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We study the lane-changing behavior in multilane highway modeling by a cellular automaton. We analyze the effects of speed limit and stochastic noise. A new parameter is introduced to allow vehicles not to change lanes even when the environmental criteria are met. Without stochastic noise, the lane-changing rate vanishes in the stationary states of a homogeneous highway. With stochastic noise, vehicles change lanes frequently even when there are no slow vehicles to overtake. The lane-changing rate reflects the intrinsic fluctuations much more than the inhomogeneity of the highway. Aggressive vehicles which change lanes at every opportunity will only keep a speed slightly larger than others.
D. Huang (Wed,) studied this question.
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