The impact of traffic on air quality has prompted many cities to implement policies such as driving and parking restrictions, congestion fees, or investing in public transport infrastructure. This paper focuses on the effects on pollution levels of a new cable car system in Mexico City, a very polluted megalopoly. This cable car system provides transportation to historically marginalized communities situated in a mountainous area at an altitude high enough to make metro connectivity impossible. The study uses official NO2 level data to estimate a Diff-in-Diff model. The results show a drop in NO2 levels of approximately 13 % not only in the stations closest to the Cablebus, but also in areas located further away. Our results suggest that the potential environmental benefits of new green transport infrastructures should be taken into account by policymakers when making decisions related to public transit systems.

中文翻译：

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评估新墨西哥缆车对空气污染的影响


交通对空气质量的影响促使许多城市实施政策，例如限制驾驶和停车、收取拥堵费或投资公共交通基础设施。本文重点介绍了墨西哥城（一个污染严重的大都市）新缆车系统对污染水平的影响。该缆车系统为位于山区历史上被边缘化的社区提供交通服务，这些社区的海拔高度足以使地铁无法连接。该研究使用官方的 NO2 水平数据来估计 Diff-in-Diff 模型。结果显示，不仅在最靠近 Cablebus 的车站，而且在较远的地区，NO2 水平下降了约 13%。我们的结果表明，政策制定者在做出与公共交通系统相关的决策时应考虑新的绿色交通基础设施的潜在环境效益。