一种改进的多带宽干线协调控制模型

A Revised MULTIBAND Model for Arterial Road Coordinate Control

摘要:

针对经典的多带宽干线协调控制模型——MULTIBAND中绿波带按照一条中心线严格对称造成的求解范围小和绿波带在绿灯时段内的位置不合理造成的绿波不稳定两个问题，从取消绿波带中心线对称和增加绿波带位置约束两方面入手，提出一种改进的MULTIBAND干线协调控制模型。改进后的模型提出了非对称式绿波的概念，允许不同路段上的绿波具有一定的灵活性，不拘泥于与其他路段绿波构成连续对称；同时增加了绿波带位置的约束，使得求解出的绿波带会尽量靠近上下游绿灯的中间位置，提高绿波运行的稳定性。以临沂市沂蒙路8个相邻交叉口的干线协调控制设计为例，用VISSIM仿真软件对改进后的模型进行了仿真测试和评价。结果表明，改进后的模型在绿波带宽与绿灯时间比值方面增加了7.1%，在延误和停车次数方面分别减少了20.8%和30.8%。

Abstract:

This study proposed a revised MULTIBAND model to address the existing problems of the conventional MULTIBAND model, which are restricted solution scope due to the constraint of symmetric green-wave and unstable green-wave performance due to improper location of green-wave within the whole green interval at each intersection. The proposed model removes the constraint of symmetric green-wave to acquire more flexibility of the green-wave, adds another constraint on the green-wave location letting the green-wave as far as possible in the middle of upstream/downstream green interval, and meanwhile modifies the optimization model accordingly. A simulation model based on the empirical data collected at 8 intersections along Yimeng road in the city of Linyi, China, was established to assess the performance of the proposed model. The results showed that the proposed model is able to increase the total green-wave band width by 7.1% and reduce the average delay by 20.8% and number of stops by 30.8% respectively, as compared with the conventional MULTIBAND model.