Facing traffic saturation issues concerning some of the lines around Paris in particular, the SNCF company (the French national railway company) has retained Golaem for the development of a new software tool, simulating the time sequence corresponding to incoming travelers crossing the way of outgoing travelers, when the train is stopped at the station. This tool aims at providing SNCF with unprecedented simulation capabilities for studying the station platform and train design, in order to optimize the travelers flow, improving their comfort.