title: Quantitative analysis of pedestrian counterflow in a cellular automaton model.
abstract: Pedestrian dynamics exhibits various collective phenomena. Here, we study bidirectional pedestrian flow in a floor field cellular automaton model. Under certain conditions, lane formation is observed. Although it has often been studied qualitatively, e.g., as a test for the realism of a model, there are almost no quantitative results, either empirically or theoretically. As basis for a quantitative analysis, we introduce an order parameter which is adopted from the analysis of colloidal suspensions. This allows us to determine a phase diagram for the system where four different states (free flow, disorder, lanes, gridlock) can be distinguished. Although the number of lanes formed is fluctuating, lanes are characterized by a typical density. It is found that the basic floor field model overestimates the tendency towards a gridlock compared to experimental bounds. Therefore, an anticipation mechanism is introduced which reduces the jamming probability.
authors.affiliation: Institute for Theoretical Physics, Universität zu Köln, D-50937 Köln, Germany. sn@thp.uni-koeln.de
authors.forename: Stefan
authors.initials: S
authors.lastname: Nowak
authors.forename: Andreas
authors.initials: A
authors.lastname: Schadschneider
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D003441:Crowding; D008954:Models, Biological; D011157:Population Dynamics