不同快速路出口设计通行能力条件下辅路信号控制策略研究

基于元胞传输模型描述快速路出口和辅路的交通流运行,建立了包括交通流模拟模块、虚拟信号机模块和数据交换中心模块等在内的快速路出口辅路信号控制仿真系统。以北京市三环快速路蓟门桥东出口辅路信号控制系统为背景,在出口段存在通行能力瓶颈和不存在通行能力瓶颈两种实验条件下,分析了有无辅路信号控制和不同周期控制策略对系统延误和快速路出口延误的影响。得出辅路信号控制周期存在临界周期;辅路调节率控制相对基于周期的控制方式将产生更小的延误;在辅路出口不存在设计瓶颈时设置辅路信号控制的有效性大大降低等结论。

Study on Auxiliary Road Signal Control Strategy for Different Design Capacities of Expressway Exit

Traffic flow operations of the exit and auxiliary road of the expressway were described based on the cell transmission model,and the signal control simulation system which includes traffic flow simulation module,virtual controller module and data exchange center module,etc.was established.In the context of auxiliary road signal control system in the east of Jimen Bridge of the 3rd ring road in Beijing,the system delay and exit delay under different experimental conditions,including exit with/without capacity bottleneck in the auxiliary road exit section,with/without auxiliary road signal control and different signal control strategy,were analyzed.It is concluded that(1) there exists a critical cycle of the auxiliary road signal control cycle;(2) the metering rate control mode will generate smaller delay than the fixed cycle control mode;(3) the effectiveness of deploying the auxiliary road control system will be reduced when there is no capacity bottleneck in the auxiliary road-exit section.