Anger is on the increase in our society. One of the reasons is that people want what they want, when they want it. And they feel entitled to it.
So when someone slows them down, or cuts them off, or when something goes wrong, their response is rage.
Dig below these outbursts of anger and what do you have? Self-centeredness. People are thinking only of themselves, their needs, desires, and schedules.
Somehow, we have to learn that the people around us are just like us. They have feelings, needs, longings, aspirations, schedules. If we could see them as human beings, rather than interruptions, perhaps we could learn to overcome our anger. Who knows, maybe we could learn to be considerate.