ODBZ模型下共享单车与公共交通多维竞合关系的时空特征OA

To reveal the coopetition relationship and spatiotemporal characteristics between bike-sharing and public transit under different scenarios,this study takes Nanshan District of Shenzhen as the study area and constructs an origin-destination and buffer zone(ODBZ)model based on the spatial relationship between bike-sharing trip origins and destinations and the buffer zones of public transit stops.The results show that the six types of coopetition relationships exhibit significant spatiotemporal differences between weekdays and non-working days.Temporally,weekday travel is dominated by commuting activities,with higher proportions of inter-line competition and transfer trips,particularly during the morning and evening peak periods.Travel on non-working days is dominated by leisure and daily-life activities,accompanied by an increase in same-line substitution.The proportions of feeder connection,gap filling,and internal circulation remain relatively stable and are mainly concentrated in periods with insufficient public transit supply.Spatially,all relationship types are centered in the urban core and gradually extend outward along major corridors and transit hubs.Compared with non-working days,same-line substitution,inter-line competition,and transfer trips exhibit stronger spatial agglomeration on weekdays.Feeder connection,gap filling,and internal circulation show relatively minor differences between weekdays and non-working days and display a more dispersed spatial pattern.These findings indicate the relatively stable foundational role of bike-sharing in facilita-ting last-mile connectivity,complementing areas underserved by public transit,and supporting short-distance intra-regional mobility.