Our Elena Caccherano was speaker at FEMTC2018, the conference organized by Thunderhead Engineering. Elena presented the results of the analyses performed for the Ivrea Carnival safety plan project regarding crowd dynamic analyses. Pathfinder has been used and all the features have been implemented to arrange the main issues. Evaluation of the egress time in case of an immediate square evacuation has been calculated as also the time on que and the effect on the density produced by the entrance of a parade inside a square full of people. The aim of the presentation was to explain how it is important an integrated and interdisciplinary approach to solve crowd management problems in case of urban crowd events.