Driving Miss Daisy deals with some dark themes, but it does so with a sunny demeanor. That's the South for you—sugar-coating the dark truth.
The film includes one explicit racist statement. It is exceptionally shocking, because although there is underlying racial prejudice throughout the entire movie, it's usually denied by Miss Daisy, who swears she's never been prejudiced. Her prejudice is much subtler than the Alabama cop who describes Hoke with the N-word.