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In order to propose more realistic equilibrium traffic assignment method and distinguish traditional traffic assignment method based on the classical Wardropian principle assuming that users minimize either individual travel cost or overall system cost,authors adopted game theory and presented a Stackelberg routing game on the network which the system optimization player is the leader and the mixed-strategy Nash equilibrium players are the followers.Based on Stackelberg model,the road network equilibrium traffic assignment method was discussed,and the generalized Lagrange multiplier method was used to calculate objective function which was transferred into a single-level planning.The example result shows that the efficient of Stackelberg model is higher than that of the user-optimal system,which closes to system optimization,but more closes to reality easily.It indicates users that follow the route guidance information will improve the efficiency of transport system.
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