干线局部拥堵的绿波带与红波带协调控制策略

Coordinated Control of Green Wave and Red Wave Band for Arterials

中国城市机动车保有量快速上升,导致交通需求与供给之间的矛盾日益突出,城市交通拥堵日益严重。针对干线局部拥堵提出绿波带与红波带协调控制策略。其原理是:通过绿波带控制,利用下游交叉口和路段,对瓶颈交叉口的拥堵车流进行快速疏散和卸载;通过红波带控制,运用上游交叉口和路段的空间优势,有效地将到达瓶颈交叉口的车流分别截流在上游的交叉口和路段,延长其到达瓶颈交叉口的行程时间,以防止瓶颈交叉口的拥堵蔓延和上溯。选择交叉口进口道协调相位饱和度和路段排队长度比作为评估指标,讨论协调控制策略的启动与结束条件。通过交叉口关联度模型分析协调控制的范围,并对协调控制的绿波带和红波带进行控制方案设计。算例分析表明,绿波带与红波带协调控制策略可以明显降低车辆在干线交叉口上的平均停车次数(-15%)和平均延误(-27%),提高干线交通运行效率。

With the significant increasing of motor vehicles ownership across Chinese cities, the contradiction between the travel demand and supply becomes more and more prominent, which makes urban traffic congestion deterioration. A coordinated control strategy of green wave and red wave band is thus proposed for mitigating traffic congestion on arterials in this paper. It is designed to use green wave band for utilizing the capacity of downstream intersections and segments to discharge the congested traffic at the bottleneck intersections, in the meantime, to use red wave band for utilizing the space on upstream intersections and segments to hold the traffic approaching bottleneck intersections. The paper further selects saturation of coordinated phase and ratio of queue length as indicators for controlling activation and termination of proposed strategy. Then, a relation model is adopted to explore the workable range of proposed methodology. The results show that coordinated control strategy is able to reduce the average number of stops by15% and delays by 27%.