Abstract
Metros are usually built and added on the basis of a completed bus network in Chinese cities. After the metro construction, it is faced with the problem of how to adjust and optimize the original bus lines based on the new metro system. This research mainly proposes a bus line optimization method based on bus and metro integration. In the consideration of the geographical space, the cooperation and competition relationship between bus and metro lines is qualitatively introduced according to the geographical location and service range of metro (800 m radius) and bus (500 m radius) stations. The competition and cooperation indexes are applied to define the co-opetition relationship between bus and metro lines. The bus line optimization model is constructed based on the co-opetition coefficient and Changsha Metro Line Number 2 is chosen as a case study to verify the optimization model. The results show that the positive competition, efficient cooperation, and travel efficiency between metro and bus has been significantly enhanced after optimization. Moreover, this paper provides a reasonable reference for public transport network planning and resource allocation.
Highlights
Due to their large capacity reliability, metros have been constructed in many big cities to alleviate serious traffic congestion in China
Where coo is the cooperation index between bus line B and metro line M; Tcoo is the total number of actual cooperation stations; TBM is the total number of bus and metro stations; N is the number of overlap stations; TB is the total number of bus line stations; TM is the total number of metro line stations
It lacks the expression of the micro-level of the competition and cooperation between the bus and the metro lines, which leads to problems such as malignant competition between multi-bus lines and unreasonable competition between metro and bus lines in the actual public transport network
Summary
Due to their large capacity reliability, metros have been constructed in many big cities to alleviate serious traffic congestion in China. This research discusses the development of bus and metro integration in urban cities, which belongs to the field of sustainable transportation network planning and facilities optimization. This research focuses on metro station-based bus line optimization instead of redesigning a new entire network, which can reduce workload and improve operability simultaneously. For demonstrating the practical significance of the proposed method, a case study based on the Changsha Metro Line 2 shows that the service level and total travel cost can be improved considerably by the proposed localized integration between metro and bus systems. This remainder of the paper is organized as follows.
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