Why don't Qingdao Metro 1 Line 7 and Line 8 use Type A cars?

From the passenger flow scale, M 1~M4 lines, M6, M7 and M9 all belong to large-capacity systems, so it is more appropriate to choose type A or type B vehicles. Except for Line 2 and Line 3, only Line 1, Line 4 and Line 7 have more than 30,000 passengers in the peak hours, so from the perspective of enjoying the network resources, Qingdao rail transit should adopt B-cars.

Because of the difference between Type A and Type B, some maintenance equipment can't be used, such as fixed drivers and mobile platforms. If 1 line adopts Type A vehicles, it will be difficult for 1 line and Line 3 to share resources, so it is necessary to re-plan the layout and resource sharing scheme of the network car base.

Therefore, from the point of view of the enjoyment of resources and the reservation of depot projects, it is reasonable to adopt the unified car selection of the whole network because of the high enjoyment of resources on each line.

Type a subway

The localization of A-type subway trains is one of the major tasks to achieve a major breakthrough in the 16 key areas identified in "Several Opinions of the State Council on Accelerating the Revitalization of Manufacturing Industry", and it is also a major industrial science and technology key project in Shanghai.

Shanghai Rail Transit Equipment Development Co., Ltd., Tongji University Railway and Urban Rail Transit Research Institute, Shanghai Shentong Metro Group and other units undertaking this task, through Industry-University-Research's close integration and painstaking research and development, have achieved a zero breakthrough in the research and development technology of the first A-type subway train in only one and a half years, which is half the time for multinational companies to develop similar products.