Studies from the American National Highway Traffic Safety Administration (NHTSA) show that human error (e.g., misjudgment, speeding, fatigue, intoxicated or distracted driving, etc.) is the cause of 94-96% of all motor vehicle accidents.

https://www.forbes.com/sites/forbestechcouncil/2020/07/30/why-self-driving-cars-might-never-become-a-commodity/#4323e5612902