What are 90% of car accidents caused by?

What are 90% of car accidents caused by?

Learn about what are 90% of car accidents caused by? and how it affects your legal rights after a car accident. Get expert advice from experienced car accident attorneys.

FindCarAccidentAttorneys Editorial Team
July 4, 2025
4 min read

# What are 90% of car accidents caused by?

Understanding what causes the majority of car accidents is crucial for both prevention and legal preparedness. Research consistently shows that human error accounts for approximately 90% of all car accidents, with specific behaviors and conditions creating the highest risk scenarios. If you've been involved in an accident, knowing these causes can help strengthen your legal case when working with an experienced car accident attorney.

The 90% Rule: Human Error Dominates

According to the National Highway Traffic Safety Administration (NHTSA), human error is the primary factor in about 90% of all car accidents. This statistic encompasses various forms of driver negligence, poor decision-making, and risky behaviors that lead to crashes.

Primary Human Error Categories

1. Recognition Errors (41% of accidents)

- Inadequate surveillance of surroundings

- Distraction from driving tasks

- Failure to recognize hazards in time

2. Decision Errors (33% of accidents)

- Driving too fast for conditions

- False assumptions about other drivers' actions

- Illegal maneuvers and aggressive driving

3. Performance Errors (11% of accidents)

- Overcompensation or panic reactions

- Inadequate directional control

- Other control-related failures

4. Non-Performance Errors (7% of accidents)

- Falling asleep at the wheel

- Medical emergencies while driving

- Physical impairment affecting driving ability

Top Specific Causes Within the 90%

Distracted Driving (25-30% of all accidents)

The leading cause within human error category:

- Cell phone use while driving

- Texting and social media usage

- Eating, drinking, or personal grooming

- Adjusting vehicle controls or GPS

- Talking to passengers

Speeding and Aggressive Driving (29% of fatal accidents)

Speed-related factors include:

- Exceeding posted speed limits

- Driving too fast for weather/road conditions

- Racing and road rage incidents

- Tailgating and unsafe following distances

Impaired Driving (28% of fatal accidents)

Substance-related impairment:

- Alcohol consumption (blood alcohol content over legal limit)

- Illegal drug use affecting motor skills

- Prescription medication side effects

- Combination of multiple substances

Fatigue and Drowsy Driving (6% of fatal accidents)

Sleep-related impairment:

- Driving while sleep-deprived

- Falling asleep at the wheel

- Microsleep episodes during driving

- Shift work sleep disorders

The Remaining 10%: Non-Human Factors

While human error dominates, other factors contribute to accidents:

Vehicle Defects (2% of accidents)

- Brake failures and mechanical problems

- Tire blowouts and defective parts

- Design flaws in vehicle safety systems

- Inadequate vehicle maintenance

Environmental Factors (8% of accidents)

- Severe weather conditions (rain, snow, fog)

- Poor road design or maintenance

- Inadequate signage or lighting

- Construction zones and work areas

Legal Implications of the 90% Statistic

Understanding that human error causes most accidents has significant legal implications:

Establishing Negligence

- Proves that accidents are typically preventable

- Demonstrates duty of care violations

- Supports claims of driver responsibility

Insurance Negotiations

- Counters claims that accidents are "unavoidable"

- Supports arguments for full compensation

- Helps establish clear fault determination

Damage Calculations

- Justifies compensation for preventable injuries

- Supports claims for pain and suffering

- Validates arguments for punitive damages

How This Knowledge Helps Your Case

An experienced car accident attorney uses these statistics to:

Build Stronger Arguments

- Reference authoritative data to support your claim

- Demonstrate the preventable nature of your accident

- Counter insurance company minimization tactics

Investigate Thoroughly

- Focus on human error factors in accident reconstruction

- Gather evidence of specific negligent behaviors

- Interview witnesses about driver actions

Negotiate Effectively

- Use statistical evidence to justify settlement demands

- Present compelling arguments about fault and liability

- Counter lowball offers with factual data

Prevention Based on the 90% Rule

Knowing that human error causes most accidents, you can reduce your risk by:

- Eliminating distractions while driving

- Following speed limits and adjusting for conditions

- Never driving impaired by any substance

- Getting adequate rest before long drives

- Maintaining your vehicle properly

- Staying alert and practicing defensive driving

When You're the Victim

If you've been injured by another driver's negligence (part of that 90%), you have legal rights:

- Right to compensation for medical expenses and lost wages

- Right to pain and suffering damages

- Right to property damage recovery

- Right to legal representation throughout the process

Conclusion

The fact that 90% of car accidents are caused by human error is both sobering and empowering. It's sobering because it shows how many accidents are preventable, but empowering because it means victims have strong legal grounds for compensation when injured by negligent drivers.

If you've been hurt in an accident caused by human error, don't let insurance companies convince you it was unavoidable or minimize your claim. Contact an experienced car accident attorney who understands these statistics and can use them to fight for the full compensation you deserve.

Remember, when human error causes your accident, the responsible party should be held accountable for all resulting damages – and skilled legal representation ensures that happens.

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