Influence Model of Transportation between Central Cities and Satellite Cities to Urban Spatial Expansion

When analyzing the function of transportation between central cities and satellite cities to urban spatial expansion, it is the key to quantificationally study the action mechanism and contribution degree of transportation between central cities and satellite cities to urban spatial expansion. This paper established the influence model by using the method of TOPSIS and the technique of computer simulation, analyzed the action mechanism and contribution degree of transportation between central cities and satellite cities to urban spatial expansion. It is improved by an example that the development of transportation between a central city and a satellite city can increase the allocation proportion of urban expansion units in the satellite city but can decrease it in the built-up area and urban fringe. The conclusion is obtained that the city space can expand to satellite cities by developing transportation between central cities and satellite cities.