The lower level is a fixed demand user equilibrium assignment model, which simulates the travelers' path choice behavior and calculates distributions and running characters of traffic demand on the road network.
(5)The paper unifies the service cost to time through LA time value, and putsforward a generalized cost model. Based on it, a logistics equilibrium assignment model is proposed with algorithm presented.
Because equilibrium assignment model has large number of variables and restriction conditions, it is difficult to solve it, which affects its application.
The delay at nodes is considered in the equilibrium assignment model special for urban road network, which is closer to the real case of urban road network and better than other common assignment models.
专适于城市道路网络的交通均衡分配模型 (stochastic user equilibrium,SUE)考虑了城市道路网中交叉口处的分流向延误 ,更接近于城市道路网络的实际交通情况 ,优于常规的交通分配模型。
Compare results of the two groups, together with non-equilibrium assignment results, we find that Ant Colony Algorithm is well applied and the results are reasonable, it provides a new method in solving transportation equilibrium assignment model.
In this view,based on the four-stage traffic model theory,using O-D estimation method and stochastic user equilibrium assignment model,with the purpose of achieving a realistic and reasonable result,this paper has designed the transit route adjustment and effect analysis procedure.
Resolving traffic assignment problems with a logit model will result in some error because of the correlation of the trip cost and the flux, whereas the application of the random equilibrium assignment model is confined for its complex arithmetic.
In this paper, a new estimation method of origin-destination trip matrix from link traffic volumes under equilibrium traffic state is described. Combining wardrop equilibrium assignment model with maximizing entropy model, a iterative algorithm is put forward. The computation example shows that the result is satisfactory, having better convergence. Meanwhile the method makes it possible to realize on-line traffic control.
In this paper, genetic algorithms(GAs)are presented to solve an equilibrium assignment model with capacity constraints The main advantage of using the GAs is that the problem can be reformulated in a manner that is computationally simpler and more efficient than the original problem by eliminating the part of constraints The numerical results show that the procedure of using the GAs can be extended to other transportation ne...
In this paper, the system character of urban transit network and the principle of passenger how to choose route when congestion exists is analyzed,also uncertain factors are discussed. Further, link cost function is developed and a stochastic user equilibrium assignment model which satisfies the SUE(Stochastic User Equilibrium) principle is formulated, then GA(Genetic Algorithm) is cooperated with the model. Finally, a ...