交叉口可变导向车道控制优化模型

Optimization model for controlling reversible approach lanes at signalized intersections

为了均衡交通流向分布且保证控制方案平稳过渡,提出具有可变导向车道的交叉口时空资源优化模型以及可变导向车道标志与信号灯组协调控制方法。为验证本文模型与方法的有效性,借助数学软件MATLAB、交通仿真软件VISSIM及其信号控制逻辑工具VisVAP,使用一个算例对比分析可变导向车道控制方案与固定导向车道控制方案。结果表明:与固定导向车道控制方案相比,可变导向车道控制方案使具有可变导向车道的进口道及交叉口的车均延误分别降低3%~50%和7%~15%,说明可变导向车道控制优化模型能适应交叉口交通需求的潮汐特性,可变导向车道标志与信号灯组协调控制方法能保证交通流安全、平稳运行。

To balance directional distribution of traffic flow and ensure the smooth transition of control scenario, an optimization model of time-space resource allocation at an intersection with reversible approach lanes and a coordinated control method for a reversible approach lane and corresponding signal group are proposed. To validate the effectiveness of the optimization model and control method, a case study is carried out to analyze the control scenarios with reversible approach lanes and with fixed approach lanes. The software MATLAB, traffic simulation software VISSIM and the signal control logic tool VisVAP are used in this study. Results show that, comparing to the control scenario with fixed approach lane, the average delay can be reduced by 3% -50 % and 7 % -15 % for the approach with reversible lane and the entire intersection, respectively. The achievements indicate that the proposed optimization model can satisfy the tidal traffic demands at intersections and the control method can guarantee the safe and steady traffic flow operation.