What Percentage of Car Accidents Are Caused by Human Error?

Hands on the wheel when driving at high speed from inside the car.

We all make mistakes, but a mistake on the road can be deadly. So, just how many car accidents are caused by human error? The following are some shocking statistics about driver errors and collisions.

Statistics on Human Driving Errors Causing Car Crashes

Indiana University conducted an eye-opening study about the percentage of car accidents caused by human error. They found that human error was the primary contributor in 93 percent of the collisions they examined.

The top three human mistakes that led to car crashes were:

  • Inattentiveness
  • Speeding
  • Improper lookout

The study also noted that environmental factors were the primary cause of 12 to 34 percent of accidents, and just 4 to 13 percent involved mechanical or other issues with one of the vehicles in the crash.

The Insurance Information Institute (III) also recently conducted a study that broke down the percentages of human error-caused traffic collisions. Some things to note:

Common Types of Human Mistakes That Lead to Collisions

Some everyday mistakes drivers make can have catastrophic consequences, like:

  • Failing to brake soon enough and then slamming on the brakes
  • Misjudging the distance between themselves and another vehicle or the turn they need to make
  • Trying to make it through an intersection before the light changes, and running a red light instead
  • Speeding
  • Not checking blind spots before merging or changing lanes

Causes of Human Driver Errors

Humans make mistakes, but deadly situations can occur when they get behind the wheel of a car, truck, or commercial semi after drinking, when they’re too tired to operate the vehicle, or when they’re too distracted to think clearly.

Common human driving errors include:

  • Drunk driving – Alcohol impairs a driver’s coordination, vision, and ability to make appropriate decisions.
  • Drowsy driving – Drowsiness and fatigue have much the same effect on a driver as alcohol or drugs. Any degree of impairment can lead to a crash.
  • Distracted driving – Texting, putting on makeup, and eating behind the wheel are all forms of distracted driving that remove a driver’s hands, eyes, or focus from driving.
  • Recognition errors – Sometimes, drivers mistake one object for another or fail to notice a smaller-profile vehicle on the roadway in time.
  • Decision errors – Sometimes, people make bad decisions behind the wheel, like speeding or driving too fast for inclement weather conditions.
  • Performance errors – Performance errors refer to a driver’s physical missteps, like accidentally shifting into neutral by mistake or turning the steering wheel too hard and overcorrecting.

Contact Our Alabama Car Accident Lawyers for Help After Someone Else’s Error Causes a Crash

Have you been injured in a collision caused by another driver’s mistake? Contact our experienced car accident attorneys at Morris, King & Hodge, P.C., today for a free consultation about your case.

Attorney Joe A. King, Jr., has focused his law practice on representing injured people since graduating from law school and being admitted to the Alabama State Bar in 2000. During law school, Joe interned for the founder of Morris, King & Hodge, P.C., and joined the firm immediately after graduation. Joe and his colleagues at the law firm have secured more than $168 million for their clients since the firm’s founding.

 

During his more than a quarter-century of legal practice, Joe has earned numerous professional recognitions. He attained an AV Preeminent® rating from Martindale-Hubbell, a prestigious peer-rating organization for attorneys. The Best Lawyers in America© named Joe “Lawyer of the Year” in the category of Plaintiffs’ Personal Injury Litigation for Huntsville in 2026. He received similar accolades in other practice areas over the previous four years.

 

A native of Huntsville, Joe earned both his undergraduate and law degrees from the University of Alabama. In addition to efforts to raise awareness of the dangers of distracted driving, his professional and community commitments include serving as Secretary of the Madison County Bar Association (2007-2008) and serving on the Board of the Huntsville Child Care Center and the Board of Trustees for Trinity United Methodist Church.

 

Admitted to Alabama Bar: 2000

Years of Legal Experience: 26

Listed in The Best Lawyers in America®: 2018-Present

Listed as an Alabama Super Lawyer: 2016-Present