The main purpose of the paper is to propose a traffic flow assignment method with matched selection of a multi-level road traffic network structure. Firstly, road connection 'design' parameters of traffic pricing are introduced, equilibrium conditions of users by traffic flow assignment are improved, design/pricing problem models of traffic network are constructed and surrounding semi-differentiable conditions of the reference point are considered and sensibility analysis methods of traffic equilibrium are designed. Then, sensitivity analysis is implemented combined with traffic flow assignment (TAPAS) output based on paired selection, it is shown how to use TAPAS to find a very precise equilibrium solution effectively and use the directional derivative.
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