Carsharing claims to be the eco-friendly method of car rental. In Lille, over 600 people have already subscribed to « Lilas ». The principle : they can reserve one of the cars in the nearest station depending on their needs (shopping, a weekend away…) and promise to bring it back at an agreed time so that another user can use it. A car is therefore used by 5 to 7 customers a day. If this system is successful enough, it will drastically lower the number of individual cars and reduce their cost as well as the number of taken parking spaces.