Objective The concepts, strategies, and network optimization for the integrated development of trunk railways, intercity railways, city railways, and urban rail transit within Shanghai metropolitan area are investigated.

Method Based on the evolution of metropolitan spatial patterns and traffic demand characteristics, the general law of traffic demand in metropolitan areas is analyzed. Drawing on the integrated development experiences of multi-tiered rail transit networks in Paris and Tokyo metropolitan areas, the urban and transportation characteristics in Shanghai metropolitan area are analyzed. Subsequently, ideas and recommendations for the integrated development of Shanghai multi-tiered rail transit network are proposed.

Result & Conclusion The approach for the above integrated development of Shanghai network should focus on adapting to changes in the urban spatial structure and be guided by transportation demand, to adjust and optimize the layout of each-tired rail transit network. Trunk railways with surplus capacity can serve intercity and urban travel demands. Urban rapid lines planned for Songjiang and Jiading districts, and their corresponding spatial circles, should directly connect the new town core areas with the downtown area. Some tangential urban lines with poor passenger flow benefits or inconsistent with urban spatial development directions should be canceled. Local lines can be planned to provide effective services within new towns and between adjacent new towns. In principle, extending urban rail transit lines to new towns is not recommended. Integration should be supported through measures such as reserved infrastructure, co-management, and interoperable fare systems to maximize functional benefits.