For the AC/DC concert at the Jahnwiesen 2015 in Cologne, the assignment was to perform pedestrian outflow and evacuation simulations for the rock concert with 80,000 visitors. The task of PTV Transport Consult was to carry out microsimulations for standard pedestrian outflow as well as for an evacuation of the concert site in order to uncover security weak points and - if necessary - to develop optimisation measures.