Stepping into their shoe

I went to try and understand why drivers will cause a traffic jam. I tried putting myself in the drivers shoes to see how drivers cause traffic jam in different scenario. Scenario 1: I am a office guy working at city hall and I always drive to work. I have to work overtime almost everyday as the work load is way too much. Hence, I do not have enough time for sleep. I tend to drive very slow as I am afraid I would fall asleep while driving and causing an accident. Sometime, I am too tired to even realise that I am driving on two lanes. Scenario 2: I am a student that study in Nanyang Academey of Fine Arts. I always drive to school using my father's car. My school is located in the central area. In the morning, I would get stuck in a traffic jam as most people would be driving to work in the central area, hence the traffic jam. I did not dare to try and overtake the car infront of me as it is my father's car and I am afraid of damaging it as I just gotten my driver license not too long ago.