信号控制四路环形交叉口多进口协同放行方法

针对传统信号控制四路环形交叉口环内车辆间相互干扰对交叉口延误的影响，本文提出 1种多进口协同放行的信号控制方法.首先，基于元胞传输模型建立能描述信号控制四路环形交叉口车流特征的动力学模型；并在此基础之上，以交叉口延误为优化目标、配时参数为目标变量建立信号优化模型，利用遗传算法进行优化，从而得到信号配时参数；最后，通过实例对模型的适用性进行分析.结果表明：四路环形交叉口进口道左直车道分流渠化后，环道车辆延误明显降低；与单进口轮流放行方式相比，本文提出的多进口协同放行控制方法能有效降低交叉口车辆延误.

Multi-approach Collaborative Release Method of the Signalized Four-leg Roundabout

For the problem of intersection delay caused by mutual interference between circulating vehicles of the signalized four-leg roundabout, the paper proposes a signal control method for multi- approach collaborative release. Firstly, a dynamic model is established based on a cell transmission model, which uses to describe traffic flow characteristics of the signalized four-leg roundabout. Then, a signal optimization model is established with intersection delay as the optimization goal and timing parameters as target variables, and the signal timing parameters are obtained through optimization with the genetic algorithm. Finally, the applicability of the model is analyzed by cases. The results show that vehicle delay of circulating lane was improved obviously after channelization of the left-turn and straight lane of the four-leg roundabout. Compared with the single-approachentering operation, the proposed multi-approach collaborative release control method can effectively relieve the vehicle delay of intersections.