School of Architecture, Southwest Jiaotong University, Chengdu, China.
Front Public Health. 2022 Sep 6;10:994835. doi: 10.3389/fpubh.2022.994835. eCollection 2022.
Transit-oriented development (TOD) has been regarded as an effective way to improve urban vibrancy and facilitate affordable, equitable, and livable communities in metro station areas (MSAs). Previous studies placed great attention on the interplay between the MSA-level built environment and overall human activities while neglecting the heterogeneity among different age groups. To address this gap, we leverage the mobile phone signaling data to quantify the spatio-temporal distribution of the MSA-level human activities among different age groups as measured by the vibrancy index (VI). Furthermore, we investigate the impact of the MSA-level built environment on the VI and its intergenerational differences by employing multiple linear regressions based on multi-sourced data. To this end, Chengdu-a TOD-thriving megacity in China-is chosen as a case study. The results indicate that: (1) Residential and bus stop density are positively associated with the VI. And the magnitudes of the correlation coefficients are similar among different age groups. (2) Distance to CBD is negatively associated with the VI of teenagers (12-18 years), middle-aged adults (40-59 years), and older adults (above 60 years) but unrelated to the VI of young adults (19-39 years). (3) Employment density is positively associated with the VI of young and middle-aged adults but insignificantly associated with the VI of teenagers and older adults. (4) The correlations between the floor area ratio and the VI are positive for all age groups. As age increases, the significance of such correlations becomes more pronounced. (5) Streetscape greenery shows a more significant positive correlation with the VI of teenagers and older adults as compared to those of young and middle-aged adults. (6) Significant negative correlations exist between housing price and the VI of different age groups. The findings can inform the development and design of vibrant TOD communities.
交通导向型发展（TOD）被认为是一种提高城市活力、促进地铁站区（MSA）内经济适用、公平和宜居社区的有效方式。先前的研究主要关注 MSA 级建成环境与整体人类活动之间的相互作用，而忽略了不同年龄组之间的异质性。为了解决这一差距，我们利用手机信号数据来量化 MSA 级人类活动在不同年龄组之间的时空分布，其测度指标为活力指数（VI）。此外，我们通过基于多源数据的多元线性回归，研究了 MSA 级建成环境对 VI 及其代际差异的影响。为此，选择中国 TOD 繁荣的特大城市成都作为案例研究。结果表明：（1）住宅和公交站密度与 VI 呈正相关。并且不同年龄组之间的相关系数大小相似。（2）到 CBD 的距离与青少年（12-18 岁）、中年成年人（40-59 岁）和老年人（60 岁以上）的 VI 呈负相关，但与青年成年人（19-39 岁）的 VI 无关。（3）就业密度与青年和中年成年人的 VI 呈正相关，但与青少年和老年人的 VI 无关。（4）对于所有年龄组，建筑面积率与 VI 之间的相关性均为正相关。随着年龄的增长，这种相关性的显著性变得更加明显。（5）与青年和中年成年人相比，街景绿化与青少年和老年人的 VI 呈更显著的正相关。（6）不同年龄组的房价与 VI 之间存在显著的负相关关系。这些发现可以为充满活力的 TOD 社区的发展和设计提供信息。
