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Study on calculating method of induced traffic volume

As there is some limitation of current calculating method in induced traffic volume on expressway, according to the change law of induced traffic volume, this paper introduces the mathematical model of quantitative calculating and its optimized solution in order to enhance the computation precision of induced traffic volume. In addition, after calculating the actual induced traffic volume on Xi-Bao and Hu-Ning expressway, on the basis of induction of concrete evidences, the paper has summarized the change features and the eigenvalue of induced traffic volume in different areas.