In this paper, we present an improved prefactor function of the Helbing model based on the three-phase theory. The new prefactor function takes into account multi critical points in the transition of traffic flow to c...
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(纸本)9780784410394
In this paper, we present an improved prefactor function of the Helbing model based on the three-phase theory. The new prefactor function takes into account multi critical points in the transition of traffic flow to calculate the fluctuation of synchronized flow. Corresponding to the new function, the primary expressions of the Helbing model have been improved to reflect the complex property of the overlap region in the transition. Then we process the empirical data and calibrate all parameters of the new model by the method similar to the Helbing's. As demonstrated by various examples and empirical data, the new model has simulated traffic flow closer to reality than before. Copyright ASCE 2009.
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