At a time when the climate emergency is at the heart of all debates, the train is a leading sustainable mode of transport. Its number of users is constantly increasing and many actions are being implemented to encourage the undecided to favour it. However, its sometimes high cost and the closure of many small stations in rural areas do not allow everyone to take full advantage of its services. How can we encourage more and more people to leave their cars behind and take the train? How can we compete with air travel on short and medium journeys? How can we make the train accessible to as many people as possible while maintaining a quality offer? These are all questions to which the transport actors are trying to provide some answers.