Research on improved integrated optimization model for mode and route in multimodal transportation basing on the PSO-ACO

According to feature in the relationship between the transport mode selection and the transport route optimization, a integrated model which can be used to select the transport mode and optimize the transport route synthetically was proposed to fit the diversification of the transport route and the transport process practically. Then, the solving method about the integrated model was achieved by the PSO-ACO double-layer optimization algorithm. The PSO is performed at the master level to select nodes sequence, while the ACO is carried out at the slave level to look for optimal transportation mode and path combination. Finally, the simulation results and comparison with others´ validate the effectiveness of the proposed algorithm to solve the problem of the multi-node, multi-mode, multi-path.