论文部分内容阅读
由于目前单路段的交通信息不足以反映网络层次上的交通状态,该文提出了一种网络交通状态的建模方法。首先根据网络中各路段间拓扑结构关系提出了路段邻接矩阵;进而从实际交通流量数据出发,应用递推最小二乘法估计出交叉口各方向上实时的转弯率,由此得到邻接路段分配系数矩阵。通过对该矩阵的简单计算以及变换,得到了整个路网的分配系数矩阵。根据该矩阵绘制的网络交通状态图为研究网络交通状态演化提供了可视化方法。该矩阵不仅反映了网络层次上的交通流分配情况,也反映了实时的网络交通状态。
Due to the fact that the traffic information of single section is not enough to reflect the traffic status at the network level, this paper presents a method of modeling the traffic state of the network. Based on the actual traffic flow data, the recursive least squares method is used to estimate the real-time turning rate in all directions of the intersection, and the distribution coefficient matrix of adjacent links is obtained. . Through the simple calculation and transformation of the matrix, the distribution coefficient matrix of the entire road network is obtained. The network traffic state diagram drawn from this matrix provides a visual method for studying the evolution of network traffic state. The matrix not only reflects the distribution of traffic flow at the network level, but also reflects the real-time network traffic status.