Most of the city's peak traffic is too congested that the simple public travel pattern of "bus-walking" often can not meet the user's travel needs. The introduction of public bicycle sharing system makes the whole city public transport network evolve into a more diverse multi-mode public transportation system.Based on the real location data of the public bicycle-sharing system of Hangzhou and Ningbo in China, a multi-layer coupling spatial network model considering the geographical information on bus stations,bus routes and public bicycle stations is proposed.The model is applied to study the influence of bicycling between the short-distance bicycle station pairs and walking between the short-distance bus station pairs on the performance of urban public transport networks. The results show that short-distance cycling and short-distance walking can reduce the average path length of urban public transport networks. Therefore,the bicycle sharing system can decrease the average trip time of passengers and improve the operational efficiency of the urban public transport network.%大多数城市中高峰期交通过于拥堵,单纯"公交车-步行"的公交出行模式往往满足不了用户的出行需求,公共自行车共享系统的引入使得整个城市公交网络演化为更为多样的多模式公交系统.通过对中国杭州和宁波具有公共自行车共享系统的城市公交网络的研究,提出了一个考虑了公交车站点、自行车站点和公交线路的地理位置信息的多层耦合空间网络模型;运用该模型研究短距离自行车骑行和短距离步行对城市公交系统性能的影响,研究结果表明:短距离自行车骑行和短距离步行可以降低城市公共交通网络的平均路径长度,同时减少乘客平均出行时间和提高公交系统运行效率.
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