Modelling Pedestrian Social Group Passing Strategy with Expression-Matrix and Social Force

Abstract

AbstractOur experiments and studies in recent years have shown that the complex pedestrian social group has a hierarchical structure. Small pedestrian groups of 2–3 people are simple groups with stable and straightforward formations. The simple groups are also cellular units that act as subgroups and constitute a more extensive complex social pedestrian group. The complex social pedestrian group has multiple patterns, movement and formation change. In this paper, an Expression-Matrix method is used to coordinate the hierarchical relations of the heterogeneous group and the social relations among subgroup members, and to generate global and local strategies for formation changes of complex pedestrian groups. And an extended social force model is proposed to control the dynamics of group members and forms a stable group formation by adding a set of inner subgroup relationship force and a set of inter subgroup relationship force. Finally, trajectories in the bottleneck scene are compared with the result of the model, which shows the model could accurately describe some of the adoption strategies of complex pedestrian groups.KeywordsComplex pedestrian social groupStrategy of formation variationSpace matrixSocial force model