A Motor-Flight Through France (1908) is Wharton's travel novel espousing the revolutionary new mode of touring: "The motor-car has restored the romance of travel." Long before the days of interstate highways, indeed!
You may also enjoy another early car-trip adventure, Sinclair Lewis's Free Air.
Part I - Chapter I - From Boulogne to Amiens
Chapter II - Beauvais and Rouen
Chapter III - From Rouen to Fontainebleau
Chapter IV - The Loire and the Inre
Chapter V - Nohant to Clermont
Chapter VI - In Auvergne
Chapter VII - Royat to Bourges
Part II - Chapter I - Paris to Poitiers
Chapter II - Potiers to the Pyrenees
Chapter III - The Pyrenees to Provence
Chapter IV - The Rhone to the Seine
Part III - A Flight to the North-East