I spend a lot of time driving. My daily commute is 50 minutes. That means I spend almost two hours a day driving. It seems that common courtesy while driving has disappeared. I'll give you some examples.
"Please and "Thank You". Remember when those were referred to as "the magic words?" According to a recent Rasmussen survey, being polite has taken a turn for the worse.
When is the last time you remember anyone thanking you or holding a door or saying excuse me if they walked in front of you?