road kindness

A couple of days ago, I was sitting in the turn lane at a red light with my little family in the car, and the guy in front of me got out of his car and started signaling to me. I didn't understand him, so he walked back toward us and said, "Your rear door is ajar. Would you like me to close it for you?" Then he opened my daughter's door and shut it firmly. I hollered a "thank you" as he hopped back in his car and drove away.
My husband and I looked at each other in surprise, and I said, "I think that was the opposite of road rage!"
It seems like our society should have a word to describe that kind of thing and should practice it more frequently.