Driver error contributes to approximately what percentage of all traffic crashes?

Driver error contributes to approximately what percentage of all traffic crashes?

• A. 80% of all traffic crashes
• B. 90% of all traffic crashes
• C. 70% of all traffic crashes
• D. 50% of all traffic crashes

Answer: (B)

The key idea here is that human factors are the dominant cause of most crashes. Driver behavior—such as speeding, inattention, following too closely, failing to yield, or driving while impaired—accounts for the vast majority of crashes. Because of how often these mistakes occur, the best answer is the one that states driver error contributes about 90% of all traffic crashes. This aligns with safety research and education, which emphasize that improving driver choices and responses has the biggest impact on reducing crashes. The other percentages underestimate how much driver actions contribute, so they don’t reflect the common findings in traffic-safety data.

The key idea here is that human factors are the dominant cause of most crashes. Driver behavior—such as speeding, inattention, following too closely, failing to yield, or driving while impaired—accounts for the vast majority of crashes. Because of how often these mistakes occur, the best answer is the one that states driver error contributes about 90% of all traffic crashes. This aligns with safety research and education, which emphasize that improving driver choices and responses has the biggest impact on reducing crashes.

The other percentages underestimate how much driver actions contribute, so they don’t reflect the common findings in traffic-safety data.