Rennes Métropole, the local government authority overseeing the Rennes area in France, is taking a new approach to car-sharing by integrating some of its own service vehicles into the local Citiz car-sharing network. This initiative is a first in France and aims to expand the available fleet at a lower cost. The Citiz network has seen growing demand, especially during weekends and holidays, when the current number of vehicles is insufficient to meet the needs of users. Valérie Faucheux, the vice-president of Rennes Métropole responsible for transport, noted that some of the service vehicles stored in underground parking are rarely used and mostly remain stationary. Inspired by suggestions from ecologist council members, the idea of lending these vehicles to citizens during evenings and weekends—when they are not needed by officials—was approved. Starting in November, two vehicles from Rennes Métropole and one from the nearby town of Saint-Jacques-de-la-Lande will be added to the Citiz network. This marks a small-scale test to evaluate the effectiveness of the system. As part of broader efforts to reduce reliance on private cars, Rennes Métropole is also working to shrink its fleet of service vehicles, promoting alternatives such as walking, public transport, and cycling. Five vehicle pools across the city offer a mix of bicycles, sedans, and utility vehicles, all reservable through a dedicated software for staff. For the time being, the loan of these service vehicles to citizens will be limited to specific locations and times—Friday evening to Monday morning at the Parc Relais la Poterie and Boulevard Laennec—to ensure that officials can still access the vehicles when needed. Citiz, which operates in over 250 cities across France with 2,700 vehicles, has already partnered with Titi Floris, a company specializing in transportation for people with disabilities, to add larger, adapted vehicles to its fleet. This collaboration benefits all parties: the métropole avoids additional costs, Titi Floris receives compensation, and users gain access to more vehicles. The success of this model has sparked discussions about forming similar partnerships with other companies or local governments in the future. According to an Ademe study, each car-sharing user can save between 400 and 1,000 euros annually by avoiding the need for a personal car, and one shared vehicle can replace five to seven individual cars when used collectively.