The general Council of the Loire has set itself the challenge of using milestones as a means of conveying directions and information, mobilizing in the process the third year students of the Saint-Etienne School of Art and Design (ESADSE). During a workshop they have worked on means of marking out the mountain passes in the Loire department. The exhibition Design et vélo : une nouvelle rencontre, is the restitution of this project and the resulting sign posts. It incites visitors to reflect on the notion of sustainable mobility.