Sensitivity Analysis of Boundedly Rational System Optimal Traffic Assignment Model

摘要

Traffic system is a complex adaptive system. Traffic assignment principle models route choice behaviour of the travelers. Efficiency and fairness are two important indexes for evaluating traffic assignment strategy. To date, disutility minimization behavioral rule has received most attention.User Equilibrium assumes that all the users are strictly selfish, they will strictly select minimum travel cost route. This assumption is not practical. In fact, when the driver selects the route, he will not consider whether his route to be selected is optimum. If travel cost is acceptable, he will select. The paper bases on boundedly rational notion and satisfying decision rule to formulate Boundedly Rational System Optimum model, in which the travelers will be assigned to the tolerable paths, and the objective function is to minimize the total travel time. Sensitivity analysis showed that Boundedly Rational System Optimum model can realize the integration of efficiency and fairness.