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以长春市这一典型单中心扩展型城市为例,通过对1980年、1985年、2000年和2007年4个时间断面60个道路交叉口交通量的数据分析,研究典型单中心扩展型城市的主要道路交叉口交通量时空演变特征和规律,得出的主要结论为:(1)主要道路交叉口人流量与车流量的空间分布及演变特征带有典型的单中心圈层式扩展和轴向集聚特点,即圈层式中心放射状特征。具体表现为城市中心区交通量和道路利用率较高,边缘区交通量和道路利用率偏低;(2)主要道路交叉口人流量与车流量时空演变特征存在差异,人流量增幅较小、增速较慢,历年间变异系数均维持较高水平且变化不大,中心集聚特征明显。车流量增幅较大、增速较快,历年间变异系数均较人流量小且变化较大,在中心集聚的基础上,沿主要交通干道呈现明显的点轴式集中特征;(3)虽然1980～2007年主要道路交叉口人流量与车流量发生较大变化,但交通量时空分布格局并没有根本改变,反映出单中心扩展型城市空间结构对交通量空间分布的强大制约性。
Taking Changchun, a typical single center extended city, as an example, the author analyzes the traffic volume of 60 road intersections at four time intervals in 1980, 1985, 2000 and 2007, and studies the typical single-center extended cities The main conclusions of the main conclusions are as follows: (1) The spatial distribution and evolution characteristics of traffic flow and traffic volume at the main road intersections are characterized by typical single-center sphericity expansion and axial Agglomeration characteristics, namely the radial center of the circle characteristics. Specifically, the traffic volume and road utilization rate are high in the downtown area, and the traffic volume in the fringe area and the road utilization rate are low; (2) The spatial and temporal evolution characteristics of passenger flow and traffic flow at the main road intersections are different, The growth rate is slow, the coefficient of variation of the past years are maintained at a high level with little change, the center concentration characteristics are obvious. The traffic flow increased greatly and the growth rate was fast. The variation coefficient over the years was smaller and more varied than the human traffic flow. On the basis of the central agglomeration, obvious focal point-axis concentration characteristics were observed along the main traffic roads. (3) From 2007 to 2007, the traffic volume and traffic volume of major road intersections changed greatly. However, the spatial and temporal distribution pattern of traffic volume did not change fundamentally, reflecting the strong restriction of the spatial structure of single-center expansion city on the spatial distribution of traffic volume.