用户均衡和信号控制自适应组合模型

Self-adaptive model of combining user equilibrium and signal control

为克服传统的交通信号设计方法不考虑驾驶人路径选择行为的缺点,在考虑驾驶人路径选择行为的基础上,提出一种新的用户均衡和信号控制自适应组合模型,优化交叉口信号配时,并给出了具体求解算法和步骤。研究结果表明:该模型使用户均衡和信号优化2个过程不断交互迭代,直到路径流量和信号配时稳定和收敛;当驾驶人对不同路径的费用差异感觉越明显时,计算过程收敛越快。

The route choice behavior of travelers is not considered in the traditional traffic signal design method,since the traffic volume used in signal timing calculation is based on the on-site survey before the change of the signal.Because travelers reevaluate the route travel cost and update their travel routes,the real traffic volume after the change of the signal timing will deviate from the surveyed data.This paper proposes a new self-adaptive model of combining user equilibrium and signal control,which can be used to optimize intersection signal timing considering the route choice behavior of travelers.Here the user equilibrium model is used to describe the travel route updating after the change of the signal timing,and the signal timing will be renewed based on the altered network flow.The two processes of user equilibrium and signal timing repeat iteratively,until the route flow and signal timing become stable and convergent.The numerical example shows that the computation convergence is faster if the drivers are more sensitive in perceiving the difference of route costs.1 tab,4 figs,9 refs.