Crowd disasters are more and more known and documented, but the ways of preventing them don’t follow closely that trend. Train and station operators face an increasing pressure with pedestrian flow management, as ridership often grows more quickly than resources, and cannot rely on a pedestrian flow overview. To help tackling these issues, we launch a global observatory of the current practices and research about pedestrian flow management in stations. This observatory collects, analyses, and synthetises the available information from train and station operators, existing databases, academic and grey literature. In the literature, some papers and books are already explaining very interesting pedestrian flow management techniques, but no generalized analysis has been made. Several websites are listing crowd disasters and near-miss cases, but they generally don’t analyse the causes of the accidents, and they don’t offer a panorama of the levers that could be used for preventing disasters or in daily use. Moreover, flow management is not limited to safety and should also enable comfort, accessibility, or railway operation efficiency, which is not broadly covered by these sources. Finally, there is no consensual definition of the capacity of a station, making it difficult to assess the necessity of expansion works. To address these issues, the observatory collects and shares well-sourced information about crowd and pedestrian flow management, focusing on the case of train stations. That observatory in run is an open-source and collaborative manner, involving railway companies, station managers, and researchers. It aims at providing a complete list of crowd accidents, and a near-complete list of flow managements levers that can be used in the context of train stations. This paper describes these three tasks of the Observatory: know the risks, collect the solutions, assess the saturation. It also explains how to contribute to this collective effort.