预信号控制交叉口的交通流组织优化

栗波^1,2，高超¹，樊兆董³

1.山东交通学院交通与物流工程学院，山东 济南  250357；2.北京交通大学交通运输学院，北京  100044；

3.山东省交通科学研究院，山东 济南  250031

摘要：为解决城市道路交叉口交通流饱和及过饱和引发的拥堵难题，提高交叉口交通流组织效率，提出一种预信号控制交叉口交通流组织优化方法，基于交叉口进口道渠化设计和主信号、预信号相位相序协同，提高交叉口进口方向左转与直行交通流通行效率及交叉口时空资源利用率，设计进口方向左转与直行相位连续放行模式和分开放行模式，并进行试验验证。结果表明：交叉口进口道在不同流量下，采用预信号控制交叉口的信号周期、车辆平均延误随进口道流量增大的速率均小于传统单停车线交叉口，采用预信号控制交叉口进口方向左转与直行相位分开放行模式的信号周期、车辆平均延误随进口道流量增大的速率均小于采用预信号控制交叉口进口方向左转与直行相位连续放行模式；在交叉口进口道流量饱和及过饱和时，采用预信号控制交叉口进口方向左转与直行相位分开放行模式的车辆平均延误最短。

关键词：预信号控制；交叉口；交通流；渠化设计；相位相序

Optimization of traffic flow organization at pre-signal controlled intersections

LI Bo^1,2, GAO Chao¹, FAN Zhaodong³

1. School of Transportation and Logistics Engineering, Shandong Jiaotong University, Jinan 250357, China;

2. School of Traffic and Transportation, Beijing Jiaotong University, Beijing 100044, China;

3. Shandong Transportation Research Institute, Jinan 250031, China

Abstract: To address the congestion problems caused by saturated and oversaturated traffic flow at urban road intersections and improve the efficiency of intersection traffic flow organization, an optimization method for traffic flow organization at pre-signal controlled intersections is proposed. Based on the channelization design of intersection approach lane and the coordination of main and pre-signal phase sequences, this method aims to improve the efficiency of left-turn and through traffic flows at intersection approaches and the utilization of intersection temporal and spatial resources. Two operation modes are designed for left-turn and through phases at approaches that continuous release mode and separate release mode. Experimental validation is conducted. Results indicate that: under different traffic volumes at intersection approach lane, pre-signal controlled intersections have smaller average signal cycle times, mean vehicle delays, and rates of increase in average vehicle delay with increasing approach lane traffic volume compared to traditional single-stop-line intersections, the separate release mode of pre-signal controlled intersections performs better than the continuous release mode in terms of average signal cycle times, mean vehicle delays, and rates of increase in average vehicle delay with increasing approach lane traffic volume; under the separate release mode of pre-signal controlled intersections during traffic flow saturated or oversaturated conditions on intersection approach lane, average vehicle delay time is minimized.

Keywords: pre-signal control; intersection; traffic flow; channelization design; phase sequence