Do you really want Formule 1? There are other chain hotels which are as cheap, and have en-suite bathrooms, instead of bathrooms in the corridors. Some are Premiere Classe (29 euros at the moment), B&B hotel, QuickPalace, Kyriad, Balladins, Etap and others. All are better than Formule 1. Check out their websites as all have maps, and you will know which route you are going on, and approximately where you will be when you want to stop.