When drivers have no control over their driving environment and are stuck in traffic the lack of control over the traffic event is frustrating and often leads to anger venting towards

Well It depends if the driver is drunk or if the driver is high. 
but I will give you an example for each one. 

A drunk driving accident that results in injury or loss of life is tragic. However, some accidents are particularly horrific because of high fatality rates, terrible injuries, or other circumstances. Due to unawareness of the possible effects of alcohol use, it can lead to fatal injuries, accidents and even death.

Sorry man that a really hard one you got there