FU Xin, YANG Yu, SUN Hao. Structural complexity and spatial differentiation characteristics of taxi trip trajectory network[J]. Journal of Traffic and Transportation Engineering, 2017, 17(2): 106-116.
Citation: FU Xin, YANG Yu, SUN Hao. Structural complexity and spatial differentiation characteristics of taxi trip trajectory network[J]. Journal of Traffic and Transportation Engineering, 2017, 17(2): 106-116.

Structural complexity and spatial differentiation characteristics of taxi trip trajectory network

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  • Author Bio:

    FU Xin(1982-), male, lecturer, PhD, +86-29-82334857, fuxin@chd.edu.cn

  • Received Date: 2016-11-18
  • Publish Date: 2017-04-25
  • Based on the GPS trajectory data of taxis, a kind of urban trip complex network was constructed.The structural complexity and differentiation characteristics of taxi trip trajectory network were researched by using the directed-weighted complex network measuring method.Based on the taxi trip data of Xi'an, the network indexes were calculated.Analysis result shows that the average shortest path length of taxi trip trajectory network is 2.07 (edge number), the clustering coefficient is 0.653, and the network density is 0.554.So the network is a kind of typical complex network, with typical "small-world"and "collective"characteristic, and the actual average trip distance obeys log-normal distribution.The average value of node strengthsfor the network is 411, the largest K-nuclear value is 59, and the proportions of nodes with the strengths being less than 600 and 300 are 77.97% and 50.24%, respectively, which shows the typical spatial distribution that is described as"less nodes with greater strengths but more nodes with less strengths".The network has significant spatial differentiation characteristic, the traveling radiation scopes of important traffic analysis zones (TAZs) have overall characteristic, the whole spatial layout of trip intensities is consistent with public transport arterial lines, and presents a cross type distribution.The high-level centricity TAZs in whole network present agglomeration distribution, and the node strengths of important transport hubs (stations) and CBD areas are more than 2 200.The distributions of pick-up and drop-off areas of taxis are nonequilibrium, and the pick-up level is higher than the drop-off level in the important functional zones of city.Obviously, this research result indicates the interaction relationship between the topology structure and spatial differentiation of taxi trip trajectory network, and reveals urban resident activities' spatial characteristics, movement rules and the mutual influence of urban functions' spatial layout and resident activities.

     

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