There's no shortage of means of locomotion in Georges Simenon's work, both in his novels and in his adapted detective novel, the subject of this book. Whether it's the train in Maigret chez les Flamands, the car in Maigret tend un piège, the ocean liner in Le Passager du Polarlys or the tramway in Maigret et la danseuse du Gai-Moulin, throughout our corpus, the means of transport plays an essential role in the graphic-narrative system. As part of the character's mobility or the plot's impact, the latter, little examined by critics, allows us to celebrate its aesthetic-poetic value at the heart of Simenon's graphic detective stories.