Due to the growth of the urban population in the world, the fact of densification in cities has increased. As a result of this reality, the issue of lack of physical space in cities emerges. In this sense, the author highlight the importance of sustainable and multifunctional use of the city infrastructure, especially of the railway stations. The author mentioned three practical examples in different French cities: The Saint-Lazare railway station in Paris as an example of “Shopping centre and Railway station” concept, the Strasbourg's Railway station “Environment and Railway station”, Lyon's railway station Part Dieu and Geneva's Railway station “Cornavin” as an example of the concept “Intermodal Hub and Railway station”.