高速公路转向快速路的匝道控制

Local ramp control for urban expressway and related periphery freeway

针对高速公路转向城市快速路匝道多目标协调控制研究的不足,以支持向量机与神经网络的机理对比分析为基础,以径向基为核函数,设计一种理论上更优的匝道控制律求解方法.在建立控制方程和评价控制效果方面,基于排队论提出用循环等待时间等目标参数,描述匝道交通排队控制模型.利用高速公路联络线转向城市快速路的实例数据,在高密度区间进行仿真,并与多种方法进行对比.结果表明,本模型和算法在减少循环等待方面可实现更优的控制品质.

As multi-objective coordinated ramp traffic control is new,the problems of coordinated metering algorithm and evaluation for local ramp are considered in this paper.A ramp control metering algorithm,with a mechanism better than neural network using radical based function-support vector machine aiming at the optimal coordination of mainline and ramp,is designed.A modified ramp latency model is proposed using the method of queuing theory is proposed.With in-situ traffic flow data of high-density period,three known and one novel methodologies are compared.The preliminary simulation-based investigation of the local ramp coordinated metering for urban expressway and related periphery freeway using these methodologies demonstrates the control efficiency and accuracy,especially in the decrease of reduplicate waiting time.