How did Americans develop their love affair with driving? Visit the Smithsonian’s National Museum of American History in Washington and the transportation exhibit “America on the Move” will sell you on the commonly held theory that when Henry Ford made cars affordable, Americans loved them and demanded more and more highways. Of course, that exhibit is sponsored by General Motors, which donated millions to put its name on the collection. But University of Virginia history professor Peter Norton, author of “Fighting Traffic: The Dawn of the Motor Age in American cities” contends that’s a myth. Just as outgoing President Dwight...