Research on Invisible Van Based on Spatial Evolution of Urban Logistics Distribution System

The invisible van can be defined as a van that undertakes the task of freight transportation. It is a new distribution vehicle without freight qualification because of urban freight control under the evolution of urban logistics distribution system. In this paper, we construct the system dynamics model of invisible van, and verify the model feasibility by comparing with the actual data. On this basis, combined with the actual situation of Kunming City, the existing data is used to forecasts the urban traffic bearing index under different freight traffic control conditions in the next 15 years, and analyzed qualitatively and quantitatively. The results represent that the implementation of freight traffic control measures can not achieve the original intention of improving urban traffic bearing capacity, on the contrary, it will reduce the traffic bearing capacity index and accelerate the urban traffic congestion, which is not conducive to the development of the urban logistics system.