What percentage of all crashes is typically caused by mechanical failure annually?

Mechanical failure is generally cited as a contributing factor in a modest percentage of traffic crashes, with studies and data suggesting that it typically accounts for around 1% of all accidents annually. This number is supported by various traffic safety research reports and the findings from crash investigations, which indicate that while mechanical issues can lead to crashes, they are far less common than other factors like driver error, weather conditions, and reckless driving behaviors.

In comparison, the other percentages mentioned (2%, 5%, and 10%) overestimate the impact of mechanical failure in traffic incidents. This distinction is crucial for traffic safety professionals, as understanding the causes of crashes helps in developing targeted prevention strategies and safety programs.