基于Synchro系统的单点交叉口交通信号优化

Isolated Intersection Traffic Signal Optimization Based on Synchro

单点交叉口作为路网中的一个小单元,设置合理的信号配时方案,能有效提高路口通行效率,避免节点拥堵向路网扩散。首先,分析Synchro 8.0系统中的交通信号配时和相位优化模型;其次,以交叉口总延误、停车次数、服务水平和燃油消耗等综合指标对交叉口进行信号优化;最后,以深圳市龙岗区五和大道—贝尔路这个典型的十字型信号交叉口为例,使用延误和停车次数等性能指标对路口进行全面优化。经Synchro系统优化后,交叉口总延误由686.0 s下降到555.3 s,降低了19.05%;燃油消耗由503 L下降到440 L,优化率为12.52%;CO排放由9296 g下降到8156 g,优化率为12.26%;VOC排放由2156 g下降到1892 g,优化率为12.24%;NOx排放由1808 g下降到1587 g,优化率为12.22%。交叉口的整体服务水平由F级上升到了E级。仿真结果表明,应用Synchro 8.0系统可以有效提高交叉口通行效率。

As a small unit in the road network,setting a reasonable signal timing at isolated intersection can effectively improve the crossing efficiency and avoid the diffusion of node congestion to the road network.Firstly,the traffic signal timing and phase optimization model in Synchro 8.0 system was analyzed.Secondly,the signal optimization of the intersection was carried out based on the overall index of intersection delay,parking times,service level and fuel consumption.Finally,taking the typical intersection of Wu he Avenue Bell Road in Long gang District,Shenzhen as an example,performance indicators such as delay and stopping times were used to comprehensively optimize the intersection.After Synchro system optimization,the total delay at intersections decreased from 686.0 s to 555.3 s,a decrease of 19.05%.The fuel consumption has decreased from 503 L to 440 L,with an optimization rate of 12.52%;CO emissions decreased from 9296 g to 8156 g,with an optimization rate of 12.26%;VOC emissions decreased from 2156 g to 1892 g,with an optimization rate of 12.24%;NOx emissions decreased from 1808 g to 1587 g,with an optimization rate of 12.22%.The overall service level of the intersection has increased from level F to level E.The simulation results show that the application of the Synchro 8.0 system can effectively improve the traffic efficiency of intersections.