This study analyzes the stability of the railway system under the multi-type coupling operation scheme proposed by the authors as a near-future railway operation scheme, in which express and feeder (local) services are combined into a single train. The simulation analysis reveals that the proposed scheme does not differ significantly from the conventional scheme in terms of stability. It shows that both schemes exhibit the same delay propagation behavior in some cases, while in others, they show different behaviors. Furthermore, it was found that adding appropriate margins at characteristic points of the multi-type coupling scheme is necessary to improve stability.
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