Abstract
Based on the analysis of passenger and cargo exchange model and the characteristics of traffic distribution in City Circle, this article sums up three volume spatial contact model of China, proposes the parameter calibration method for spatial interaction model, and analyzes the model usability. Finally, by taking the traffic forecast on Xiaogan to Xiantao section of Wuhan City Circle's expressway loop link as an example, the process of trips forecasting is analyzed to verify the feasibility of traffic volume spatial model.
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