It IS important where he was going, because it was not an emergency, and thus there was no excuse for going 91 mph. It shows, perhaps unwittingly, how Corzine (and dems in general) think they are better than everyone else, and above the law.
I never thought of that, you are right. I agree that this shows that he was rushing to be part of that Don Imus nonsense, and was not rushing anywhere on official state business.