Julien Lelièvre put in thousands of kilometres and years of research to document and photograph seventy-one works of art dotted about on the French motorway network. This pictorial inventory, organised into twelve itineraries, is introduced by a corpus of photographs that act as a sensitive diary of his travels. Taken as a whole, the photos offer an unexpected insight into the peculiar world of the motorway and, for the first time, provide a broad perspective on this sometimes disparaged and often unrecognised art form.