Understanding Topological and Spatial Attributes of Bus Transportation Networks in Cities of Chongqing and Chengdu

Figure 12

Plot of “average degree–distance” distribution function. In both BTNs observed, the nodes within 25 kilometers from the central origin node account for more than 90%, so that the upper limit of the distance observed was set to 25 kilometers. Meanwhile, about half of the sites are distributed within 10 kilometers from the central origin node (41.2% for BTN-CQ, 56.3% for BTN-CD), so that the area within 10 kilometers from the origin node was mainly analyzed.