The purpose of this study is to evaluate the pedestrian space with time series interfering area model. The model illustrates the interference of pedestrian's area in the several directions. And the coordinates of pedestrians are sensed and used for evaluation of the space. Pedestrian movement was recorded by the VCR camera and coded individual frames at sampling intervals of 0.5 seconds. The records were projected and corrected for foreshortened perspective. Then the coordinates of pedestrians in each frame were calculated. The pedestrian area is defined as the circle 0.9 meters in diameter in which pedestrian can avoid and pass others. When someone approaches another in pedestrian area, the conflict between two pedestrians occurs. The term "interfering load" can be defined as a load which pedestrians take in such a situation. There are two types of interfering load. One is a load between pedestrians in the same direction and the other is a load between pedestrians in the opposite direction. We only concerned with the Interfering load between bidirectional pedestrians, because monodirectional pedestrians reduce their walking load by forming groups in the same direction. The "time series interfering area model" describes the load between pedestrians in the several directions. This model's advantage is as follows; (1) The characteristics of pedestrian loads in a time series are grasped and comprehended with it. (2) As the congestion in the observation area in a time series is observed, and the area is evaluated particularly. (3) The situations of intersecting pedestrians in the several directions are grasped.
