基于车路协同的交通瓶颈路段车流动态分配机制及模型

Dynamic allocation mechanism and model of traffic flow in bottleneck section based on vehicle infrastructure cooperation

针对快速路瓶颈路段存在大量的车道变换行为而造成的交通拥堵问题,以快速路交织区这一交通流频变区域为例,分析其车路协同运行特征,建立了交通瓶颈路段车流动态分配模型,采用C-V2X、边缘计算等技术,设计基于车路协同的车流动态分配系统,研究其运行机制。运用MATLAB元胞传输模型仿真分析了车流分配系统,仿真结果表明:动态分配系统优化效果明显,在同步流状态下通行时间缩短11.4%左右,拥堵流状态下通行时间缩短幅度可达39.7%。研究结果对减少快速路交织瓶颈区域的运行延误,提高车流运行效率和快速路通行能力具有重要意义。

In response to the traffic congestion caused by a large number of lane-changing behaviors in bottleneck sections of expressways,taking the weaving section of expressway as an example,which is a frequency variable area of traffic flow,this paper analyzes the characteristics of vehicle infrastructure cooperation operation,establishes a dynamic assignment model of traffic flow in the bottleneck section,uses C-V2X,edge computing and other technologies,designs a dynamic allocation system of vehicle flow based on vehicle infrastructure cooperation,and studies its operation mechanism.The traffic flow allocation system is simulated and analyzed using MATLAB cellular transmission model.The simulation results show that the optimization effect of the dynamic allocation system is obvious.The traffic time is reduced by about 11.4% in synchronous flow state and 39.7% in congested flow state.The research results are of great significance to reduce the operation delay in the weaving bottleneck area of the expressway and improve the traffic flow efficiency and expressway capacity.