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arXiv 1407.0145physics.soc-phcs.SI
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量化城市内部空间相互作用的长期演变

Quantifying long-term evolution of intra-urban spatial interactions

Lijun Sun, Jian Gang Jin, Kay W. Axhausen, Der-Horng Lee, Manuel Cebrian

摘要:

了解城市交通基础设施的变化对其空间相互作用的长期影响仍然是一个挑战。困难的原因是,实际影响可能无法在静态或汇总流动性措施中显示出来,因为这些措施对扰动非常强大。更普遍地说,缺乏纵向、横截面数据来证明在有意义的城市尺度上空间相互作用的演变,也阻碍了我们评估移动指标的敏感性,限制了我们深入了解城市移动性演变的能力。使用非常大的流动性记录分布在三年内,我们量化的影响完成了地铁线路延伸:在新加坡的环线(CCL)。我们发现,项目完成前后,常用的运动指标几乎相同。然而,在比较跨年的时间群落结构,我们观察到受影响的地理区域的空间重组显着差异。CCL的建成使旅行者能够以更低的交通成本重新确定他们想要的目的地,使社区结构更加一致。这些局部变化是动态的,并且在短时间尺度上具有特征,为我们提供了一种不同的方法来识别和分析新基础设施对城市及其演变动态的长期影响。

英文摘要:

Understanding the long-term impact that changes in a city's transportation infrastructure have on its spatial interactions remains a challenge. The difficulty arises from the fact that the real impact may not be revealed in static or aggregated mobility measures, as these are remarkably robust to perturbations. More generally, the lack of longitudinal, cross-sectional data demonstrating the evolution of spatial interactions at a meaningful urban scale also hinders us from evaluating the sensitivity of movement indicators, limiting our capacity to understand the evolution of urban mobility in depth. Using very large mobility records distributed over three years we quantify the impact of the completion of a metro line extension: the circle line (CCL) in Singapore. We find that the commonly used movement indicators are almost identical before and after the project was completed. However, in comparing the temporal community structure across years, we do observe significant differences in the spatial reorganization of the affected geographical areas. The completion of CCL enables travelers to re-identify their desired destinations collectively with lower transport cost, making the community structure more consistent. These changes in locality are dynamic, and characterized over short time-scales, offering us a different approach to identify and analyze the long-term impact of new infrastructures on cities and their evolution dynamics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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