HETEROGENEOUS PEDESTRIAN TRAFFIC FLOW MODELLING AT SIGNALISED INTERSECTIONS

Different types of pedestrians exhibit different speed characteristics and heterogeneity. In the case of mixed pedestrian flow at signalised intersections, pedestrian traffic flow modelling is important in research of the conditions at signalised intersections and the evaluation of services for pedestrians. The characteristics of pedestrian traffic flow at signalised intersections were investigated in this study against the background of pedestrian heterogeneity using videos of pedestrians crossing three signalised intersections in Chongqing recorded in a field survey. The pedestrian walking speeds were manually extracted from the videos and used as the data basis for distinguishing pedestrian heterogeneity. The walking speed data of three types (young, middle-aged, and elderly) of pedestrians at different pedestrian flows were obtained by using a microsimulation software. Based on this, a pedestrian traffic flow model for mixed-type pedestrians at signalised intersections was established and verified by actual cases. In comparison with the HCM model, the model outperforms the HCM model overall in practical applications, indicating its strong applicability and reliability.