Highlights We empirically investigate the effects of HSR on air pollution along highways. We employ the difference-in-differences approach to achieve the causal inference. CO declined by a 0.047 mg/m3 in areas close to highways affected by HSR. There is no evidence that the opening of HSR affects PM2.5 or ozone. Air pollution reduction resulted from the substitution effect of HSR on highways.
Abstract Evaluating the environmental effects of the transportation infrastructure is vitally important. Many studies have verified the effects imposed by intra-city rail transit (metro, light rail or subway) on air pollution, but seldom pay attention to the environmental effect of inter-city railway. This paper takes the high-speed railway (HSR) in China, which was newly opened in 2015 and 2016, as a quasi-natural experiment and quantifies how HSR affects air quality along highways. Based on the difference-in-differences estimation, carbon monoxide, one of the main pollution sources from automobile, has experienced a 0.047 mg/m3 reduction (4.3% of the mean) in the areas close to those highways affected by newly-opened HSR, relative to the areas not affected by HSR. However, there is no evidence that the opening of HSR affects PM2.5 or ozone. Heterogeneity analysis supports that the air pollution reduction resulted from the substitution effect of HSR on highways.
Does high-speed railway reduce air pollution along highways? —— Evidence from China
2020-01-01
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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