基于运行参数-几何参数关系的信号控制方法——以K型交叉口为例

Signal Control Based on Operation-Geometric Parameter: A Case Study of K-Shaped Intersection

受城市发展历史原因影响,畸形交叉口在中国城市老城区的分布较为普遍,其中包括K型交叉口。为了提升城市道路通行效率及安全水平,结合哈尔滨市5处典型K型交叉口调查数据,在分析其几何参数及交通流运行参数的基础上,构建K型交叉口运行参数-几何参数关系模型。通过交叉口的交通流线分析、交通冲突点计算、交通冲突强弱界定等步骤,提出一种旨在提高K型交叉口通行效率的信号控制方法。最后,以某典型K型交叉口为案例,对实施前后的交叉口交通流运行状态进行仿真与对比分析。结果表明,基于运行参数-几何参数关系的K型交叉口信号控制方法,可以减少车流在路网上的绕行时间,有效提升交叉口及其周边道路网的通行效率。

The unconventional intersections, likely K-shaped intersection, are prevalent in the old town of the cities in China due to historical reasons. In order to improve traffic efficiency and safety, this paper models the relationship of operation-geometric parameter using a survey data from 5 typical K-shaped intersections in Harbin to explore the two parameter sets. Through targeting traffic stream lines, calculating traffic conflict points, defining the degree of traffic conflict, and etc., the paper proposes a signal control method for improving operational efficiency of the K-shaped intersection. Taking a typical K-shaped intersection as an example, the paper simulates the operational performance before and after implementing the proposed control strategy. The results show that the proposed method can reduce the detours and improve traffic efficiency at intersection as well as the whole roadway network.