arXiv:2506.21469cs.CVcs.LG2025-06被引 1

针对日常交通波动,提出动态、静态与混合信号方案优化路口通行效率。

Evaluation of Traffic Signals for Daily Traffic Pattern

  • 设计动态、静态与混合三类信号配置,适配不同交通模式。
  • 90秒和120秒周期在六路口测试中表现最优,混合方案在东西、南北主干道更优。
  • 适合交通流有明显峰谷变化的城市路口信号优化研究者参考。

转向流量计数(TMC)数据对交通信号设计、交叉口几何规划、车流分析及拥堵评估至关重要。本文提出三种基于TMC的信号配置方法:动态、静态与混合。利用拉斯维加斯六个路口的交通摄像头构建视觉追踪系统,估算各路口的TMC。将交叉口设计、行驶路线及信号配置文件导入SUMO仿真平台,结合真实数据进行信号评估。初步实验显示,90秒与120秒周期在所有路口均表现最佳;其中四个路口采用动态信号效果更优,另两个性能较差的路口总车流量与车道数比值较低。鉴于日间交通常呈双峰特征,本文提出一种混合信号方法,在高峰与平峰时段自动切换动态与静态策略,以提升通行效率。通过内置交通生成模块模拟4小时车流,含高峰时段,并由信号设计模块生成静态、动态与混合方案的信号周期。各区域(西、北、东、南)的车流量按权重分配,生成多样化交通模式。扩展实验表明,基于区域的交通分布影响信号选择:静态法适用于各区域流量均衡的情况,而混合法在东西、南北主干道流量高度倾斜时表现更佳。

原文摘要 · Abstract (English)

The turning movement count data is crucial for traffic signal design, intersection geometry planning, traffic flow, and congestion analysis. This work proposes three methods called dynamic, static, and hybrid configuration for TMC-based traffic signals. A vision-based tracking system is developed to estimate the TMC of six intersections in Las Vegas using traffic cameras. The intersection design, route (e.g. vehicle movement directions), and signal configuration files with compatible formats are synthesized and imported into Simulation of Urban MObility for signal evaluation with realistic data. The initial experimental results based on estimated waiting times indicate that the cycle time of 90 and 120 seconds works best for all intersections. In addition, four intersections show better performance for dynamic signal timing configuration, and the other two with lower performance have a lower ratio of total vehicle count to total lanes of the intersection leg. Since daily traffic flow often exhibits a bimodal pattern, we propose a hybrid signal method that switches between dynamic and static methods, adapting to peak and off-peak traffic conditions for improved flow management. So, a built-in traffic generator module creates vehicle routes for 4 hours, including peak hours, and a signal design module produces signal schedule cycles according to static, dynamic, and hybrid methods. Vehicle count distributions are weighted differently for each zone (i.e., West, North, East, South) to generate diverse traffic patterns. The extended experimental results for 6 intersections with 4 hours of simulation time imply that zone-based traffic pattern distributions affect signal design selection. Although the static method works great for evenly zone-based traffic distribution, the hybrid method works well for highly weighted traffic at intersection pairs of the West-East and North-South zones.

交通信号智能调度仿真评估混合策略

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