How can one overcome anger, quick emotional outbursts, and uttering inappropriate words, especially when driving, and avoid offending others?

We have previously discussed means of repelling and treating anger in previous fatwas. As for what you uttered against some people, you must repent and seek forgiveness. If you know them and they have become aware of what you said, then you must seek their forgiveness. If they do not know, then general seeking of forgiveness is sufficient without informing them. If you do not remember them or know them, then supplicate and seek forgiveness for them. And increase in good deeds to expiate your sins and settle any rights you owe.