It could be demonstrated, that this novel surveillance system integrating airborne traffic surveillance with traditional ground detection of traffic flow can yield valuable information needed for a better management of big events. The combination with a simulation-based ap-proach to integrate a traditional travel demand forecast and the on-line data generated during the event itself leads not only to an almost complete coverage of the traffic system, it also delivers a short-term forecast for the action forces to react fast to developing aberrations. Still the methods need to be improved, e.g., data fusion between simulation and reality.