论文标题
大城市对可持续运输的效率较低：流动性的ABC
Large cities are less efficient for sustainable transport: The ABC of mobility
论文作者
论文摘要
在城市中使用汽车对其人口有许多负面影响，包括污染，噪音和空间使用。但是，检测减少汽车依赖性的因素是一个严重的挑战，尤其是在不同地区。在这里，我们通过汇总主动移动性（A），公共交通（B）和汽车（C）来对城市中不同的交通方式进行建模，从而通过其ABC三胞胎表达了城市的模态份额。在60个国家 /地区的近800个城市的数据用于建模汽车使用及其与城市规模和收入的关系。我们的发现表明，在美国以外的大城市中经历的更长距离降低了积极的流动性和汽车的倾向，但公共交通工具更为突出。对于美国的城市，其机动性的大约90％取决于汽车，而不论城市规模如何。此外，收入与汽车依赖性密切相关。结果表明，拥有收入的两倍的城市乘汽车多37％。
The use of cars in cities has many negative impacts on its population, including pollution, noise and the use of space. Yet, detecting factors that reduce automobile dependency is a serious challenge, particularly across different regions. Here we model the use of different modes of transport in a city by aggregating active mobility (A), public transport (B) and cars (C), thus expressing the modal share of a city by its ABC triplet. Data for nearly 800 cities across 60 countries is used to model car use and its relationship with city size and income. Our findings suggest that outside the US, longer distances experienced in large cities reduce the propensity of active mobility and of cars, but public transport is more prominent. For cities in the US, roughly 90\% of its mobility depends on cars, regardless of city size. Further, income is strongly related to automobile dependency. Results show that a city with twice the income has 37\% more journeys by car.
