Xiaofang Xiao

Tongji University · college of transportation engineering

This work studies the flexible rolling stock strategy in urban rail transit lines, by which various train units can be coupled to or uncoupled from the trains in certain stations according to the time-varying passenger demand. Due to the use of various train units, coupling and uncoupling train units must respect specific rules related to the shunt...

Metro lines of some mega cities usually suffer from extreme congestions in peak hours, leading to serious operation risks. To relieve the extreme saturation for overcrowded metro lines, this study explores a novel train operation strategy, i.e., flexibly allocating the capacities through reserving carriages at different stations according to the ti...

A novel green delivery method for express delivery based on the urban metro network, referred to as Green metro express delivery (GMED), is presented. A multi-objective mathematical programming model is first proposed to maximize the search for the best transportation costs and lowest carbon emissions. To solve the GMED model e-ciently, a two-layer...

At metro junction stations located in transportation hubs, a great number of passengers need to transfer to the metro system from other transportation modes during peak hours. This paper proposes a new train operation strategy—reserving carriages dynamically on each service train at the departure station for the metro junction station, which aims t...