We have used the daily observations on the Ji-Qing expressway's traffic flux and applied the tests from fractal geometry, statistics, dynamical systems theory and systematic engineering theory to support a random fractal structure for Ji-Qing expressway's traffic flux system(Hurst exponent H=0.8425 for total traffic flux). In particular, this evidence is supported by the multifractal structure test. The generalized Hurst exponent declines obviously along with the increase of its rank q.
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Chen et al. (2007) studied this question.