群集流横断における歩行者間の回避強度水準の検討: 短時間歩行パス分析をもちいた群集解析 その1

摘要

短時間歩行パス図および移動方向バラ図という新しい分析•記述方法を提案し、群集流と歩行者の時系列の位置座標をもとに詳細な歩行状態、加えて群集流を横断する歩行者が迂回•減速で衝突を回避する状況を視覚的に示せることを確認した。さらに、それら回避の強度を迂回回避•減速回避においてそれぞれ3段階に区分し、そのしきい値を定め検証を行った。%This study analyzes the pedestrian's avoidance behavior in crossing flow in order to obtain quantitative criteria for evaluating the difficulty of walking in a crowd. The new graphic illustration methods, called Short-Time Pedestrian Path Diagram and Direction Rose Diagram, are developed and proposed in this paper to represent the state of a crowd visually. The result of our experiment suggests that pedestrians descend their walking speed or/and detour to avoid striking other people and each avoidance behavior can be classified into three levels, whose threshold are defined from the speed or the angular velocity of each pedestrian.