Most traffic accidents are due to the **human factor**. This is because between 70 and 90 out of every 100 accidents are caused by drivers' errors or inappropriate behaviors. Some examples of these behaviors include **speeding**, **consuming alcohol**, and **distractions** at the wheel.


In comparison, accidents caused by the **condition of the road** or **vehicle failures** are significantly fewer. Road problems, such as being wet or losing control on a curve, account for between 10 and 35 out of every 100 accidents. Mechanical failures, such as brake problems or a flat tire, are responsible for between 4 and 13 out of every 100 accidents.

Furthermore, many of these human risk factors can be avoided if drivers adopt responsible behavior, such as checking the condition of the tires before a trip or reducing speed in rainy conditions. Therefore, the human factor is the main cause of traffic accidents.