交通运输系统工程与信息

交通运输系统工程与信息 ›› 2024, Vol. 24 ›› Issue (6): 86-101.DOI: 10.16097/j.cnki.1009-6744.2024.06.008

• 智能交通系统与信息技术 • 上一篇    下一篇

考虑跨相位冲突的环形交叉口信号周期计算方法

卢凯1a,1b，陈志学1a，林永杰1a，郭海锋*2   

  1. 1. 华南理工大学，a.土木与交通学院，b.亚热带建筑与城市科学全国重点实验室，广州510640； 2. 浙江工业大学，网络空间安全研究院，杭州310023
  • 收稿日期:2024-07-18 修回日期:2024-08-14 接受日期:2024-08-20 出版日期:2024-12-25 发布日期:2024-12-18
  • 作者简介:卢凯(1979- )，男，湖南益阳人，教授，博士。
  • 基金资助:
    国家自然科学基金 (52172326, 52072343)；广东省基础与应用基础研究基金(2023A1515012815)。

Calculation Method of Signal Cycle at Roundabouts Considering Cross-phase Conflicts

LUKai1a,1b, CHEN Zhixue1a, LIN Yongjie1a, GUO Haifeng*2   

  1. 1a. School of Civil Engineering and Transportation, 1b. State Key Laboratory of Subtropical Building and Urban Science, South China University of Technology, Guangzhou 510640, China; 2. Institute of Cyberspace Security, Zhejiang University of Technology, Hangzhou 310023, China
  • Received:2024-07-18 Revised:2024-08-14 Accepted:2024-08-20 Online:2024-12-25 Published:2024-12-18
  • Supported by:
    NationalNaturalScienceFoundation of China (52172326, 52072343)；GuangdongBasic andApplied Basic Research Foundation (2023A1515012815)。

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摘要： 针对信号控制环形交叉口中存在的车流跨相位冲突问题，通过分析车辆在环形交叉口内的行驶轨迹，根据相位通行时间、相位间隔时间及最短相位间隔时间的特点，建立基本周期等式与跨相位间隔时间等式约束。结合相位通行时间、相位间隔时间以及信号周期的不等式约束，考虑环形交叉口相位设计中可能出现总损失时间为负的情况，建立以信号周期最小为优化目标的环形交叉口基本信号配时模型。针对不同相位有序集合，建立一般周期等式与不等式约束，分析不同相位集合下周期取值范围随各相位流量的变化情况，给出环形交叉口信号周期取值范围的计算方法。以总流量比等于1.05为例进行仿真分析，当信号周期取最短信号周期52s时，交叉口的各项评价指标均达到或接近最佳值。针对3种不同的交叉口进口流量情形，将本文方法与左转二次放行方法及改建十字交叉口方案进行对比分析。实验发现，两种环形交叉口控制方法较十字交叉口控制方法的延误时间与排队长度分别降低了52%和55%，在对向进口流量不均衡时，本文方法较二次停车方法延误时间与排队长度分别降低了43%和44%。此外，以广州市华夏路—金穗路环形交叉口为例进行仿真分析，对比发现，本文方法方案在延误时间、停车次数及排队长度等方面取得了较优的整体控制效益。

关键词: 交通工程, 信号控制, 跨相位, 环形交叉口, 信号周期

Abstract: To solve the cross-phase conflict problem in traffic flow at signalized roundabouts, this paper analyzes the vehicle trajectory within roundabout and develops a fundamental cycle equation and cross-phase interval equations based on the characteristics of phase passage time, phase interval time, and minimum phase interval time. Based on the inequality constraints of phase passage time, phase interval time and signal cycle, this paper proposes a basic signal timing model for roundabouts with the minimzed signal cycle and considers the possibility of negative total loss time in the phase design of roundabouts. The general cycle equations and inequality constraints are analyzed under different ordered phase sets. The variation of the cycle range with the flow rate of each phase are analyzed under different phase sets, and a calculation method is proposed for signal cycle range at roundabout. The simulation verification was conducted using a total flow ratio of a roundabout equal to 1.05 as an example. The results show that when signal cycle was set to the shortest signal cycle of 52 seconds, all evaluation indicators reached or approached the optimal value. The proposed method was compared with the two-stop-line-for-left-turn method and the reconstruction into a cross-intersection under three different traffic volume of entrance. It was found that the delay time and the average queue length of two roundabout control methods was reduced by 52% and 55%, compared to the cross-intersection control method. The average delay and the average queue length of the proposed method was reduced by 43% and 44%, compared with the two-stop-line-for-left-turn method, when the flow at the opposite entrance was unbalanced. In addition, taking the Huaxia-Jinsui roundabout in Guangzhou as an example, simulation analysis showed that the proposed method had the overall control benefits in terms of vehicle delay, stops and queue length.

Key words: traffic engineering, signal control, cross-phase, roundabout, signal cycle

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