Optimization design of city rail routing

In order to determine the routing scheme of a line in city track traffic, with the alternative routing as variables, taking the optimal matching between the spatial characteristics of passenger demand and routing, as well as the minimization of operation cost as the objective functions, a nonlinear constrained multi-objective 0-1 programming model is established. With the minimum value of each objective, the weighted coefficient of each objective function is computed with α - method, and the multi-objective problem is transformed into a single objective problem to be solved. Taking Xi’an Rail Transit Line 2 as an example, a selectable routing scheme is calculated.