudges the stopping distance on wet roads
- Overestimating one’s own skills, especially common in young drivers
Deliberate rule violations
Rule violations are the most serious category because they involve a choice:
- Driving too fast because you are late
- Use your mobile phone behind the wheel
- Driving with blood alcohol level
- Ignore the duty to give way to save time
Many rule violations begin as “small things” that gradually normalize. It is called risk acceptance and is dangerous because it lowers the threshold over time.
How to reduce errors
- Drive defensively and expect that both you and others can make mistakes. See defensive driving .
- Keep a good distance so that you have time to correct. The Three-Second Rule gives margin.
- Drive refreshed and without distractions.
- Be humble.** Accept that you can be wrong, no matter how experienced you are.
- Use routines: mirror, gaze, signal, maneuver, always in the same order.
Systems thinking and the zero vision
Vision Zero recognizes that human error can never be completely eliminated. Therefore, the road system must be built so that faults do not lead to death or serious injury. Your contribution is to keep the speed down, follow the rules and be aware.
Further reading
Read next
More in Class B course
Accidents involving vulnerable road users
Special procedures and considerations for accidents involving pedestrians and cyclists.
Accidents, reporting and first aid
Checklist for safe handling of accidents and proper notification.
Adapted speed and hidden danger
What adjusted speed means in practice, and how you anticipate hazards you cannot see.
Age limits and practice driving
Everything about age limits for class B and what is required for private practice driving with a companion.