It has maintained the same annual fee since its inception in 2009. But its service has grown steadily. Nearly 6,000 people use it in a city of just over 100,000 inhabitants, a 15% increase each year. And it costs no more than the annual maintenance of a bus line, €300,000, with a staff of nine. We're talking about Girona's public bicycle service, Girocleta, which was created sixteen years ago following the Bicing model and has become a successful model of sustainable mobility in mid-sized cities by adhering to two very clear principles: being inexpensive, above all, and having very limited and sustained growth, with an average of one or two new stations each year to avoid overcrowding.