Urban population and mobility needs are rapidly growing while transportation infrastructures are constrained by both limited space and budget allocation. Demand is greater than supply which produces saturation phenomena. Congestion is a major issue impacting the performance of urban transit systems in many ways: operating costs, efficiency and quality of service to name just a few. Regarding rail transit, congestion phenomena are observed in both train and pedestrian traffic. At metro stations, train and pedestrian flows meet and interact with each other. Pedestrian arrivals are pulsed by train arrivals and, inversely, train departures may be delayed because of an excessive number of passengers boarding or/and alighting.The interaction mainly occurs at the platform level where the exchange between passengers is observed.