城市快速路匝道调节与动态速度引导的协同策略

介绍了入口匝道调节和主线动态速度引导的基本方法,提出了二者协同运作的控制策略,分析了速度引导下的快速路交通流模型,并建立了以主线服务流率最大和匝道排队延误最小为目标的匝道调节与速度引导的协同函数,通过VISSIM软件进行了协同策略的模拟试验。对比结果表明,通过对主线进行预案速度引导、然后计算匝道调节率的方法可以增加主线实际通行能力10％以上,节约路线平均行程时间30％以上。

Study on coordination of ramp metering and dynamic speed guidance for urban expressway

The merging ramp metering and main road dynamic speed guidance technique for the effective management on the urban expressway was introduced and their coordination strategy of control and guidance was suggested. A traffic flow model of the expressway under the speed guidance condition was derived and an optimal coordination function for ramp metering and main road speed guidance to maximize the expressway service capacity and minimize the ramp queue delay was built. The suggested coordination strategy was simulated by the software VISSIM. The results showed that with the dynamic speed guidance on the main orad and the ramp metering the urban expressway traffic flow capacity increases over 10% , and the average travel time decreases over 30%.