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针对城市快速路的常发性拥堵现象,在尖点突变理论的基础上,利用实测数据样本,从拥堵的形成和消散两个角度分析对比了流量、速度、占有率三个参数的关联特征,对交通流拥堵的演化过程进行了详细的阐述。将交通流参数随时间的分布与尖点突变平衡曲面联合,利用坐标变换将实测数据转换成尖点突变的投影分布,在空间上,通过分析不同车道拥堵的形成和消散过程,完整地展示出交通流拥堵的时空演化机理。本文的研究从时空的角度出发,综合多个交通流参数对拥堵进行界定,利用交通流在尖点突变平衡曲面的分布,预测拥堵出现的临界点以及消散过程,为制定交通拥堵的控制和疏导策略提供指导性建议。
According to the cusp catastrophe theory and the measured data samples, the correlation characteristics of the three parameters of traffic flow, speed and occupancy are analyzed and compared from the perspective of congestion formation and dissipation. The evolution of traffic jam is explained in detail. Combining the distribution of traffic flow parameters over time with the cusp catastrophe equilibrium surface, the measured data are transformed into the cusp catastrophe projection distribution by coordinate transformation. In space, by analyzing the formation and dissipation processes of different lane congestion, The Temporal and Spatial Evolution Mechanism of Traffic Congestion. In this paper, from the perspective of space-time, the paper defines traffic congestion by combining multiple traffic flow parameters, predicts the critical point of traffic congestion and the dissipation process by using the distribution of traffic flow in the sudden change of balance surface, Strategy provides guidance.